Oshkosh, WI Natural Disasters and Weather Extremes
Hot Rankings
The chance of earthquake damage in Oshkosh is about the same as Wisconsin average and is much lower than the national average. The risk of tornado damage in Oshkosh is much higher than Wisconsin average and is much higher than the national average.
Earthquake Index, #365
| Oshkosh, WI | 0.00 |
| Wisconsin | 0.00 |
| U.S. | 1.81 |
The earthquake index value is calculated based on historical earthquake events data using USA.com algorithms. It is an indicator of the earthquake level in a region. A higher earthquake index value means a higher chance of an earthquake.
Volcano Index, #1
| Oshkosh, WI | 0.0000 |
| Wisconsin | 0.0000 |
| U.S. | 0.0023 |
The volcano index value is calculated based on the currently known volcanoes using USA.com algorithms. It is an indicator of the possibility of a region being affected by a possible volcano eruption. A higher volcano index value means a higher chance of being affected.
Tornado Index, #110
| Oshkosh, WI | 229.44 |
| Wisconsin | 153.98 |
| U.S. | 136.45 |
The tornado index value is calculated based on historical tornado events data using USA.com algorithms. It is an indicator of the tornado level in a region. A higher tornado index value means a higher chance of tornado events.
Other Weather Extremes Events
A total of 3,225 other weather extremes events within 50 miles of Oshkosh, WI were recorded from 1950 to 2010. The following is a break down of these events:
| Type | Count | Type | Count | Type | Count | Type | Count | Type | Count |
| Avalanche: | 0 | Blizzard: | 14 | Cold: | 49 | Dense Fog: | 112 | Drought: | 64 |
| Dust Storm: | 0 | Flood: | 127 | Hail: | 786 | Heat: | 42 | Heavy Snow: | 131 |
| High Surf: | 0 | Hurricane: | 0 | Ice Storm: | 18 | Landslide: | 0 | Strong Wind: | 82 |
| Thunderstorm Winds: | 1,295 | Tropical Storm: | 0 | Wildfire: | 2 | Winter Storm: | 137 | Winter Weather: | 49 |
| Other: | 317 | ||||||||
Volcanos Nearby
No volcano is found in or near Oshkosh, WI.
Historical Earthquake Events
No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Oshkosh, WI.
No historical earthquake events found in or near Oshkosh, WI.
Historical Tornado Events
A total of 82 historical tornado events that had recorded magnitude of 2 or above found in or near Oshkosh, WI.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 3.5 | 1974-04-21 | 4 | 43°54'N / 88°41'W | 44°04'N / 88°32'W | 13.50 Miles | 200 Yards | 0 | 35 | 2.5M | 0 | Winnebago |
| 10.5 | 1964-05-08 | 2 | 44°07'N / 88°43'W | 44°14'N / 88°25'W | 16.60 Miles | 63 Yards | 0 | 5 | 2.5M | 0 | Winnebago |
| 10.7 | 1984-04-27 | 4 | 44°05'N / 88°45'W | 44°15'N / 88°32'W | 12.00 Miles | 60 Yards | 1 | 10 | 2.5M | 0 | Winnebago |
| 13.4 | 1979-08-09 | 2 | 44°04'N / 88°18'W | 1 | 0 | 25K | 0 | Calumet | |||
| 13.9 | 1956-04-03 | 4 | 43°59'N / 88°56'W | 44°03'N / 88°45'W | 9.60 Miles | 440 Yards | 0 | 0 | 2.5M | 0 | Waushara |
| 14.0 | 1954-06-20 | 2 | 43°57'N / 88°18'W | 0.50 Mile | 33 Yards | 0 | 0 | 0K | 0 | Calumet | |
| 16.8 | 1974-04-21 | 4 | 43°45'N / 88°50'W | 43°54'N / 88°41'W | 12.50 Miles | 200 Yards | 0 | 0 | 2.5M | 0 | Fond Du Lac |
| 17.4 | 1964-08-22 | 2 | 43°48'N / 88°24'W | 2.00 Miles | 33 Yards | 0 | 2 | 3K | 0 | Fond Du Lac | |
| 17.4 | 1990-06-02 | 2 | 43°47'N / 88°27'W | 1.00 Mile | 100 Yards | 0 | 1 | 2.5M | 0 | Fond Du Lac | |
| 17.7 | 1965-07-08 | 2 | 44°10'N / 88°18'W | 44°11'N / 88°15'W | 0 | 0 | 25K | 0 | Calumet | ||
| 18.5 | 1964-08-22 | 2 | 43°46'N / 88°27'W | 1.00 Mile | 500 Yards | 0 | 0 | 250K | 0 | Fond Du Lac | |
| 18.6 | 1968-08-19 | 2 | 43°45'N / 88°54'W | 43°46'N / 88°22'W | 26.40 Miles | 50 Yards | 0 | 1 | 25K | 0 | Fond Du Lac |
| 18.8 | 1962-06-17 | 2 | 43°50'N / 88°50'W | 1.00 Mile | 33 Yards | 0 | 0 | 25K | 0 | Fond Du Lac | |
| 19.4 | 1950-06-25 | 3 | 43°57'N / 88°57'W | 43°58'N / 88°56'W | 0 | 0 | 250K | 0 | Green Lake | ||
| 19.7 | 1996-07-18 | 2 | 43°56'N / 88°14'W | 43°53'N / 88°10'W | 4.40 Miles | 200 Yards | 1 | 1 | 450K | 300K | Fond Du Lac |
| Brief Description: A strong tornado (F2) struck Marytown, resulting in 1 fatility (81 year old male) and 1 injury. This tornado actually touched down in Calumet county about 1.1 miles SE of Jericho (see WFO GRB Stormdata report), and then headed southeast into into Fond du Lac county at a point 2.0 NW of Marytown. It destroyed or damaged at least a couple dozen barns, sheds, and homes on a southeastward path. Many large trees were uprooted. The north side of Marytown was hit the hardest, where a house trailer, 3 homes, and a machine shed were destroyed. The tornado exited Fond du Lac county at a point 2.5 miles SE of Marytown and re-entered Calumet county where it quickly dissapated. The path length in Fond du Lac county was 4.4 miles. M81PH | |||||||||||
| 19.8 | 1956-04-03 | 4 | 43°56'N / 88°58'W | 43°59'N / 88°56'W | 1.90 Miles | 440 Yards | 7 | 50 | 2.5M | 0 | Green Lake |
| 20.6 | 1992-09-07 | 2 | 43°54'N / 89°02'W | 43°58'N / 88°53'W | 8.50 Miles | 400 Yards | 0 | 1 | 2.5M | 0 | Green Lake |
| 21.3 | 1954-04-07 | 2 | 43°42'N / 88°32'W | 43°44'N / 88°29'W | 1.90 Miles | 33 Yards | 0 | 0 | 3K | 0 | Fond Du Lac |
| 21.4 | 1977-06-05 | 3 | 43°49'N / 88°44'W | 43°39'N / 88°42'W | 11.20 Miles | 300 Yards | 0 | 2 | 2.5M | 0 | Fond Du Lac |
| 21.9 | 1996-07-18 | 5 | 43°42'N / 88°37'W | 43°43'N / 88°23'W | 13.30 Miles | 400 Yards | 0 | 12 | 39.5M | 900K | Fond Du Lac |
| Brief Description: A violent tornado struck the village of Oakfield at about 1815CST after it touched down 4 miles WNW of the village. During its approach on Oakfield it intensified to a F3 rating. When it tore through the village it intensified to a F4, but along its path 1 to 4 miles east of the village it intensified to F5 strength (estimated 265 mph winds). In this span 4 homes were completely swept clean off their foundations and a couple automobiles became airborne missles for a distance of about 400 feet. The core width of the most intense damage was about 150 to 200 yards, although at times, some secondary damage was observed in a 400 yard wide path. Oakfield residents heard local sirens about 8 minutes before the torando entered the village. Miraculously, no one was killed, but there were 12 injuries. Some of the injured were hospitalized. Along the tornadoes path, 60 homes and 6 businesses were destroyed. An additional 130 homes and businesses were damaged. In Oakfield, a commercial canning company was devastated. Two churches in the village were