Baltimore County Public Schools Natural Disasters and Weather Extremes
Hot Rankings
The chance of earthquake damage in Baltimore County Public Schools is about the same as Maryland average and is much lower than the national average. The risk of tornado damage in Baltimore County Public Schools is higher than Maryland average and is about the same as the national average.
Earthquake Index, #3
| Baltimore County Public Schools | 0.21 |
| Maryland | 0.17 |
| 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
| Baltimore County Public Schools | 0.0000 |
| Maryland | 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, #8
| Baltimore County Public Schools | 140.42 |
| Maryland | 121.90 |
| 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 4,940 other weather extremes events within 50 miles of Baltimore County Public Schools 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: | 7 | Cold: | 42 | Dense Fog: | 23 | Drought: | 31 |
| Dust Storm: | 0 | Flood: | 674 | Hail: | 724 | Heat: | 77 | Heavy Snow: | 74 |
| High Surf: | 0 | Hurricane: | 3 | Ice Storm: | 23 | Landslide: | 0 | Strong Wind: | 106 |
| Thunderstorm Winds: | 2,398 | Tropical Storm: | 8 | Wildfire: | 3 | Winter Storm: | 105 | Winter Weather: | 89 |
| Other: | 553 | ||||||||
Volcanos Nearby
No volcano is found in or near Baltimore County Public Schools.
Historical Earthquake Events
A total of 1 historical earthquake event that had a recorded magnitude of 3.5 or above found in or near Baltimore County Public Schools.
| Distance (miles) | Date | Magnitude | Depth (km) | Latitude | Longitude |
| 40.0 | 1984-04-23 | 4.4 | 5 | 39.92 | -76.36 |
Historical Tornado Events
A total of 48 historical tornado events that had recorded magnitude of 2 or above found in or near Baltimore County Public Schools.
| Distance (miles) | Date | Magnitude | Start Lat/Log | End Lat/Log | Length | Width | Fatalities | Injuries | Property Damage | Crop Damage | Affected County |
| 3.0 | 1973-06-16 | 2 | 39°20'N / 76°35'W | 0 | 4 | 25K | 0 | Baltimore | |||
| 11.3 | 1961-06-09 | 3 | 39°12'N / 76°37'W | 39°13'N / 76°36'W | 0 | 0 | 250K | 0 | Anne Arundel | ||
| 11.4 | 1979-09-05 | 2 | 39°27'N / 76°25'W | 0.50 Mile | 20 Yards | 0 | 0 | 250K | 0 | Baltimore | |
| 13.0 | 1990-10-18 | 2 | 39°28'N / 76°49'W | 0.10 Mile | 100 Yards | 0 | 59 | 25.0M | 0 | Baltimore | |
| 18.8 | 2001-09-24 | 2 | 39°08'N / 76°53'W | 39°14'N / 76°50'W | 6.00 Miles | 100 Yards | 0 | 0 | 1.0M | 0 | Howard |
| Brief Description: A tornado crossed into Howard County from Laurel and remained on the ground until it dissipated about 1 mile east of Columbia. Several townhomes in North Laurel were damaged and trees were downed along the remainder of its path. Severe thunderstorms moved through Central Maryland during the early evening of the 24th. One thunderstorm produced a devastating F3 tornado which was on the ground for 17.5 miles from College Park in Prince George's County to just east of Columbia in Howard County. Multiple vortices were reported with the tornado at times. The tornado first touched down in Northwest Branch Stream Valley Park just west of Hyattsville. It rapidly strengthened to an F3 tornado with winds up to 200 MPH. The damage path ranged in width from 100 to 200 yards. The tornado crossed the intersection of Adelphi Road and University Boulevard into the western campus of the University of Maryland. Ten trailers being used as a temporary office for the Maryland Fire and Rescue Institute were completely destroyed by the twister. Debris from the trailers such as video tapes and pieces of paper were found up to 60 miles away in Northern Baltimore and Harford Counties in addition to extreme southeast Pennsylvania. Four of the six people inside the trailers were injured, one seriously. One staff member was thrown free of the destruction and was found in a dumpster nearby. Another