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Henry County Natural Disasters and Weather Extremes

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The chance of earthquake damage in Henry County is lower than Illinois average and is much lower than the national average. The risk of tornado damage in Henry County is lower than Illinois average and is higher than the national average.

Topics:Earthquake Index Volcano Index Tornado Index Other Weather Extremes Events Volcanos Nearby Historical Earthquake Events Historical Tornado Events

Earthquake Index, #78

Henry County	0.03
Illinois	0.24
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

Henry County	0.0000
Illinois	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, #61

Henry County	203.23
Illinois	220.15
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 14,079 other weather extremes events within 50 miles of Henry County 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:	54	Cold:	118	Dense Fog:	89	Drought:	54
Dust Storm:	0	Flood:	1,309	Hail:	3,726	Heat:	83	Heavy Snow:	155
High Surf:	0	Hurricane:	0	Ice Storm:	112	Landslide:	1	Strong Wind:	165
Thunderstorm Winds:	6,704	Tropical Storm:	0	Wildfire:	6	Winter Storm:	310	Winter Weather:	355
Other:	838

Volcanos Nearby

No volcano is found in or near Henry County.

Historical Earthquake Events

A total of 1 historical earthquake event that had a recorded magnitude of 3.5 or above found in or near Henry County.

Distance (miles)	Date	Magnitude	Depth (km)	Latitude	Longitude
40.3	1972-09-15	3.7	5	41.59	-89.42

Historical Tornado Events

A total of 77 historical tornado events that had recorded magnitude of 2 or above found in or near Henry County.