also destroyed, as well as numerous vehicles. In the rural areas along the tornadoes path, 18 barns and many sheds were destroyed or damaged, and about 500 acres of crops were wiped out. Total damage amounts were $39.5 million in public/private property, and $900,000 in crop losses. Residents reported that they had difficulty "popping" their ears as the tornado roared through their neighborhood. Prior to entering Oakfield, the tornado hopped and skipped a few times, and multiple votices were observed at times during its life cycle. Witnesses reported that the tornado "paused" for a minute or so on the southeast edge of Oakfield. As the tornado tore through Oakfield it changed it's heading to east. Corn fields just east of Oakfield were reduced to short 1 to 4 inch high stubble, and burn marks were clearly visible in the fields. In the third segment of the tornadoes life, when it turned northeast at a point 5.5 miles east of Oakfield, it's strength diminished rapidly. By the time it "roped out" 1 mile NW of Eden, it's supporting mesocyclone's position on WSR-88D Doppler was about 5 miles to the south! Debris was found east to the Lake Michigan shoreline, and cancelled checks were later found 125 miles E/SE near Muskegon, MI! | |||||||||||
| 22.0 | 1968-08-16 | 2 | 44°15'N / 88°15'W | 2.00 Miles | 100 Yards | 0 | 0 | 25K | 0 | Outagamie | |
| 22.4 | 1964-05-08 | 2 | 44°14'N / 88°25'W | 44°20'N / 88°10'W | 14.00 Miles | 63 Yards | 0 | 0 | 2.5M | 0 | Calumet |
| 23.0 | 1967-06-30 | 2 | 44°02'N / 88°10'W | 44°02'N / 88°02'W | 5.90 Miles | 100 Yards | 0 | 1 | 250K | 0 | Calumet |
| 23.7 | 1984-04-27 | 4 | 44°15'N / 88°32'W | 44°27'N / 88°18'W | 15.50 Miles | 60 Yards | 0 | 9 | 2.5M | 0 | Outagamie |
| 24.9 | 1981-04-04 | 2 | 43°55'N / 88°05'W | 0.10 Mile | 23 Yards | 0 | 6 | 250K | 0 | Calumet | |
| 25.5 | 1970-12-01 | 3 | 44°20'N / 88°39'W | 44°27'N / 88°26'W | 13.10 Miles | 67 Yards | 0 | 0 | 2.5M | 0 | Outagamie |
| 26.4 | 1968-08-19 | 2 | 43°45'N / 88°58'W | 43°45'N / 88°54'W | 2.30 Miles | 50 Yards | 0 | 1 | 25K | 0 | Green Lake |
| 26.7 | 1967-06-30 | 2 | 44°02'N / 88°02'W | 44°02'N / 88°01'W | 0 | 0 | 250K | 0 | Manitowoc | ||
| 26.7 | 1982-05-06 | 2 | 44°22'N / 88°35'W | 44°27'N / 88°28'W | 9.00 Miles | 100 Yards | 0 | 0 | 250K | 0 | Outagamie |
| 28.2 | 1951-06-19 | 2 | 43°37'N / 88°30'W | 1.00 Mile | 467 Yards | 0 | 0 | 25K | 0 | Dodge | |
| 28.4 | 1954-04-15 | 2 | 43°59'N / 89°11'W | 44°03'N / 89°05'W | 5.90 Miles | 33 Yards | 0 | 0 | 25K | 0 | Waushara |
| 28.6 | 1974-04-21 | 3 | 43°33'N / 88°45'W | 43°40'N / 88°20'W | 22.20 Miles | 200 Yards | 0 | 0 | 2.5M | 0 | Dodge |
| 28.9 | 1986-06-11 | 2 | 43°36'N / 88°21'W | 43°42'N / 88°15'W | 8.00 Miles | 100 Yards | 0 | 0 | 250K | 0 | Fond Du Lac |
| 29.2 | 1961-09-22 | 2 | 43°39'N / 88°15'W | 43°47'N / 88°04'W | 12.60 Miles | 300 Yards | 0 | 0 | 25K | 0 | Fond Du Lac |
| 29.2 | 2004-06-23 | 3 | 43°38'N / 88°51'W | 43°38'N / 88°44'W | 7.20 Miles | 400 Yards | 0 | 0 | 6.0M | 700K | Fond Du Lac |
| Brief Description: This tornado was a continuation of the tornado that moved through the southern part of the city of Markesan (Green Lake Co.). It entered Fond du Lac County just south of Lake Maria Road, about 4.7 miles SW of Alto. It moved east-southeast on a line toward Waupun at F3 strength (estimated 175-200 mph), and actually merged with the Lake Maria tornado that moved east out of extreme southeastern Green Lake County. The merger took place just east of a dogleg/bend of Oak Grove Rd., about 2.2 miles SSW of Alto. The civil Town of Alto reported that 19 residential homes had major damage and 1 was destroyed. One business had major damage. Fourteen farms were affected with a tally of 8 ag-buildings/homes with minor damage, 19 with major damage, and 16 destroyed. Crop damage was severe. Public sector damage (roads/bridges) was about $225K. In the city of Waupun (Fond du Lac side), 4 homes had major damage, and roughly 150 had minor roof/siding damage due to severe tree damage. Average path width was about 300 yards. Two rounds of severe weather affected parts of south-central and southeast Wisconsin on June 23rd, with the second round featuring 8 tornadoes, large hail (up to golf-ball size), and powerful straight-line downburst winds. A warm front moving north through the area resulted in favorable vertical wind shear to allow for supercell development. The 1st round of severe weather was due to a broken line of intense thunderstorms moving across Walworth, Milwaukee, Racine and Kenosha counties. Hail of up to 1 inch in diameter and torrential rainfall accompanied these storms before they moved over Lake Michigan and weakened. The 2nd round of severe weather was dominated by 2 cyclic supercells - one moved east/southeast through Marquette, Green Lake, Fond du Lac, and Washington Counties, spinning up 5 separate tornadoes, dumping hail stones up to 3 inches in diameter, and hurricane-force downburst winds. The large hail dented several vehicles. Two of these were rated F3. Refer to the individual tornado reports for more details. A more southerly supercell tracked across extreme southern Sauk County and then made a partial right turn and headed southeast through Dane County, spinning up 2 tornadoes in the process, as well as large hail and downburst winds. One powerful downburst wind in Madison (Dane Co.) blew equipment off the roof of a business at the Midvale Shopping Mall. A semi southwest of Ft. Atkinson was blown over by straight-line wind gusts. This southern supercell eventually spun up another tornado in south-central Jefferson County which moved into north-central Walworth County. Refer to the individual tornado reports for more details. Both supercells had downbursts that generated large hail and powerful, hurricane-force winds north and south of their tracks. Over all of Wisconsin, 16 tornadoes were documented on June 23rd, which is the 4th highest single-day total (record is 24 on May 8, 1988). For south-central and southeast Wisconsin, the 8 tornadoes on June 23rd was tied for the 4th highest single-day total (record is 11 on May 8, 1988). | |||||||||||
| 29.4 | 2004-06-23 | 3 | 43°38'N / 88°51'W | 43°39'N / 88°48'W | 3.60 Miles | 300 Yards | 0 | 0 | 1.6M | 300K | Fond Du Lac |