person dug their hands into the carpet and held on as their feet were being pulled up in the air by the tornado. The other four occupants, including one child, took shelter under desks and survived. Two University of Maryland students who were visiting their father who worked in the trailers left by car shortly before the tornado hit. The two sisters, ages 20 and 23, were killed when the tornado picked up their car outside of Denton Hall and threw it either around or over an eight-story dorm. They died instantly when their car crashed into a wooded area 300 yards from the road. Most of the other buildings on the campus in the path of the storm were made of brick and suffered only minor to moderate damage, such as Denton Hall Dormitory, Easton Hall Dormitory and Dining Hall, and the President's Mansion. A parking lot outside of Denton Hall full of cars was also hit by the tornado. At least 200 vehicles in the parking lot were damaged, including at least 100 that were blown into and onto other vehicles. At least twenty cars were totaled and one car was partially ripped apart. The woods behind the parking lot were nearly flattened. The bubble roof of the football practice facility near Byrd Stadium was removed. Forty-eight people on campus, including 25 students, were injured by flying debris as the twister downed trees and ripped pieces of siding and roofing off buildings. In addition, residential areas near the campus, including the University Courtyard Apartments sustained damage. A total of 3000 students were left temporarily homeless after two dorms and an off-campus housing unit were evacuated due to storm damage. During the recovery effort, a 78-year-old firefighter who responded to the tragedy at the University died of a heart attack shortly after returning from the scene. The tornado moved north-northeast off the campus and crossed University Boulevard at the intersection of Metzerott Road. The steeple of a church was removed and cars were flipped near the intersection. Power lines and trees were also downed. The twister continued through Paint Branch Stream Valley Park where it downed numerous trees. The tornado weakened to F2 strength before it crossed Interstate 95/495 just west of the Route 1 interchange. It was remarkable that even though the highway was filled with bumper to bumper rush hour traffic, the only damage reported was a flipped tractor trailer. The next area hit by the tornado was the community of Cherry Hill. Several trees and power lines were downed onto roads and houses just west of Baltimore Avenue, including the Chestnut Hills subdivision. Several businesses along Route 1 sustained minor damage, and three additional buildings lost portions of their roofs. Three employees of a business in the Chestnut Hills Shopping Center were injured by flying glass after the windows on the front of the store were shattered. The tornado moved across the National Agricultural Research Center and caused over $40 million dollars in damage. Thirty greenhouses were damaged and several long term studies inside were destroyed. Fifteen other buildings west of Route 1 suffered minor to moderate damage. Numerous trees, including a row of historic willow oaks, were downed. Over 65 vehicles in the employee parking lot were damaged by flying debris. Eleven of these vehicles were totaled. Just north of the research center, "stunning" tree and power line damage was reported at the intersection of Sellman and Montgomery Roads. The tornado tracked across Powder Mill Road and ripped the roof off an office building at the intersection of Cedar Lane. It continued across the Beltsville Heights development and caused damage to the roof at Martin Luther King Elementary School. The tornado continued moving north-northeast toward Laurel. The continuation of the damage path was located at the Virginia