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Pontiac, IL Natural Disasters and Weather Extremes

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

Topics:Earthquake IndexVolcano IndexTornado IndexOther Weather Extremes EventsVolcanos NearbyHistorical Earthquake EventsHistorical Tornado Events

Earthquake Index, #1284

Pontiac, IL
0.02
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

Pontiac, IL
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, #937

Pontiac, IL
206.29
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 2,726 other weather extremes events within 50 miles of Pontiac, IL were recorded from 1950 to 2010. The following is a break down of these events:

TypeCountTypeCountTypeCountTypeCountTypeCount
Avalanche:0Blizzard:9Cold:29Dense Fog:13Drought:21
Dust Storm:0Flood:170Hail:765Heat:43Heavy Snow:42
High Surf:0Hurricane:0Ice Storm:30Landslide:0Strong Wind:51
Thunderstorm Winds:1,264Tropical Storm:0Wildfire:1Winter Storm:116Winter Weather:88
Other:84 

Volcanos Nearby

No volcano is found in or near Pontiac, IL.

Historical Earthquake Events

No historical earthquake events that had recorded magnitudes of 3.5 or above found in or near Pontiac, IL.

No historical earthquake events found in or near Pontiac, IL.

Historical Tornado Events

A total of 82 historical tornado events that had recorded magnitude of 2 or above found in or near Pontiac, IL.