| Brief Description: This tornado was a continuation of the tornado that moved east from the Lake Maria area of extreme southeastern Green Lake County. It maintained its F3 strength (175-200 mph) and moved east along Marshview Rd, only to merge with the F3 tornado moving east/southeast out of the Markesan area of southeast Green Lake County. The merger took place just east of a dogleg/bend of Oak Grove Rd., about 2.2 miles SSW of Alto. The civil Town of Alto reported that 8 residential homes had major damage. Four farms were affected with a tally of 8 ag-buildings/homes with minor damage, 19 with major damage, and 16 destroyed. Crop damage was severe. Public sector damage (roads/bridges) was about $100K. Average path width was about 275 yards. Two rounds of severe weather affected parts of south-central and southeast Wisconsin on June 23rd, with the second round featuring 8 tornadoes, large hail (up to golf-ball size), and powerful straight-line downburst winds. A warm front moving north through the area resulted in favorable vertical wind shear to allow for supercell development. The 1st round of severe weather was due to a broken line of intense thunderstorms moving across Walworth, Milwaukee, Racine and Kenosha counties. Hail of up to 1 inch in diameter and torrential rainfall accompanied these storms before they moved over Lake Michigan and weakened. The 2nd round of severe weather was dominated by 2 cyclic supercells - one moved east/southeast through Marquette, Green Lake, Fond du Lac, and Washington Counties, spinning up 5 separate tornadoes, dumping hail stones up to 3 inches in diameter, and hurricane-force downburst winds. The large hail dented several vehicles. Two of these were rated F3. Refer to the individual tornado reports for more details. A more southerly supercell tracked across extreme southern Sauk County and then made a partial right turn and headed southeast through Dane County, spinning up 2 tornadoes in the process, as well as large hail and downburst winds. One powerful downburst wind in Madison (Dane Co.) blew equipment off the roof of a business at the Midvale Shopping Mall. A semi southwest of Ft. Atkinson was blown over by straight-line wind gusts. This southern supercell eventually spun up another tornado in south-central Jefferson County which moved into north-central Walworth County. Refer to the individual tornado reports for more details. Both supercells had downbursts that generated large hail and powerful, hurricane-force winds north and south of their tracks. Over all of Wisconsin, 16 tornadoes were documented on June 23rd, which is the 4th highest single-day total (record is 24 on May 8, 1988). For south-central and southeast Wisconsin, the 8 tornadoes on June 23rd was tied for the 4th highest single-day total (record is 11 on May 8, 1988). | |||||||||||
| 29.8 | 2004-06-23 | 3 | 43°38'N / 88°44'W | 43°33'N / 88°25'W | 16.70 Miles | 400 Yards | 0 | 0 | 8.0M | 500K | Dodge |
| Brief Description: This tornado was a continuation of the tornado that moved east-southeast from Markesan (Green Lake Co.) through the southwest corner of Fond du Lac County (civil Town of Alto). In Dodge County it maintained its F3 strength (175-200 mph) as it moved east-southeast through the city of Waupun and through rural areas of northern Dodge County to a point 2 miles southeast of Lomira, where it dissipated just west of U.S. Highway 41. Many homes and vehicles in the Dodge County portion of Waupun were damaged. Toward Lomira, several dozens of agricultural buildings and homes were damage. Numerous trees were uprooted from Waupun to near Lomira, and some crop damage was noted. Estimated damage in Waupun was about $3M, and $2.5M in the civil Towns of Lomira and Le Roy. Average path width was about 300 yards. Two rounds of severe weather affected parts of south-central and southeast Wisconsin on June 23rd, with the second round featuring 8 tornadoes, large hail (up to golf-ball size), and powerful straight-line downburst winds. A warm front moving north through the area resulted in favorable vertical wind shear to allow for supercell development. The 1st round of severe weather was due to a broken line of intense thunderstorms moving across Walworth, Milwaukee, Racine and Kenosha counties. Hail of up to 1 inch in diameter and torrential rainfall accompanied these storms before they moved over Lake Michigan and weakened. The 2nd round of severe weather was dominated by 2 cyclic supercells - one moved east/southeast through Marquette, Green Lake, Fond du Lac, and Washington Counties, spinning up 5 separate tornadoes, dumping hail stones up to 3 inches in diameter, and hurricane-force downburst winds. The large hail dented several vehicles. Two of these were rated F3. Refer to the individual tornado reports for more details. A more southerly supercell tracked across extreme southern Sauk County and then made a partial right turn and headed southeast through Dane County, spinning up 2 tornadoes in the process, as well as large hail and downburst winds. One powerful downburst wind in Madison (Dane Co.) blew equipment off the roof of a business at the Midvale Shopping Mall. A semi southwest of Ft. Atkinson was blown over by straight-line wind gusts. This southern supercell eventually spun up another tornado in south-central Jefferson County which moved into north-central Walworth County. Refer to the individual tornado reports for more details. Both supercells had downbursts that generated large hail and powerful, hurricane-force winds north and south of their tracks. Over all of Wisconsin, 16 tornadoes were documented on June 23rd, which is the 4th highest single-day total (record is 24 on May 8, 1988). For south-central and southeast Wisconsin, the 8 tornadoes on June 23rd was tied for the 4th highest single-day total (record is 11 on May 8, 1988). | |||||||||||
| 30.7 | 1959-05-06 | 2 | 44°28'N / 88°33'W | 0 | 0 | 25K | 0 | Outagamie | |||
| 30.7 | 2004-06-23 | 3 | 43°40'N / 88°57'W | 43°39'N / 88°53'W | 4.00 Miles | 300 Yards | 1 | 1 | 675K | 300K | Green Lake |