Manor Industrial Park on Van Dusen Road where several trees were downed. The tornado was spotted as it moved past Laurel Hospital and it caused minor damage in the Village at Wellington subdivision nearby. The next concentrated area of damage was found at Laurel High School. An annex with 6 classrooms was heavily damaged. The roof was ripped off three of the classrooms and three people inside the structure were injured by flying debris. Significant damage was also reported to the athletic fields behind the school. The tornado moved northeast across the Fairlawn development where it damaged several homes. One home on 10th Street was destroyed after the twister removed the roof and an outside wall. On Montrose Avenue, a woman and her dog were briefly picked up by the tornado. The woman sustained injuries to her hip and leg after being tossed 3 feet in the air and the dog landed uninjured. The historic Harrison Building at the corner of 9th and Montgomery Streets lost its roof and a church and school nearby were damaged. The tornado remained on the ground as it crossed the Patuxent River into Howard County. Across Prince George's County, the tornado was responsible for $100 million in damage. A total of 861 homes, 561 vehicles, and 23 businesses were damaged countywide. In North Laurel, the twister heavily damaged a townhouse complex on Riverbrink Court in the Settlers Landing development. A total of 43 townhomes were damaged, four of which were uninhabitable. The tornado weakened to an F1 before it downed trees onto All Saints Road. The tornado weakened to an F0 as it exited North Laurel and moved across Savage Park. Isolated reports of downed trees were received in the community, including on Red Jacket Way, Vollmerhausen Road, and at the intersection of Interstate 95 and Route 32. In its final stages, the tornado crossed the General Electric Appliance Park and downed its final tree at the intersection of Snowden River Parkway and Route 175 southeast of Columbia. In addition to the devastating tornado, the storms also produced very heavy rainfall and gusty winds. In Anne Arundel County, strong winds from the tornadic thunderstorm downed 13 trees between Laurel and Maryland City. In northern Carroll County, a bow echo produced damaging winds which downed trees along Bankard Road northwest of Union Mills. Rainfall totals included 3.93 inches in Millers, 3.30 inches in Manchester, and 3.26 inches in Westminster. In Montgomery County, 2 to 4 inches of rainfall across the western portion of the county caused low lying areas to quickly fill with water. Several roads were flooded including River Road and Falls Road. A motorist had to be rescued after their car stalled in high water in Poolsville. A total of 3.61 inches of rainfall was recorded in Damascus. In Howard County, between 2 and 3.75 inches of rain fell. A total of 2.86 inches was recorded in Columbia and 3.46 inches fell just southeast of the city. In Frederick County, several roads were flooded by heavy downpours including Ball Road off Route 355 and New Design Road south of Adamstown Road. Heavy rain downed trees at the intersection of Greenfield and Page Roads, Lingamore road and Gashouse Pike, Lawson Road and Route 75, and Bittle Road and Route 17. Street flooding was also reported in Point of Rocks on Route 28. Rainfall totals included 2.54 inches in Wolfsville and 2.30 inches in Frederick. | |||||||||||
| 20.9 | 1996-07-19 | 3 | 39°30'N / 76°59'W | 39°29'N / 76°57'W | 2.20 Miles | 350 Yards | 0 | 3 | 5.0M | 20K | Carroll |