Distance (miles)	Date	Magnitude	Start Lat/Log	End Lat/Log	Length	Width	Fatalities	Injuries	Property Damage	Crop Damage	Affected County
4.3	1974-04-21	2	41°22'N / 90°03'W		2.00 Miles	50 Yards	0	0	3K	0	Henry
4.7	1962-05-28	2	41°25'N / 90°09'W				0	0	250K	0	Henry
7.6	1967-04-21	2	41°26'N / 90°24'W	41°29'N / 89°55'W	25.10 Miles	300 Yards	0	0	250K	0	Henry
10.3	1959-09-26	2	41°11'N / 90°22'W	41°18'N / 90°10'W	12.90 Miles	33 Yards	0	0	250K	0	Henry
10.5	1965-04-23	2	41°21'N / 90°20'W		0.20 Mile	100 Yards	0	0	25K	0	Henry
11.3	1996-04-19	3	41°12'N / 90°07'W	41°11'N / 90°02'W	3.00 Miles	100 Yards	0	4	10.0M	0	Henry
		Brief Description: 10 Million in damage and 4 hospitalized as this tornado moved from Bishop Hill through Galva. At least 6 Million of damage was reported in the city limits of Galva where 150 homes were damaged, 26 received extensive damage, and 15 had to be destroyed. Extensive damage was also received to the city sewage treatment plant. A second, small and short lived tornado, did much less damage to the eastern part of town, most notably pushing over gravestones in a cemetery and downing trees.
11.3	1956-04-26	2	41°29'N / 90°22'W	41°29'N / 90°09'W	10.90 Miles	33 Yards	0	0	250K	0	Henry
14.0	1973-04-21	2	41°26'N / 90°25'W	41°29'N / 90°18'W	6.40 Miles	33 Yards	0	0	2.5M	0	Henry
14.0	1962-05-28	2	41°13'N / 90°20'W				0	0	0K	0	Henry
16.8	1967-04-21	2	41°32'N / 89°58'W	41°32'N / 89°52'W	4.50 Miles	300 Yards	0	0	25K	0	Henry
16.9	1974-04-13	2	41°14'N / 90°25'W		0.10 Mile	17 Yards	0	1	3K	0	Mercer
17.0	1974-05-16	2	41°20'N / 90°33'W	41°21'N / 90°22'W	9.20 Miles	100 Yards	0	0	2.5M	0	Rock Island
19.5	1974-04-13	2	41°12'N / 90°27'W		0.10 Mile	20 Yards	0	0	25K	0	Mercer
19.8	1975-03-23	2	41°04'N / 90°11'W		1.00 Mile	80 Yards	0	2	25K	0	Knox
20.1	1990-03-13	3	41°36'N / 90°17'W	41°37'N / 90°20'W	0.50 Mile	73 Yards	0	0	250K	0	Scott
21.0	1973-04-21	2	41°20'N / 90°39'W	41°26'N / 90°25'W	13.60 Miles	33 Yards	0	2	2.5M	0	Rock Island
21.2	1959-08-26	2	41°36'N / 90°17'W	41°41'N / 90°14'W	5.60 Miles	50 Yards	0	0	25K	0	Rock Island
21.7	1966-04-19	3	41°30'N / 90°30'W		2.00 Miles	100 Yards	0	0	250K	0	Scott
21.9	1976-03-04	2	41°02'N / 90°06'W		0.10 Mile	440 Yards	0	0	25K	0	Knox
24.7	1974-06-14	3	41°18'N / 90°35'W	40°56'N / 90°24'W	26.90 Miles	440 Yards	0	1	0K	0	Mercer
24.7	1990-03-13	3	41°37'N / 90°20'W	41°46'N / 90°13'W	12.00 Miles	250 Yards	0	1	2.5M	0	Rock Island
25.0	2006-04-13	2	41°16'N / 90°37'W	41°16'N / 90°35'W	2.00 Miles	50 Yards	0	0	30K	0	Mercer
		Brief Description: Rated low F2 Tornado developed just east of 240th Street at 2107 CST and tracked generally east across the far northern part of Matherville and dissipated just west of U.S. 67 east of Matherville at 2111 CST. Two homes had roof damage done to them with the sheriff's office indicating one house was completely unroofed.
25.6	1974-06-14	3	41°23'N / 90°40'W	41°18'N / 90°35'W	6.80 Miles	33 Yards	0	0	0K	0	Rock Island
27.6	1981-03-29	4	41°41'N / 89°57'W	41°45'N / 89°53'W	5.10 Miles	33 Yards	0	0	2.5M	0	Whiteside
27.7	1961-05-14	3	40°54'N / 89°59'W	41°07'N / 89°43'W	20.20 Miles	100 Yards	0	0	2.5M	0	Peoria
28.7	1959-09-26	2	41°10'N / 89°39'W	41°12'N / 89°36'W	1.90 Miles	40 Yards	0	0	25K	0	Stark
29.0	1990-03-13	3	41°46'N / 90°13'W	41°46'N / 90°12'W	3.00 Miles	250 Yards	0	0	2.5M	0	Whiteside
29.1	1978-08-15	3	41°20'N / 90°41'W	41°21'N / 90°42'W			0	0	250K	0	Rock Island
29.8	1967-01-24	2	41°37'N / 90°35'W		2.00 Miles	250 Yards	0	0	250K	0	Scott
30.5	1974-05-13	3	41°37'N / 90°36'W	41°40'N / 90°33'W	3.60 Miles	100 Yards	0	0	2.5M	0	Scott
31.1	1976-03-04	3	41°12'N / 89°34'W		0.80 Mile	100 Yards	0	0	250K	0	Bureau
31.4	1978-08-15	3	41°16'N / 90°47'W	41°20'N / 90°41'W	6.40 Miles	77 Yards	0	0	250K	0	Mercer