| Brief Description: A strong tornado spun up about a mile directly east of Lake Maria in southeastern Green Lake County, or about 4.2 miles SSE of Markesan, moved east along Sunny Drive with F3 strength (estimated 175-200), and exited Green Lake County along Mielke Rd., or about 6.8 miles SE of Markesan. Numerous trees were uprooted. At least 8 homes or ag-buildings had minor damage, at least 5 homes or ag-buildings had major damage, and at least 5 homes or ag-buildings were destroyed. Near the intersection of Sunny Drive and Pleasant Drive, two people and most basement items were "sucked" out of their home's basement while the home was being destroyed. The husband was found dead and his wife was critically injured. Average path width was about 275 yards. M53PH Two rounds of severe weather affected parts of south-central and southeast Wisconsin on June 23rd, with the second round featuring 8 tornadoes, large hail (up to golf-ball size), and powerful straight-line downburst winds. A warm front moving north through the area resulted in favorable vertical wind shear to allow for supercell development. The 1st round of severe weather was due to a broken line of intense thunderstorms moving across Walworth, Milwaukee, Racine and Kenosha counties. Hail of up to 1 inch in diameter and torrential rainfall accompanied these storms before they moved over Lake Michigan and weakened. The 2nd round of severe weather was dominated by 2 cyclic supercells - one moved east/southeast through Marquette, Green Lake, Fond du Lac, and Washington Counties, spinning up 5 separate tornadoes, dumping hail stones up to 3 inches in diameter, and hurricane-force downburst winds. The large hail dented several vehicles. Two of these were rated F3. Refer to the individual tornado reports for more details. A more southerly supercell tracked across extreme southern Sauk County and then made a partial right turn and headed southeast through Dane County, spinning up 2 tornadoes in the process, as well as large hail and downburst winds. One powerful downburst wind in Madison (Dane Co.) blew equipment off the roof of a business at the Midvale Shopping Mall. A semi southwest of Ft. Atkinson was blown over by straight-line wind gusts. This southern supercell eventually spun up another tornado in south-central Jefferson County which moved into north-central Walworth County. Refer to the individual tornado reports for more details. Both supercells had downbursts that generated large hail and powerful, hurricane-force winds north and south of their tracks. Over all of Wisconsin, 16 tornadoes were documented on June 23rd, which is the 4th highest single-day total (record is 24 on May 8, 1988). For south-central and southeast Wisconsin, the 8 tornadoes on June 23rd was tied for the 4th highest single-day total (record is 11 on May 8, 1988). | |||||||||||
| 30.8 | 1974-04-21 | 3 | 43°36'N / 88°24'W | 43°39'N / 88°10'W | 11.90 Miles | 200 Yards | 1 | 5 | 2.5M | 0 | Fond Du Lac |
| 30.9 | 2004-06-23 | 3 | 43°43'N / 89°02'W | 43°39'N / 88°54'W | 9.40 Miles | 400 Yards | 0 | 0 | 1.4M | 500K | Green Lake |
| Brief Description: A strong tornado spun up near the intersection of STH 73 and CTH H, about 2 miles north of the village of Manchester. It increased its strength to F3 (estimated 175-200 mph) as it moved southeast across the southern part of the city of Markesan. Numerous trees were uprooted. At least 18 homes or ag-buildings had minor damage, at least 9 homes or ag-buildings had major damage, and at least 21 homes or ag-buildings were destroyed. This tornado exited Green Lake County at a point 6.4 miles southeast of Markesan, just south of Lake Maria Rd., and continued southeast through Fond du Lac County. The responsible supercell also spun up different tornadoes earlier in Adams and Marquette Counties. Newspaper headline: "A Day Like No Other." Average path width was about 350 yards. Two rounds of severe weather affected parts of south-central and southeast Wisconsin on June 23rd, with the second round featuring 8 tornadoes, large hail (up to golf-ball size), and powerful straight-line downburst winds. A warm front moving north through the area resulted in favorable vertical wind shear to allow for supercell development. The 1st round of severe weather was due to a broken line of intense thunderstorms moving across Walworth, Milwaukee, Racine and Kenosha counties. Hail of up to 1 inch in diameter and torrential rainfall accompanied these storms before they moved over Lake Michigan and weakened. The 2nd round of severe weather was dominated by 2 cyclic supercells - one moved east/southeast through Marquette, Green Lake, Fond du Lac, and Washington Counties, spinning up 5 separate tornadoes, dumping hail stones up to 3 inches in diameter, and hurricane-force downburst winds. The large hail dented several vehicles. Two of these were rated F3. Refer to the individual tornado reports for more details. A more southerly supercell tracked across extreme southern Sauk County and then made a partial right turn and headed southeast through Dane County, spinning up 2 tornadoes in the process, as well as large hail and downburst winds. One powerful downburst wind in Madison (Dane Co.) blew equipment off the roof of a business at the Midvale Shopping Mall. A semi southwest of Ft. Atkinson was blown over by straight-line wind gusts. This southern supercell eventually spun up another tornado in south-central Jefferson County which moved into north-central Walworth County. Refer to the individual tornado reports for more details. Both supercells had downbursts that generated large hail and powerful, hurricane-force winds north and south of their tracks. Over all of Wisconsin, 16 tornadoes were documented on June 23rd, which is the 4th highest single-day total (record is 24 on May 8, 1988). For south-central and southeast Wisconsin, the 8 tornadoes on June 23rd was tied for the 4th highest single-day total (record is 11 on May 8, 1988). | |||||||||||
| 31.6 | 1984-06-08 | 3 | 43°38'N / 88°58'W | 43°43'N / 88°59'W | 6.00 Miles | 200 Yards | 0 | 0 | 2.5M | 0 | Green Lake |
| 32.2 | 2004-06-23 | 2 | 44°16'N / 89°11'W | 44°16'N / 89°03'W | 7.50 Miles | 125 Yards | 0 | 0 | 915K | 0 | Waupaca |