| Brief Description: One of the most potent tornadoes in recorded history in the state of Maryland tracked for 2 and 1/4 miles through the Mystic Kane and Four Seasons subdivisions just off state route 32 northwest of Gamber. The tornado was a strong F3 (180 mph estimated winds) with multiple vortices. Homes and trees struck by individual vortices sustained the worst damage. There were several eyewitness accounts of the tornado/funnel cloud shortly before touchdown. In all, 66 structures sustained damage. Twelve single-family homes were destroyed, five which lost most of the second story and garages. Three persons were injured. Two children were injured when the tornado blew them out of the second level of one of the homes. Their father suffered cuts and bruises when a wall partially collapsed on him while he was trying the rescue the children. Another dozen homes were deemed temporarily uninhabitable with substantial roof and siding damage. An additional 37 homes, a couple of apartments, and another barn received some damage. Many material items were sucked out of the homes, from bicycles to jewelry. Several automobiles were damaged by fallen and/or flying debris. Debris littered the ground for miles. A barn along route 32 was completely destroyed, and pieces of it were found as far away as 3.5 miles to the southeast of the barn's original location. Dozens of trees were snapped, shredded, debarked, and uprooted. Corn stalks were sucked up leaving six inch stubs as the tornado crossed a field west of route 32. A corn stalk was embedded into the wall of a house 1/2 mile away from the stalk's original location. Numerous airborne missiles (large and small) were generated, puncturing holes into homes and becoming embedded into the ground. A refrigerator was found wrapped around a mailbox. A van was dragged 50 feet, then flipped over two times. Other vehicles were also damaged. | |||||||||||
| 23.7 | 1978-08-28 | 2 | 39°43'N / 76°59'W | 39°34'N / 76°47'W | 14.80 Miles | 33 Yards | 0 | 0 | 0K | 0 | Frederick |
| 25.1 | 1978-07-31 | 2 | 39°18'N / 77°04'W | 0.80 Mile | 40 Yards | 0 | 0 | 250K | 0 | Howard | |
| 25.5 | 1980-06-29 | 2 | 39°31'N / 76°10'W | 2.00 Miles | 150 Yards | 0 | 10 | 250K | 0 | Harford | |
| 25.5 | 1979-05-23 | 2 | 39°35'N / 77°00'W | 2.00 Miles | 150 Yards | 0 | 0 | 2.5M | 0 | Carroll | |
| 27.0 | 2004-09-18 | 2 | 39°42'N / 76°22'W | 39°44'N / 76°22'W | 2.00 Miles | 125 Yards | 0 | 0 | 350K | 0 | Harford |
| Brief Description: A tornado touched down near a residence off Grier Nursery Road. The storm destroyed two mobile homes, the side of a barn was blown out, structural damage to two homes were noted, and numerous large healthy trees were twisted off near the bases. | |||||||||||
| 27.9 | 1959-07-19 | 2 | 39°31'N / 76°07'W | 0.80 Mile | 50 Yards | 0 | 0 | 25K | 0 | Harford | |
| 29.7 | 2001-09-24 | 3 | 38°56'N / 76°59'W | 39°06'N / 76°51'W | 11.50 Miles | 200 Yards | 2 | 55 | 100.0M | 0 | Prince George's |
| Brief Description: A large multi-vortex tornado touched down near Hyattsville, tracked along the Route 1 cooridor from College Park to Laurel, then crossed into Howard County. The tornado killed 2 students at the University of Maryland, injured 54 others countywide, and caused 100 million dollars in damage. F20VE, F23VE Severe thunderstorms moved through Central Maryland during the early evening of the 24th. One thunderstorm produced a devastating F3 tornado which was on the ground for 17.5 miles from College Park in Prince George's County to just east of Columbia in Howard County. Multiple vortices were reported with the tornado at times. The tornado first touched down in Northwest Branch Stream Valley Park just west of Hyattsville. It rapidly strengthened to an F3 tornado with winds up to 200 MPH. The damage path ranged in width from 100 to 200 yards. The tornado crossed the intersection of Adelphi Road and University Boulevard into the western campus of the University of Maryland. Ten trailers being used as a temporary office for the Maryland Fire and Rescue Institute were completely destroyed by the twister. Debris from the trailers such as video tapes and pieces of paper were found up