31.8	1966-03-21	2	41°48'N / 90°00'W				0	0	25K	0	Whiteside
31.9	1973-04-21	2	41°16'N / 90°50'W	41°20'N / 90°39'W	10.20 Miles	33 Yards	0	0	2.5M	0	Mercer
32.7	1975-06-14	2	41°10'N / 89°33'W				0	0	250K	0	Bureau
33.2	1967-07-23	2	41°07'N / 89°41'W	41°03'N / 89°31'W	9.40 Miles	50 Yards	0	0	25K	0	Stark
33.5	1965-04-24	3	41°09'N / 89°37'W	41°06'N / 89°30'W	6.50 Miles	43 Yards	0	1	25K	0	Marshall
34.5	2001-06-14	2	41°29'N / 90°47'W	41°33'N / 90°44'W	6.40 Miles	200 Yards	0	3	0	0	Scott
		Brief Description: An F2 tornado touched down at 501 pm CST, around a half mile east/northeast of Montpelier, near Highway 22 and the Muscatine/Scott County line. The tornado then tracked northeast into Scott County, was on the ground about 6.5 miles, and was 200 yards wide. The tornado ripped the roof off of three homes in Blue Grass, and produced lesser damage to many other homes. Three people in Blue Grass sustained minor injuries. The tornado produced F2 damage in the area around Normandy Street in Blue Grass, before lifting 2.5 miles northeast of the community at 506 pm CST.
35.6	2001-06-14	2	41°28'N / 90°48'W	41°28'N / 90°48'W	0.10 Mile	200 Yards	0	0	0	0	Muscatine
		Brief Description: An F2 tornado touched down at 501 pm CST, around a half mile east/northeast of Montpelier, near Highway 22 and the Muscatine/Scott County line. The tornado then tracked northeast into Scott County, was on the ground about 6.5 miles, and was 200 yards wide. The tornado ripped the roof off of three homes in Blue Grass, and produced lesser damage to many other homes. Three people in Blue Grass sustained minor injuries. The tornado produced F2 damage in the area around Normandy Street in Blue Grass, before lifting 2.5 miles northeast of the community at 506 pm CST.
35.6	1998-06-18	2	41°06'N / 90°48'W	41°11'N / 90°43'W	6.00 Miles	880 Yards	0	0	110K	0	Mercer
		Brief Description: The tornado damaged several rural home sites. Northeast of Seaton damage was noted to farm buildings and a silo. South of Aledo seven power lines poles were snapped, and a farmhouse 4 miles west of Aledo was destroyed. The tornado also damaged or destroyed farm buildings, roofs and chimneys south of Aledo.
36.4	1981-07-25	2	40°54'N / 89°46'W		2.00 Miles	20 Yards	0	0	250K	0	Peoria
36.8	1988-05-08	3	41°46'N / 90°45'W	41°52'N / 90°12'W	30.00 Miles	150 Yards	0	0	25.0M	0	Clinton
37.4	1962-05-07	3	41°40'N / 90°43'W		10.00 Miles	300 Yards	0	0	250K	0	Scott
37.4	1972-07-17	3	41°04'N / 89°38'W	41°08'N / 89°21'W	15.20 Miles	200 Yards	0	0	2.5M	0	Marshall
37.4	1961-05-14	3	40°43'N / 90°13'W	40°54'N / 89°59'W	17.30 Miles	100 Yards	0	8	2.5M	0	Knox
37.6	1967-05-07	2	41°32'N / 90°54'W	41°29'N / 90°45'W	8.00 Miles	200 Yards	0	0	25K	0	Muscatine
37.7	1995-05-09	3	41°32'N / 90°49'W		7.00 Miles	500 Yards	0	0	3.0M	0	Scott
		Brief Description: This tornado destroyed 26 farm buildings, 20 of them with major damage. Nine homes were hit, one destroyed, two with major damage and six with minor damage. Seven of the nine homes were farmhouses. Roxanne Paper, with baby boy Logan in arm, was downstairs when the tornado struck. She reported that it sounded like something big was tearing through the house. The Gary Meincke farm was hit very hard. He and his wife watched the tornado touch down south of their farm at around 1630 CDT. Shortly after that they ran with their children to the basement. Debris from the Leroy Feldhahn farm near Stockton was spread over nearby Interstate 80 causing a two mile long traffic jam. Governor Terry Branstad later proclaimed a Disaster Emergency for Scott County.
37.7	1967-01-24	2	41°52'N / 90°22'W		1.00 Mile	200 Yards	0	0	25K	0	Clinton
37.9	1959-09-26	2	40°54'N / 90°38'W	40°57'N / 90°33'W	4.90 Miles	300 Yards	1	0	250K	0	Warren