| Brief Description: Thunderstorms that developed ahead of a strong cold front that moved through Wisconsin produced severe weather in the central and east central parts of the state during the evening. A line of thunderstorms tore the roof from a barn, downed numerous trees and power lines and blew a pickup truck into a ditch as the storms moved through the Wood county communities of Vesper, Nekoosa, and Wisconsin Rapids. Glass fragments caused a minor injury to one of the occupants of the pickup truck. The storms also produced 7 minutes of dime size hail 1 mile east of Wisconsin Rapids. The storms also damaged several buildings 4 miles west of Stevens Point (Portage co.), downed trees in Saxeville (Waushara co.) and dropped quarter size hail in Plover (Portage co.). As the storms moved through Portage county three tornadoes touched down. One of the tornadoes caused minor tree damage in an industrial park in Whiting. Eyewitnesses observed water being sucked out of a pond at the same time as doors to an office were sucked open. Another tornado downed several trees, knocked down a fence, damaged the roof of a house and damaged some outbuildings as it passed north of Almond. The third tornado was the strongest and was on the ground intermittently for 10 miles from southeast Portage county into southwest Waupaca county. It downed trees and overturned an irrigation system in Portage county. It strengthened in Waupaca county where it scoured asphalt off a road, destroyed a barn, sheared off the top 50 feet of a silo, crushing three calves, damaged a sheet metal outbuilding and killed 3 sheep. It tore the roof from a house and destroyed the garage, overturned a semi trailer and moved it 50 feet, blew hay wagons against trees and snapped off or uprooted numerous trees. Some of the debris from this tornado landed several miles east in the Fremont area (Waupaca co.). A tornado touched down in at least four locations from Little Chute to Kaukauna as the storms moved across Outagamie county. It toppled or twisted large trees, ripped parts of the roofs from residential and commercial buildings, destroyed storage sheds and an old barn and overturned semi trailers and dropped some of them on other vehicles. A brief tornado touchdown also occurred on the west side of Green Bay (Brown co.) where it caused some tree damage. | |||||||||||
| 32.6 | 1974-04-21 | 3 | 43°30'N / 88°45'W | 43°36'N / 88°24'W | 18.60 Miles | 200 Yards | 0 | 6 | 2.5M | 0 | Dodge |
| 32.8 | 1957-04-19 | 2 | 44°04'N / 89°24'W | 44°14'N / 89°00'W | 22.80 Miles | 50 Yards | 0 | 1 | 25K | 0 | Waushara |
| 33.8 | 1980-06-07 | 2 | 44°04'N / 87°53'W | 0.20 Mile | 33 Yards | 0 | 0 | 250K | 0 | Manitowoc | |
| 34.8 | 1951-09-26 | 4 | 44°22'N / 89°13'W | 44°28'N / 88°47'W | 22.30 Miles | 100 Yards | 6 | 3 | 250K | 0 | Waupaca |
| 34.9 | 1992-08-29 | 3 | 44°04'N / 89°31'W | 44°08'N / 89°00'W | 28.00 Miles | 800 Yards | 1 | 30 | 25.0M | 0 | Waushara |
| 35.3 | 1974-04-21 | 3 | 43°39'N / 88°10'W | 43°54'N / 87°43'W | 28.10 Miles | 200 Yards | 1 | 7 | 2.5M | 0 | Sheboygan |
| 35.6 | 1978-06-17 | 2 | 43°30'N / 88°46'W | 43°31'N / 88°26'W | 16.50 Miles | 33 Yards | 0 | 0 | 2.5M | 0 | Dodge |
| 36.5 | 1959-05-06 | 2 | 44°31'N / 88°52'W | 44°32'N / 88°43'W | 7.20 Miles | 1760 Yards | 0 | 0 | 0K | 0 | Waupaca |
| 36.7 | 1977-06-05 | 3 | 43°39'N / 88°42'W | 43°20'N / 88°26'W | 25.40 Miles | 400 Yards | 0 | 6 | 2.5M | 0 | Dodge |
| 37.5 | 1969-06-26 | 3 | 44°30'N / 88°24'W | 44°35'N / 88°17'W | 7.70 Miles | 100 Yards | 0 | 1 | 2.5M | 0 | Outagamie |
| 39.6 | 1980-04-07 | 2 | 43°28'N / 88°57'W | 43°30'N / 88°43'W | 11.50 Miles | 70 Yards | 0 | 16 | 2.5M | 0 | Dodge |
| 39.9 | 1959-07-08 | 2 | 43°53'N / 89°24'W | 43°56'N / 89°18'W | 5.20 Miles | 50 Yards | 0 | 0 | 25K | 0 | Marquette |
| 40.4 | 1984-06-08 | 2 | 43°26'N / 88°56'W | 43°30'N / 88°42'W | 11.00 Miles | 50 Yards | 0 | 1 | 2.5M | 0 | Dodge |
| 40.6 | 1980-04-07 | 2 | 43°26'N / 88°27'W | 43°27'N / 88°25'W | 0 | 0 | 250K | 0 | Dodge | ||
| 40.9 | 1980-04-07 | 2 | 43°27'N / 88°25'W | 43°27'N / 88°17'W | 6.10 Miles | 33 Yards | 0 | 2 | 250K | 0 | Washington |
| 41.2 | 1951-09-26 | 4 | 44°20'N / 89°18'W | 44°22'N / 89°13'W | 4.10 Miles | 100 Yards | 0 | 0 | 250K | 0 | Portage |
| 41.4 | 1970-04-22 | 2 | 44°28'N / 88°04'W | 44°31'N / 88°01'W | 3.60 Miles | 800 Yards | 0 | 2 | 250K | 0 | Brown |
| 42.3 | 1994-07-05 | 2 | 44°18'N / 87°48'W | 1.00 Mile | 150 Yards | 0 | 0 | 500K | 50K | Manitowoc | |
| 42.3 | 1980-04-07 | 3 | 43°29'N / 88°58'W | 1.20 Miles | 67 Yards | 0 | 4 | 250K | 0 | Dodge | |
| 42.5 | 1964-05-08 | 2 | 44°35'N / 88°51'W | 44°38'N / 88°48'W | 3.30 Miles | 200 Yards | 0 | 1 | 250K | 0 | Waupaca |
| 42.7 | 1984-06-08 | 3 | 43°27'N / 89°14'W | 43°38'N / 88°58'W | 23.00 Miles | 200 Yards | 0 | 1 | 2.5M | 0 | Columbia |
| 42.7 | 1994-07-05 | 4 | 44°17'N / 87°49'W | 44°19'N / 87°46'W | 3.50 Miles | 150 Yards | 0 | 2 | 5.0M | 500K | Manitowoc |
| 42.7 | 1968-08-16 | 2 | 44°36'N / 88°15'W | 1.00 Mile | 100 Yards | 0 | 1 | 25K | 0 | Brown | |
| 42.9 | 1959-05-10 | 2 | 44°29'N / 88°03'W | 44°31'N / 87°58'W | 4.30 Miles | 33 Yards | 0 | 3 | 2.5M | 0 | Brown |
| 43.1 | 1980-04-07 | 2 | 43°21'N / 88°47'W | 43°28'N / 88°39'W | 10.20 Miles | 50 Yards | 0 | 0 | 250K | 0 | Dodge |
| 43.1 | 1970-04-22 | 2 | 44°27'N / 88°02'W | 44°33'N / 87°58'W | 7.20 Miles | 800 Yards | 0 | 1 | 250K | 0 | Brown |
| 43.5 | 2004-06-23 | 2 | 43°49'N / 89°29'W | 43°46'N / 89°16'W | 11.00 Miles | 200 Yards | 0 | 0 | 1.0M | 500K | Marquette |
| Brief Description: A strong tornado spun up about a half-mile east of Interstate 39/STH 51, near the intersection of Fawn Ct. and CTH M, or 3.5 NNW of Packwaukee. This tornado increased to F2 strength (estimated 140-150 mph) as it tore east/southeast through the southern part of Montello. Numerous trees were uprooted. Four homes were destroyed, 25 sustained major damage, and 142 had minor damage. In addition, 9 agricultural buildings were damaged or destroyed. The tornado ended in a swampy, Fox River bottom-land area about 4 miles southeast of Montello (1 mile short of the county line and south of CTH C and east STH 22). The responsible supercell also spun up a different tornado earlier in Adams County. Prop damage estimated at $1.0 M. Average path width was about 175 yards. Two rounds of severe weather affected parts of south-central and southeast Wisconsin on June 23rd, with the second round featuring 8 tornadoes, large hail (up to golf-ball size), and powerful straight-line downburst winds. A warm front moving north through the area resulted in favorable vertical wind shear to allow for supercell development. The 1st round of severe weather was due to a broken line of intense thunderstorms moving across Walworth, Milwaukee, Racine and Kenosha counties. Hail of up to 1 inch in diameter and torrential rainfall accompanied these storms before they moved over Lake Michigan and weakened. The 2nd round of severe weather was dominated by 2 cyclic supercells - one moved east/southeast through Marquette, Green Lake, Fond du Lac, and Washington Counties, spinning up 5 separate tornadoes, dumping hail stones up to 3 inches in diameter, and hurricane-force downburst winds. The large hail dented several vehicles. Two of these were rated F3. Refer to the individual tornado reports for more details. A more southerly supercell tracked across extreme