to 60 miles away in Northern Baltimore and Harford Counties in addition to extreme southeast Pennsylvania. Four of the six people inside the trailers were injured, one seriously. One staff member was thrown free of the destruction and was found in a dumpster nearby. Another person dug their hands into the carpet and held on as their feet were being pulled up in the air by the tornado. The other four occupants, including one child, took shelter under desks and survived. Two University of Maryland students who were visiting their father who worked in the trailers left by car shortly before the tornado hit. The two sisters, ages 20 and 23, were killed when the tornado picked up their car outside of Denton Hall and threw it either around or over an eight-story dorm. They died instantly when their car crashed into a wooded area 300 yards from the road. Most of the other buildings on the campus in the path of the storm were made of brick and suffered only minor to moderate damage, such as Denton Hall Dormitory, Easton Hall Dormitory and Dining Hall, and the President's Mansion. A parking lot outside of Denton Hall full of cars was also hit by the tornado. At least 200 vehicles in the parking lot were damaged, including at least 100 that were blown into and onto other vehicles. At least twenty cars were totaled and one car was partially ripped apart. The woods behind the parking lot were nearly flattened. The bubble roof of the football practice facility near Byrd Stadium was removed. Forty-eight people on campus, including 25 students, were injured by flying debris as the twister downed trees and ripped pieces of siding and roofing off buildings. In addition, residential areas near the campus, including the University Courtyard Apartments sustained damage. A total of 3000 students were left temporarily homeless after two dorms and an off-campus housing unit were evacuated due to storm damage. During the recovery effort, a 78-year-old firefighter who responded to the tragedy at the University died of a heart attack shortly after returning from the scene. The tornado moved north-northeast off the campus and crossed University Boulevard at the intersection of Metzerott Road. The steeple of a church was removed and cars were flipped near the intersection. Power lines and trees were also downed. The twister continued through Paint Branch Stream Valley Park where it downed numerous trees. The tornado weakened to F2 strength before it crossed Interstate 95/495 just west of the Route 1 interchange. It was remarkable that even though the highway was filled with bumper to bumper rush hour traffic, the only damage reported was a flipped tractor trailer. The next area hit by the tornado was the community of Cherry Hill. Several trees and power lines were downed onto roads and houses just west of Baltimore Avenue, including the Chestnut Hills subdivision. Several businesses along Route 1 sustained minor damage, and three additional buildings lost portions of their roofs. Three employees of a business in the Chestnut Hills Shopping Center were injured by flying glass after the windows on the front of the store were shattered. The tornado moved across the National Agricultural Research Center and caused over $40 million dollars in damage. Thirty greenhouses were damaged and several long term studies inside were destroyed. Fifteen other buildings west of Route 1 suffered minor to moderate damage. Numerous trees, including a row of historic willow oaks, were downed. Over 65 vehicles in the employee parking lot were damaged by flying debris. Eleven of these vehicles were totaled. Just north of the research center, "stunning" tree and power line damage was reported at the intersection of Sellman and Montgomery Roads. The tornado tracked across Powder Mill Road and ripped the roof off an office building at the intersection