38.7	1966-05-23	2	41°41'N / 90°44'W		2.00 Miles	250 Yards	0	0	25K	0	Scott
38.9	1974-06-14	3	40°56'N / 90°24'W	40°43'N / 90°24'W	14.90 Miles	33 Yards	0	1	0K	0	Knox
38.9	1963-04-18	2	41°02'N / 90°45'W				0	0	25K	0	Warren
38.9	1974-06-20	3	41°59'N / 90°16'W	41°50'N / 90°12'W	10.60 Miles	200 Yards	1	20	2.5M	0	Clinton
39.3	1962-05-07	2	41°48'N / 89°39'W	41°43'N / 89°33'W	7.20 Miles	10 Yards	0	0	0K	0	Whiteside
39.3	1962-05-07	2	41°48'N / 89°39'W	41°43'N / 89°33'W	7.20 Miles	10 Yards	0	0	0K	0	Whiteside
39.5	2010-06-05	2	40°48'N / 90°05'W	40°46'N / 89°59'W	6.00 Miles	50 Yards	0	0	420K	50K	Knox
		Brief Description: EVENT NARRATIVE: A tornado touched down 4.5 miles west-northwest of Yates City in eastern Knox County then tracked southeastward to the Knox-Peoria County line. Large tree limbs were snapped and crops were scoured in numerous places along this path. A house had the roof torn off and much of the upper level of the structure severely damaged. The attached garage was also destroyed. In addition, a large garage was destroyed, and seven outbuildings were severely damaged. The tornado continued southeastward into Peoria County. EPISODE NARRATIVE: A stationary frontal boundary extending from southern Michigan across north-central Illinois served as the focus for severe thunderstorm development during the late afternoon and evening of June 5th. A vigorous upper-level disturbance tracking across the Upper Midwest added extra wind energy to the atmosphere, allowing supercell thunderstorms to develop along the front. Eight tornadoes were spawned by the storms, mainly along a Galesburg to Eureka line. An isolated tornado formed further south across eastern Logan and western DeWitt counties as well. No injuries were reported.
40.3	1995-05-13	2	40°44'N / 90°23'W	40°49'N / 90°09'W	14.00 Miles	880 Yards	0	2	1.6M	0	Knox
		Brief Description: A tornado touched down 1 N of St. Augustine and traveled to the northeast. Twelve farm structures and 14 pieces of farm equipment were destroyed. Eighteen homes were either damaged or destroyed. Numerous trees were blown over and a 10 acre orchard with over 1200 trees was destroyed. The tornado also took off the roof of the Maquon Fire Department before it lifted and dissipated 1 NE of Maquon. Two people sustained minor injuries and damage was estimated around $1.6 million.
41.1	1967-04-21	2	41°37'N / 89°29'W	41°38'N / 89°22'W	5.60 Miles	77 Yards	0	0	25K	0	Lee
41.2	2010-06-05	2	40°46'N / 89°59'W	40°46'N / 89°57'W	2.00 Miles	50 Yards	0	0	85.0M	0K	Peoria
		Brief Description: EVENT NARRATIVE: A tornado crossed the Knox-Peoria County line 1.1 miles west of Elmwood, then continued southeastward through the town of Elmwood. Considerable structural damage occurred to 10 homes, 30 businesses and nearly two dozen vehicles in downtown Elmwood, amounting to approximately $85 million in damages. There was a total of about 80 people, some that were attending an outdoor festival in the downtown and some that were at a theater, that took shelter in the basement of the movie theater. As a result, there were no injuries. The tornado dissipated 1 mile east of Elmwood. EPISODE NARRATIVE: A stationary frontal boundary extending from southern Michigan across north-central Illinois served as the focus for severe thunderstorm development during the late afternoon and evening of June 5th. A vigorous upper-level disturbance tracking across the Upper Midwest added extra wind energy to the atmosphere, allowing supercell thunderstorms to develop along the front. Eight tornadoes were spawned by the storms, mainly along a Galesburg to Eureka line. An isolated tornado formed further south across eastern Logan and western DeWitt counties as well. No injuries were reported.