southern Sauk County and then made a partial right turn and headed southeast through Dane County, spinning up 2 tornadoes in the process, as well as large hail and downburst winds. One powerful downburst wind in Madison (Dane Co.) blew equipment off the roof of a business at the Midvale Shopping Mall. A semi southwest of Ft. Atkinson was blown over by straight-line wind gusts. This southern supercell eventually spun up another tornado in south-central Jefferson County which moved into north-central Walworth County. Refer to the individual tornado reports for more details. Both supercells had downbursts that generated large hail and powerful, hurricane-force winds north and south of their tracks. Over all of Wisconsin, 16 tornadoes were documented on June 23rd, which is the 4th highest single-day total (record is 24 on May 8, 1988). For south-central and southeast Wisconsin, the 8 tornadoes on June 23rd was tied for the 4th highest single-day total (record is 11 on May 8, 1988). | |||||||||||
| 44.2 | 2000-06-01 | 2 | 43°24'N / 88°38'W | 43°22'N / 88°24'W | 14.90 Miles | 125 Yards | 0 | 0 | 1.1M | 400K | Dodge |
| Brief Description: One would be hard pressed to find another day like June 1, 2000 in terms of depth and range of severe, convective weather events across south-central and southeast Wisconsin. Tornadoes, widespread and localized flash flooding, funnel clouds, damaging hurricane-force, straight-line winds associated with a wicked squall-line, large hail stones, urban/small flooding, lightning strikes, and significant mainstem river flooding were reported. As in the preceding weeks, a quasi-stationary front over northern Illinois served as a boundary for warm, moist, unstable air to be pulled north over the cooler air over Wisconsin. Leftover flooding (from the evening of May 31, 2000) and isolated severe thunderstorms were noted during the pre-dawn to mid morning hours. However a powerful squall-line formed along the Mississippi River in the La Crosse area by mid-afternoon, and pushed into south-central Wisconsin by late afternoon with "all hell breaking loose." After the squall line moved into the southeast part of the state, it was followed by widespread showers and thunderstorms that triggered additional flooding problems. The east/southeast moving storms would not end until around 2300CST. As a result of the wild weather events, a State of Emergency was declared in Columbia, Dane, Dodge, Green, Iowa, Lafayette, Rock, and Sauk counties. Numerous power lines were knocked down by felled trees or wind gusts outright, resulting in the lose of power to 20,000 customers. Significant storm and flooding events will be summarized below county by county. Marquette Co: 6 homes were damaged and trees uprooted by powerful winds estimated at 70 knots (80 mph) in Briggsville. Urban flooding in Briggsville was also noted with water 6 inches deep. Green Lake Co: powerful winds knocked down trees in both Kingston and Markesan, and large hail was noted. Fond du Lac Co: a brief, F0 tornado spun up in the rural area southeast of Oak Center. Only some hay crop was damaged. Elsewhere, urban flooding and large hail was noted. Between 1700 and 1900CST, 1.71 inches of rain fell in the city of Fond du Lac. Sheboygan Co: powerful thunderstorm winds pushed over trees in the southern portions. Sauk Co: powerful winds blew over large trees in the Reedsburg to Baraboo area as well as around Prairie du Sac. Then the heavens oped up as 3.75 inches of rain fell between 1600 and 1645CST in North Freedom. There were other reports of up to 6 inches of rain falling in 2 hours. Flash flooding developed along Narrows Creek which left mud marks 8 feet high on some buildings. So much water came down Narrows Creek that it temporarily backed up the water of the Baraboo River! The Baraboo River flooded homes, and other creeks tore pieces of Highways 12 and 113 away. Road beds and parking lots were ripped away on the south side of Baraboo. Some railroad beds and many drainage culverts across the county were washed away. Severe erosion was noted on the cliffs overlooking the north shore of Devils Lake, whose water level rose about 3 feet due to runoff. All together, 153 residential homes were damaged, 17 businesses reported water damage, and 220,000 acres of farm land sustained water or erosion damage. The flooding was more widespread and worse than the 1993 flood, based on newspaper accounts. The Baraboo River near Baraboo crested at 22.04 feet on June 2nd, or 6.04 feet above flood stage (moderate flooding), after rising above flood stage at 0400CST on the 1st. Upriver at Rock Springs, the flood stage of 18.5 feet was exceeded at 1630CST on the 1st, and the crest was 21.71 feet at 0750CST on the 2nd (major flooding). Columbia Co: powerful winds uprooted large trees in and around Portage. In addition, a garage was damaged, several vehicles were blown into roadside ditches quickly reached a depth of 1 to 3 feet over portions of Highway 12 around Portage, and on Highway 73 in the southeast corner where residents were evacuated. Gravel road shoulder and culvert washouts were reported on some roads. Agricultural crop damage and soil erosion were also noted. Dodge Co: the main event was a long-lived tornado that spun up just south of Highway S about 4 miles south of Horicon, just southwest of the intersection of Highways S and E. Eyewitness accounts suggested that this tornado was a rain-wrapped and multi-vortex as it hopped-skipped east/southeast through the heart of the village of Iron Ridge (F2 at this time, 140-50 mph wind), before exiting the county on Highway S. All together, this F2 tornado destroyed 6 homes, and damaged 26 other homes, 6 businesses, 2 barns, 1 silo, semi-tractor trailer, a green house, and many cars. It destroyed 5 agricultural buildings. No one was injured or killed by this early-warned tornado. Five other barns were damaged in the county by the powerful straight-line winds associated with the squall-line. In addition, large hail up to walnut size was noted. Flash flooding was reported in the southeast part of the county when 1.5 inches of rain fell in a short period of time. Soil erosion and shoulder washouts were reported near the intersection of Highways 60 and P, south of Rubicon. Washington Co: the Dodge County tornado continued into Washington County for about 1.5 miles near and along Highway S. It damaged a barn and silo and uprooted more trees before dissipating. The tornado in this