of Cedar Lane. It continued across the Beltsville Heights development and caused damage to the roof at Martin Luther King Elementary School. The tornado continued moving north-northeast toward Laurel. The continuation of the damage path was located at the Virginia Manor Industrial Park on Van Dusen Road where several trees were downed. The tornado was spotted as it moved past Laurel Hospital and it caused minor damage in the Village at Wellington subdivision nearby. The next concentrated area of damage was found at Laurel High School. An annex with 6 classrooms was heavily damaged. The roof was ripped off three of the classrooms and three people inside the structure were injured by flying debris. Significant damage was also reported to the athletic fields behind the school. The tornado moved northeast across the Fairlawn development where it damaged several homes. One home on 10th Street was destroyed after the twister removed the roof and an outside wall. On Montrose Avenue, a woman and her dog were briefly picked up by the tornado. The woman sustained injuries to her hip and leg after being tossed 3 feet in the air and the dog landed uninjured. The historic Harrison Building at the corner of 9th and Montgomery Streets lost its roof and a church and school nearby were damaged. The tornado remained on the ground as it crossed the Patuxent River into Howard County. Across Prince George's County, the tornado was responsible for $100 million in damage. A total of 861 homes, 561 vehicles, and 23 businesses were damaged countywide. In North Laurel, the twister heavily damaged a townhouse complex on Riverbrink Court in the Settlers Landing development. A total of 43 townhomes were damaged, four of which were uninhabitable. The tornado weakened to an F1 before it downed trees onto All Saints Road. The tornado weakened to an F0 as it exited North Laurel and moved across Savage Park. Isolated reports of downed trees were received in the community, including on Red Jacket Way, Vollmerhausen Road, and at the intersection of Interstate 95 and Route 32. In its final stages, the tornado crossed the General Electric Appliance Park and downed its final tree at the intersection of Snowden River Parkway and Route 175 southeast of Columbia. In addition to the devastating tornado, the storms also produced very heavy rainfall and gusty winds. In Anne Arundel County, strong winds from the tornadic thunderstorm downed 13 trees between Laurel and Maryland City. In northern Carroll County, a bow echo produced damaging winds which downed trees along Bankard Road northwest of Union Mills. Rainfall totals included 3.93 inches in Millers, 3.30 inches in Manchester, and 3.26 inches in Westminster. In Montgomery County, 2 to 4 inches of rainfall across the western portion of the county caused low lying areas to quickly fill with water. Several roads were flooded including River Road and Falls Road. A motorist had to be rescued after their car stalled in high water in Poolsville. A total of 3.61 inches of rainfall was recorded in Damascus. In Howard County, between 2 and 3.75 inches of rain fell. A total of 2.86 inches was recorded in Columbia and 3.46 inches fell just southeast of the city. In Frederick County, several roads were flooded by heavy downpours including Ball Road off Route 355 and New Design Road south of Adamstown Road. Heavy rain downed trees at the intersection of Greenfield and Page Roads, Lingamore road and Gashouse Pike, Lawson Road and Route 75, and Bittle Road and Route 17. Street flooding was also reported in Point of Rocks on Route 28. Rainfall totals included 2.54 inches in Wolfsville and 2.30 inches in Frederick. | |||||||||||
| 32.3 | 1978-08-28 | 2 | 39°45'N / 77°00'W | 39°43'N / 76°59'W | 1.90 Miles | 33 Yards | 0 | 0 | 3K | 0 | York |
| 33.0 | 2001-09-24 | 2 | 39°44'N / 76°59'W | 39°48'N / 76°56'W | 5.00 Miles | 200 Yards | 0 | 0 | 900K | 0 | York |