41.5	1995-07-27	2	41°45'N / 90°47'W	41°43'N / 90°43'W	5.50 Miles	60 Yards	0	0	10K	70K	Scott
41.9	1967-04-21	2	41°15'N / 89°20'W		0.30 Mile	30 Yards	0	1	3K	0	Putnam
42.7	1959-09-26	2	41°57'N / 90°06'W	41°59'N / 90°02'W	3.30 Miles	40 Yards	0	0	25K	0	Carroll
42.7	1967-01-24	2	41°57'N / 90°20'W				0	0	250K	0	Clinton
43.1	1976-06-29	4	40°48'N / 89°45'W	40°50'N / 89°39'W	4.90 Miles	40 Yards	0	0	250K	0	Peoria
43.3	1988-05-08	3	41°45'N / 90°47'W	41°46'N / 90°45'W	2.00 Miles	150 Yards	0	0	25.0M	0	Scott
43.5	1957-05-21	2	41°33'N / 91°00'W	41°36'N / 90°50'W	8.90 Miles	100 Yards	0	0	250K	0	Cedar
43.7	1995-05-09	3	41°35'N / 90°52'W	41°43'N / 90°53'W	10.00 Miles	75 Yards	0	0	650K	0	Muscatine
44.4	1967-01-24	2	41°47'N / 90°46'W		2.00 Miles	143 Yards	0	0	25K	0	Scott
45.0	1956-08-30	2	41°48'N / 89°30'W				0	0	3K	0	Lee
45.9	1995-07-27	2	41°56'N / 90°45'W	41°49'N / 90°36'W	10.50 Miles	70 Yards	0	0	200K	150K	Clinton
46.7	1975-06-13	3	40°41'N / 90°15'W	40°40'N / 90°07'W	6.60 Miles	1300 Yards	0	0	2.5M	0	Fulton
46.8	2004-04-20	2	41°15'N / 89°17'W	41°18'N / 89°11'W	6.80 Miles	880 Yards	0	5	8.0M	0	Putnam
		Brief Description: Rated very high end F2 The low topped supercell that produced 2 earlier tornadoes in Stark and Marshall/Bureau counties continued to be a cyclic tornado producer. The deadliest and longest lived tornado started at 1644 CST, 0.7 miles North Northeast of Florid in Putnam County and moved northeast toward Granville. The long lived nature of the tornado was due to it riding along a warm front pushing through Putnam and La Salle counties. Satellite imagery indicated a strengthening mesocyclone at 1625 CST (2225 Z) with the formation of a new line of feeder clouds into the supercell, and KDVN 88D velocity data showed a strengthening TVS signature by 1635 CST (2235 Z). Witnesses reported a multiple vortex tornado just prior to its arrival in Granville. The tornado hit Granville at 1647-1648 CST which coincided with the failure of the main power feed into town. The town was bisected by the half mile wide tornado with 12 buildings destroyed, 45 with major damage, and 26 with minor damage (mainly residential). The Granville State National Bank lost its roof and Hopkins Elementary School lost the roof over the old gymnasium with damage in nearly all the classrooms. Significant damage also occurred to Granville Drugs, the only drug store in town. In a strange twist of irony, the town had finally recovered from a major fire 4 years earlier that decimated much of the business district. The tornado continued northeast out of Granville and crossed over into La Salle County (WFO LOT) at 1653 CST (2253 Z), 3.8 miles Northeast of Granville. The Granville/Utica tornado was the first significant test of a new statewide mutual aid response agreement. In Granville 5 people were injured by the tornado, including an eldery female who suffered a heart attack during the tornado and was eventually Life Flighted to a Peoria hospital. Injuries were low due to the 32 minutes of lead time before the tornado struck Granville. Damage in Granville is estimated to be at least $8 million with the school suffering at least $3.5 million in damage.
47.8	1967-01-24	2	41°48'N / 90°50'W		2.00 Miles	150 Yards	0	0	25K	0	Clinton
48.2	1965-11-12	2	41°12'N / 89°18'W	41°15'N / 89°08'W	8.70 Miles	50 Yards	0	0	250K	0	Putnam
48.9	1965-09-14	3	40°45'N / 89°43'W	40°44'N / 89°35'W	6.60 Miles	200 Yards	0	30	2.5M	0	Peoria
48.9	1972-04-06	2	41°54'N / 89°31'W	41°43'N / 89°18'W	16.60 Miles	50 Yards	0	6	250K	0	Lee
49.2	1961-06-07	2	41°42'N / 90°58'W	41°46'N / 90°54'W	5.10 Miles	200 Yards	0	1	25K	0	Cedar

* 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.