county had winds estimated at 80 mph, or F1 strength. No one was injured or killed. Flash flooding was reported south of Hartford where soil erosion and gravel shoulder washouts occurred due to swirling flood waters. Otherwise, large hail and tree-uprooting winds were noted in Germantown. Iowa Co: Pre-dawn flash flooding occurred across the northern portion of Iowa County due to leftover thunderstorms that hit the county on May 31st. Morrey Creek overflowed it banks in the village of Avoca, damaging 35 homes and eroding surrounding landscaping. In Dodge State Park near Dodgeville, 50 miles of trails were closed after several bridges were washed out by flooding waters. In addition, gravel road shoulder and culvert washouts were noted on several roads. Another round of flash flooding occurred across the northern portion of the county thanks to torrential rains of 2 to 4 inches in 1 to 2 hours in the late afternoon and early evening hours. An estimated 10,250 acres sustained major soil erosion and many roads had water depths of 1 to 3 feet as water currents washed away gravel shoulders. Crop damage was extensive. Dane Co: pre-dawn severe storms dumped large hail and knocked down many tree limbs in the Madison area. During the same storm, lightning struck a west-side Madison hotel, resulting in damage to its electrical system. Urban/small stream flooding was noted in the pre-dawn hours across the northern part of the county with water covering low spots on Highways 12, 73, and 113. A couple streets were flooded and closed in the village of Mazomanie due to high water levels on the Black Earth Creek. Sandbagging was needed to protect about a dozen homes in Mazomanie. Powerful thunderstorm winds uprooted trees which then damaged many vehicles in the Madison to Cottage Grove area during the evening. At least 60 trees blocked various roads in the Madison area, and 18 power lines were reported down. Roof tiles were also removed from some homes as the winds gusted to an estimated 70 knots (80 mph). An expensive gazebo was destroyed by uprooted trees in the city of Monona. Shortly thereafter, flash-flood producing rains hit much of the county. Madison streets were rivers as 27 cars were stranded or pushed around. It was the worst flooding the city during the past 15 years. Sandbagging commenced in Monona to protect homes. Many roads across the county were damaged by flood waters, with most damage in the northwest part of the county. In the village of Oregon, 1.90 inches of rain was measured in just 45 minutes ending at 1830CST. Additional soil erosion and ponding of water resulted in extensive, severe crop damage across the county. Collectively, wind and/or flood damage occurred to at least 646 residential homes in the county, and to 3 businesses. Probably 30,000 acres of farm land had significant crop damage. A new daily rainfall record of 3.46 inches was set at Madison's Traux Field, breaking the old record of 1.33 inches set back in 1892. Runoff from this rainfall eventually pushed Lake Mendota to 31.5 inches above its normal summer level on June 5th, which was the highest reading since the beginning of records in 1916. In response to the high lake levels in Dane county, many nearby homes were sandbagged, and public beach and boat docks were closed. Jefferson Co: an early morning, severe thunderstorm dumped large hail on Lake Mills. Another storm's lightning struck a Ft. Atkinson church steeple, resulting in structural and water damage. The evening storms generated damaging winds that uprooted large trees. Lightning started a minor fire on a Lake Mills home's roof. Heavy rains of 2 to 3 inches during the evening generated scattered flash flooding across the county, mostly in the form of gravel shoulder washouts of several roads. Roads near the Rock River in Ft. Atkinson were closed due to the swirling waters. Soil erosion and crop washouts were noted across the county. Rainfall totals of 2.39 inches and 2.72 inches were noted in Ft. Atkinson and Jefferson, respectively. The heavy rains forced the Crawfish River at Milford to exceed the flood stage of 7 feet on June 2nd , and crest at 8.38 feet on June 7th (moderate flooding). Waukesha Co: powerful thunderstorm winds uprooted trees in the Genesee area. Milwaukee Co: large hail was reported in the city of Milwaukee. Torrential rains of around 2 inches in 1 to 2 hours in the city of Fox Point resulted in flash flooding in that city. Landscaping damage and some road damage was noted due to swift water currents. Lafayette Co: a brief tornado occurred north of Calamine. It damaged 2 large pole sheds and uprooted many trees along its short path. Several calves were injured as they were pushed across the road. Eyewitness accounts suggest this F1 tornado (winds about 100 mph) was rain-wrapped. Otherwise, the squall line's powerful winds uprooted trees and over-turned a car-trailer combo east of Belmont. Similar to other counties, flash-flood producing rains followed the winds. Across the county, all mainstem river, stream, creeks, and other low spots experienced flash flooding. Bridge under-cutting was noted on Highway K outside of Gratiot, on Highway H in Jenkynsville, and Highway G in the northwest corner. Moderate to severe damage to road shoulders and washed out driveways was noted countywide. Twenty-one roads were closed at one time or another. At least 75 residential homes and 5 businesses reported flood damage, while 2 private utility buildings suffered damage. Two farm buildings were destroyed by the flood waters, and 15 others damaged. About 7000 acres of farm land were severely damaged. The Pecatonica River in Darlington closed down Highway 23 from the south. The river at this location exceeded the flood stage of 11 feet late on May 31st, and crested at 15.77 feet at 0730CST on June 1st (moderate flooding). Near South Wayne, lightning started a minor house fire. Green Co: pre-dawn and morning urban/small stream flooding occurred countywide due to rainfall that started on May 31st. The rains ended by sunrise. Up to 5 inches of rain fell overnight in the southwest part of the county. Many streams were 5 to 10 feet wide, resulting in water covering low-lying roads to a depth of 1 foot. Several cars were swept into roadside ditches. Urban basements had minor flood damage. Additional heavy rains followed the evening squall line which resulted in a new round of flash flooding across much of the county. Eight miles of the 24 mile long