| Brief Description: A tornado touched down near Grand Valley Road at 17:33 EST about 5 miles South of Hanover PA. The tornado proceded northward, through Parkville then lifting to the north of Blooming Grove at 17:40 EST. The path of the tornado was about 5 miles in length but not always on the ground while the width varied from 50 to 200 yards. The top wind speeds were estimated at 110 to 120 mph. There were no injuries or deaths. Significant damage included 8 homes with roofs torn off, brick and structural damage to several additional homes, 50 to 75 trees knocked down, 38 cars damaged at a car dealership, significant roof and water damage to a middle school and administration building, and significant structural damage to a store complex northwest of Blooming Grove. | |||||||||||
| 34.4 | 1990-06-08 | 2 | 39°49'N / 76°54'W | 1.00 Mile | 60 Yards | 0 | 1 | 250K | 0 | York | |
| 35.4 | 1978-08-28 | 2 | 39°48'N / 77°02'W | 39°45'N / 77°00'W | 3.30 Miles | 20 Yards | 0 | 0 | 3K | 0 | Adams |
| 35.7 | 1971-09-12 | 2 | 38°53'N / 76°53'W | 38°54'N / 76°49'W | 3.00 Miles | 200 Yards | 0 | 0 | 250K | 0 | Prince George's |
| 37.0 | 1952-04-05 | 3 | 39°48'N / 76°59'W | 39°57'N / 76°43'W | 17.50 Miles | 33 Yards | 0 | 4 | 2.5M | 0 | York |
| 37.5 | 1976-03-21 | 2 | 39°13'N / 75°56'W | 0.20 Mile | 100 Yards | 0 | 0 | 250K | 0 | Queen Anne's | |
| 38.3 | 1971-07-30 | 2 | 39°04'N / 76°03'W | 39°08'N / 75°55'W | 8.30 Miles | 300 Yards | 0 | 0 | 25K | 0 | Queen Anne's |
| 39.6 | 2002-05-02 | 2 | 39°39'N / 76°00'W | 39°42'N / 75°57'W | 4.50 Miles | 160 Yards | 0 | 0 | 330K | 0 | Cecil |
| Brief Description: The first F2 (on the Fujita Scale) tornado in 21 years struck Cecil County during the late afternoon of the 2nd. About 21 homes, silos, sheds and barns sustained moderate to extensive damage. One family was displaced as their house was condemned because of the wind damage. Many large trees and utility poles were splintered, uprooted or snapped. Marble size hail was also reported. No serious injuries were reported. Damage was estimated at $330,000. The path length was 4.5 miles. The maximum path width was 160 yards. The tornado initially touched down just to the west of England Creamery Road about 5 miles southeast of Rising Sun at 538 p.m. EDT. The tornado's intensity was F0 to F1 as it moved across England Creamery and Trinity Church Roads. One house on Trinity Church Road had its windows broken, its porch splintered and its roof damaged. A second house on the road had its porch torn away and shingles ripped from the roof. The homeowner's barn and its content was destroyed. Their lawn chairs and hedge trimmers were found half a mile away. One of the two points that the tornado reached its maximum intensity of F2 occurred when it moved through the Tailwind Estates on Steeplechase Lane. Three homes were heavily damaged. One house (the condemned one) had half its roof torn away and its chimney crash through its deck. The homeowner's SUV vehicle was displaced 25 feet and a shed on the block was tossed over 100 yards. The tornado's intensity again peaked at F2 as it moved through a wooded area north of Old Elm Road and west of Blue Ball Road. Extensive tree damage occurred. The second floor of a new home under construction in the area also collapsed. During the last half mile of its existence, the tornado weakened and did not remain on the ground the entire time. It dissipated around the intersection of Fairview Road and Maryland State Route 273 at 545 p.m. EDT. | |||||||||||
| 39.7 | 1978-07-31 | 2 | 39°24'N / 77°21'W | 1.50 Miles | 100 Yards | 0 | 0 | 25K | 0 | Frederick | |
| 39.9 | 1983-05-22 | 3 | 39°42'N / 77°14'W | 39°43'N / 77°12'W | 1.00 Mile | 37 Yards | 0 | 0 | 25K | 0 | Carroll |
| 40.3 | 1956-06-13 | 2 | 39°57'N / 76°43'W | 0 | 2 | 25K | 0 | York | |||
| 40.7 | 1954-04-25 | 2 | 39°50'N / 77°14'W | 39°48'N / 76°59'W | 13.30 Miles | 500 Yards | 0 | 0 | 25K | 0 | Adams |
| 40.7 | 1983-05-22 | 3 | 39°42'N / 77°15'W | 39°42'N / 77°14'W | 1.00 Mile | 37 Yards | 0 | 0 | 25K | 0 | Frederick |
| 41.6 | 1961-07-29 | 2 | 39°58'N / 76°40'W | 39°59'N / 76°30'W | 8.80 Miles | 500 Yards | 0 | 0 | 2.5M | 0 | York |
| 42.6 | 1995-10-05 | 2 | 38°49'N / 76°57'W | 2.50 Miles | 200 Yards | 0 | 3 | 5.0M | 0 | Prince George's | |
| Brief Description: The strongest tornado, containing estimated winds of 150 mph, caused substantial damage, and several injuries, at a Temple Hills neighborhood. Three persons sustained minor injuries requiring a short hospital stay; 17 others reported cuts and abrasions. In all, 100 homes suffered damage. Fifteen of the homes were damaged severely enough to be condemned; four homes lost their entire roofs. Numerous trees, several wide-girthed hardwoods, were uprooted, and 9,000 Potomac Electric Power customers were without power. | |||||||||||
| 43.3 | 1989-06-15 | 2 | 39°58'N / 76°40'W | 40°02'N / 76°30'W | 9.00 Miles | 100 Yards | 0 | 3 | 250K | 0 | York |
| 44.1 | 1981-05-15 | 2 | 39°36'N / 75°50'W | 1.50 Miles | 27 Yards | 0 | 2 | 2.5M | 0 | Cecil | |
| 44.5 | 1980-06-07 | 3 | 39°56'N / 77°01'W | 1.50 Miles | 400 Yards | 0 | 0 | 250K | 0 | Adams | |
| 45.1 | 1979-09-05 | 3 | 38°47'N / 77°05'W | 39°00'N / 77°16'W | 17.90 Miles | 300 Yards | 1 | 6 | 2.5M | 0 | Fairfax |
| 45.3 | 1963-03-27 | 2 | 40°00'N / 76°51'W | 40°03'N / 76°32'W | 17.00 Miles | 20 Yards | 0 | 0 | 25K | 0 | York |
| 45.5 | 1998-05-31 | 2 | 39°54'N / 76°10'W | 39°55'N / 76°03'W | 7.00 Miles | 880 Yards | 0 | 0 | 0 | 0 | Lancaster |
| Brief Description: The tornado struck about 12:30am EDT in the early morning hours of Monday, June 1st. Initial touchdown was just south of Quarryville. The tornado traveled east along a 7 mile path to Ninepoints. Damage was most extensive in the Ninepoints area and was rated an F2 intensity (112 to 157 mph). The width of the F2 damage was probably 100 to 200 yards wide with lesser damage extending out to 1/2 mile. At least 6 homes had significant damage. One home had the roof and second floor removed. Several barns were damaged and at least one destroyed. Trees were blown down on a number of homes. One person reported sighting the tornado. Only one minor injury was reported. | |||||||||||
| 45.6 | 1961-07-29 | 2 | 39°59'N / 76°30'W | 40°02'N / 76°15'W | 13.40 Miles | 500 Yards | 0 | 2 | 2.5M | 0 | Lancaster |
| 45.6 | 1989-06-15 | 2 | 40°02'N / 76°26'W | 40°00'N / 76°24'W | 3.00 Miles | 100 Yards | 0 | 0 | 2.5M | 0 | Lancaster |
| 46.2 | 1989-06-15 | 2 | 40°02'N / 76°30'W | 40°02'N / 76°26'W | 4.00 Miles | 100 Yards | 0 | 3 | 250K | 0 | Lancaster |
| 46.4 | 1983-10-13 | 2 | 38°53'N / 77°12'W | 1.00 Mile | 40 Yards | 0 | 0 | 2.5M | 0 | Falls Church (c) | |
| 46.9 | 1954-07-01 | 2 | 39°27'N / 75°44'W | 1.00 Mile | 50 Yards | 0 | 0 | 3K | 0 | New Castle | |
| 47.4 | 1973-04-01 | 3 | 38°51'N / 77°13'W | 38°52'N / 77°10'W | 2.70 Miles | 100 Yards | 0 | 0 | 25K | 0 | Fauquier |
| 48.1 | 1974-08-17 | 2 | 39°57'N / 76°06'W | 0.70 Mile | 33 Yards | 0 | 0 | 25K | 0 | Lancaster | |
| 48.2 | 1969-07-27 | 2 | 40°04'N / 76°42'W | 0.30 Mile | 100 Yards | 0 | 0 | 250K | 0 | York | |
| 48.5 | 1969-08-09 | 2 | 38°52'N / 77°14'W | 0 | 0 | 250K | 0 | Fairfax | |||
| 49.2 | 1991-05-06 | 2 | 40°05'N / 76°40'W | 1.00 Mile | 100 Yards | 0 | 3 | 250K | 0 | Lancaster | |
| 49.3 | 1978-06-27 | 2 | 38°42'N / 76°40'W | 38°37'N / 76°35'W | 6.90 Miles | 50 Yards | 0 | 0 | 250K | 0 | Calvert |
| 49.6 | 1983-07-21 | 2 | 39°10'N / 75°43'W | 1.00 Mile | 20 Yards | 2 | 9 | 250K | 0 | Kent | |
| 49.8 | 1980-06-07 | 2 | 40°02'N / 77°01'W | 40°02'N / 76°57'W | 3.30 Miles | 33 Yards | 0 | 0 | 2.5M | 0 | York |
* 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.