Sugar River State Trail were closed from near Monticello to near Albany due to washed out bridges and undercut paths. Five homes sustained significant damage. Numerous roads were closed due to high water levels and dozens of vehicles were stranded or pushed into roadside ditches. Gravel road shoulder and culvert washouts were noted countywide. Water levels in the city of Brodhead were the highest in many years. Legion Park in Albany was closed after the adjacent Sugar River exceeded flood stage. Moderate to severe soil erosion was noted to 5000 acres of farm fields. The Pecatonica River at Martintown exceeded the flood stage of 13.5 feet at 0000CST on June 1st, and crested at 18.51 feet on June 4th (moderate flooding). Rock Co: powerful thunderstorm winds downed large trees in scattered parts of the county. However, flash-flood producing rains hit during the evening hours. Most mainstem and nearly all streams and creeks jumped their banks. Nine roads along Lake Koshkonong sustained washout damage due to swift water currents. At least 100 homes outside of the major cities sustained damage. Many Beloit and Janesville homes in low spots reported landscape flood damage as well as basement flooding. Flash flood waters also tore through farm fields, leaving moderate to severe soil erosion and crop damage to at least 20,000 acres. Flood waters from the Sugar River in the southwest corner of the county closed roads west of the village of Avon. Walworth Co: no damage reports. Kenosha Co: several rounds of heavy rains during the evening on top of previously saturated soils and high river levels resulted in flash flooding scattered across the county. Several roads had fast-flowing waters 1 to 3 feet deep which resulted in shoulder washouts and cars being swept into roadside ditches. At least 75 homes sustained significant flood damage in the Wheatland, Salem, and Silver Lake areas. About 47,000 acres of farm land had serious soil erosion, and washed or flooded crops. Due to rainfall totals during the evening of 2 to 3 inches, the Fox River at New Munster continued to rise and would eventually crest at 12.76 feet early on June 3rd, or 2.76 feet above flood stage. Three homes Silver Lake homes were evacuated. | |||||||||||
| 44.5 | 1981-04-04 | 4 | 43°26'N / 88°12'W | 1.80 Miles | 100 Yards | 3 | 53 | 25.0M | 0 | Washington | |
| 44.8 | 1984-04-27 | 3 | 44°32'N / 88°55'W | 44°43'N / 88°53'W | 8.00 Miles | 43 Yards | 0 | 0 | 2.5M | 0 | Waupaca |
| 45.0 | 1969-06-26 | 3 | 44°35'N / 88°17'W | 44°41'N / 88°12'W | 7.60 Miles | 100 Yards | 0 | 0 | 2.5M | 0 | Shawano |
| 45.1 | 1955-07-31 | 2 | 43°58'N / 89°30'W | 43°57'N / 89°26'W | 2.70 Miles | 50 Yards | 0 | 0 | 250K | 0 | Marquette |
| 46.3 | 1976-06-12 | 2 | 44°27'N / 89°17'W | 0.20 Mile | 50 Yards | 0 | 0 | 25K | 0 | Portage | |
| 46.8 | 2008-06-07 | 2 | 43°31'N / 89°15'W | 43°30'N / 89°06'W | 9.00 Miles | 3520 Yards | 0 | 6 | 2.5M | 500K | Columbia |
| Brief Description: EVENT NARRATIVE: This tornado was extremely wide since the thunderstorm cloud base was very low and the meso-cyclone that is usually aloft was well-formed all the way to the ground. Within a broad 1 to 2 mile wide area of EF0 to EF1 damage, there were several small swaths of EF2 damage due to multiple votices. The accompanying graphic shows this effect. With respect to residential homes this tornado resulted in very minor damage to 150, minor damage to 30, major damage to 10, and 2 were destroyed (total residential damage of $2 million). With respect to agricultural buildings ($500K in total damage), this tornado resulted in minor damage to 20, and major damage to 2 buildings (inlcuding silos). Tens of thousands of trees were uprooted or chewed-up, and many power-lines and power-poles were either toppled or damaged. About 4000 to 6000 trees on a tree farm were destroyed at a location about 3 miles east-southeast of Pardeeville. This tree-farm loss was treated as a crop loss. Additionally, some corn and soybean crops were damaged. This tornado started just southeast of the intersection of CTH P and Pardeeville Road, and moved southeastward for about 4 miles and then traveled east-southeast to end just northeast of the western intersection of STH 146 and CTH A. The specific starting point and ending point lat/long numbers were 43.53333/-89.26306 and 43.49556/-89.09878, respectively. Additional mid-point pairs of number include: 43.51603/-8922394, 43.50728/-89.20151, and 43.50208/-89.17679. DI#24 (ELT), DOD4. The wind speeds were estimated at about 120 mph. Average path length was about 1760 yards (1 mile). EPISODE NARRATIVE: A slow-moving surface boundary, nearly parallel with the mid-level flow affected southern Wisconsin during the period of June 7th through June 9th. A strengthening low-level jet and strong moisture advection produced several rounds of thunderstorms during the period in the vicinity of this boundary. The atmosphere was very moist with precipitable water values around 2 inches. Low to mid-level wind flow supported training of flood-producing thunderstorms. There was sufficient vertical wind shear to allow for supercell development that resulted in 10 tornadoes spinning up in south-central and southeast Wisconsin on June 7th. A weak cool front pushed through southern Wisconsin late on the 8th/early on the 9th, finally ending the heavy rainfall. During the evening of June 7th, several roads near STH 89 south of Columbus were washed out. STH 16 east of Columbus closed on June 8th due to high waters. A state-of-emergency was declared in Milwaukee County the evening of June 7th due to widespread flash flooding, and Milwaukee Mitchell Field was close for several hours due to high water levels. | |||||||||||
| 47.0 | 1951-09-26 | 4 | 43°28'N / 89°15'W | 43°32'N / 89°05'W | 9.00 Miles | 100 Yards | 1 | 9 | 250K | 0 | Columbia |
| 47.1 | 1968-07-21 | 2 | 43°22'N / 88°18'W | 2.00 Miles | 100 Yards | 0 | 0 | 25K | 0 | Washington | |
| 47.6 | 1963-06-08 | 2 | 43°21'N / 88°36'W | 43°19'N / 88°31'W | 4.10 Miles | 33 Yards | 0 | 0 | 250K | 0 | Dodge |
| 47.7 | 1970-12-01 | 2 | 44°32'N / 89°13'W | 44°47'N / 88°40'W | 31.90 Miles | 200 Yards | 0 | 0 | 250K | 0 | Waupaca |
| 48.9 | 1956-04-03 | 2 | 44°15'N / 89°31'W | 44°29'N / 89°20'W | 18.20 Miles | 100 Yards | 2 | 2 | 250K | 0 | Portage |
* The information on this page is based on the global volcano database, the U.S. earthquake database of 1638-1985, and the U.S. Tornado and Weather Extremes database of 1950-2010.