Distance (miles)DateMagnitudeStart Lat/LogEnd Lat/LogLengthWidthFatalitiesInjuriesProperty DamageCrop DamageAffected County
7.42004-05-23240°46'N / 88°45'W40°52'N / 88°46'W7.80 Miles240 Yards0000Livingston
 Brief Description: A tornado moved into Livingston County from McLean County, 1.7 miles northwest of Chenoa. A farm house was unroofed and a double-wide mobile home, outbuildings and grain bins were destroyed. The tornado ended 8 miles southwest of Pontiac or 2.5 miles southwest of Ocoya. At its strongest point, the tornado was 240 yards wide, with wind speeds between 130 and 140 mph. For additional information on this tornado, see Storm Data for ILLINOIS, Central.
11.11986-09-29240°45'N / 88°39'W40°42'N / 88°35'W5.00 Miles50 Yards002.5M0Mclean
11.61980-06-07240°52'N / 88°46'W40°39'N / 88°14'W31.50 Miles880 Yards002.5M0Livingston
12.11986-09-29240°42'N / 88°35'W40°45'N / 88°31'W4.00 Miles50 Yards002.5M0Livingston
12.61976-07-28240°44'N / 88°47'W0025K0Mclean
12.81955-12-03240°57'N / 88°57'W41°11'N / 88°25'W32.00 Miles33 Yards000K0La Salle
12.82004-05-23240°43'N / 88°51'W40°45'N / 88°44'W5.30 Miles216 Yards0000Mclean
 Brief Description: A tornado touched down 3 miles southeast of Gridley damaging several farm buildings. It then traveled to the northeast increasing in intensity 1.5 miles south southwest of Meadows causing moderate damage to several more farm buildings. The tornado continued to intensify reaching F2 intensity right before it crossed over into Livingston County. There were no buildings on the McLean County side of the road but the survey team determined that the damage to the buildings on the Livingston County side of the road was of F2 intensity. The tornado then traveled into Livingston County (NWS Chicago's warning area). No injuries were reported.
14.42010-06-05341°06'N / 88°43'W41°05'N / 88°34'W9.00 Miles440 Yards00750K0KLivingston
 Brief Description: EVENT NARRATIVE: Very quickly after the tornado that hit Streator lifted, yet another tornado touched down over extreme northern Livingston county approximately one quarter mile south of the county line and about a half mile west of 1100 E Road. Shortly after touching down, this tornado caused severe damage to homes on 1100 E Road and destroyed a barn as well. There were also several large trees downed in this location. As the tornado continued eastward, it completely collapsed a metal truss high tension electrical tower and bent over several other metal truss electrical towers in its path, which is consistent with low end EF3 damage. At this time the tornado was moving through an extremely rural area, however there was also a lone hardwood tree in its path that was debarked, with only large de-leafed branches remaining. The tornado continued eastward crossing Illinois Route 170 just south of the LaSalle and Livingston county line where hardwood trees were snapped. Large trees were broken at a farm house and a machine shed and grain bins were destroyed. The tornado then moved eastward for several more miles downing multiple trees and resulting in some minor structural damage between 1700 E Road and 1800 E Road. EPISODE NARRATIVE: Severe thunderstorms, including a few long tracked supercells moved across central and northern Illinois, producing damaging winds, hail and tornadoes.
14.91978-06-25240°46'N / 88°34'W40°46'N / 88°15'W16.40 Miles400 Yards00250K0Livingston
16.51976-06-29240°39'N / 88°43'W0025K0Mclean
17.02010-06-05241°05'N / 88°31'W41°05'N / 88°24'W6.00 Miles300 Yards1133.0M0KLivingston
 Brief Description: EVENT NARRATIVE: The beginning of the Dwight tornado occurred about 6 miles west of Dwight and about a quarter mile south of IL Route 17. On N 2200 E Road, 0.3 miles south of IL Route 17, a farm house sustained damage to windows, siding, and shingles, with many trees uprooted or damaged. Outbuildings were also damaged. The tornado at this point was rated EF1, with a path width of 70 yards. Debris from this farm was spread 200 yards wide across the field at N 2300E Road. The tornado proceeded to strike the golf course at N 2400 E Road, where numerous large trees were snapped and uprooted. Golf cart sheds were unroofed or severely damaged. At this point the tornado was rated low end EF2 with a path width of 300 yards. The tornado then moved east across Interstate 55 and moved into Dwight, damaging a lumber yard and other businesses. At Williams Street and old Route 66 a mobile home park was hit. Fourteen people were injured. One person who was seriously injured, later died. At the mobile home park, 35 mobile homes were destroyed. Damage here was rated EF2. Large trees were uprooted and power poles were snapped at the railroad tracks. At a ball field a little farther east, trees and fences were damaged and an announcer's booth was destroyed. Slightly farther east, there was minor damage to a church, but the church's garage was destroyed. There was damage to the high school auditorium roof and facade, and a greenhouse. A storage garage was destroyed at the high school. The tornado then continued east into a subdivision between Philmar Street and Prospect Avenue, where many large trees were downed on top of homes. At Sunset Drive and Wilmac Street a garage door and roof were taken off. A roof was taken off a house on Linden Street a half block west of Il Route 47. Three houses were uninhabitable and had to be destroyed. More than 100 homes had some damage. Damage in Dwight was rated high end EF1 to low end EF2. The tornado dissipated in an open field east of Route 47. EPISODE NARRATIVE: Severe thunderstorms, including a few long tracked supercells moved across central and northern Illinois, producing damaging winds, hail and tornadoes.
17.31985-07-09240°57'N / 88°58'W0.50 Mile167 Yards08250K0La Salle
17.71954-04-07340°53'N / 88°25'W41°00'N / 88°13'W13.00 Miles400 Yards00250K0Livingston
17.81956-03-06240°38'N / 88°46'W40°38'N / 88°42'W2.30 Miles200 Yards0025K0Mclean
18.51970-06-16240°37'N / 88°50'W40°40'N / 88°46'W4.30 Miles40 Yards0025K0Mclean
19.21981-04-13240°37'N / 88°45'W002.5M0Mclean
19.41965-11-12241°03'N / 89°00'W41°16'N / 88°27'W32.10 Miles17 Yards00250K0La Salle
20.21974-06-19240°54'N / 89°02'W1.00 Mile20 Yards000K0Woodford
20.22010-06-05241°06'N / 89°04'W41°06'N / 88°45'W17.00 Miles800 Yards0177.0M0KLa Salle
 Brief Description: EVENT NARRATIVE: Shortly after the Magnolia, IL tornado lifted, the same supercell thunderstorm went on to produce another tornado near the Marshall and LaSalle County line. National Weather Service damage survey teams found the damage from this tornado began just west of 2900 E Road and about one quarter mile south of 1250 N Road, or N 12th Road, which is the road that marks the county line. The tornado crossed north of 1250 N Road at Interstate 39. See Stormdata for Illinois, Central for the beginning of this tornado. This tornado continued eastward tracking along and just north of 12th Road, producing primarily EF0 to EF1 intensity damage, largely in the form of downed trees, power lines, and very minor structural damage. After the tornado moved past E 9th Road, the damage became more sporadic, which corresponded with spotter and storm chasers who reported that the tornado was not continuously on the ground before it reached Streator. Damage became more consistent again as the tornado moved east of E 12th Road, remaining just north of N 12th Road. The tornado appears to have remained on the ground from this point east into the city of Streator. The damage from E 9th Road east to E 15th Road was rated EF0 intensity and consisted primarily of minor tree damage. The tornado appears to have intensified as it moved into the city of Streator with EF2 intensity damage near the Eagle Pass subdivision where there was significant tree damage, along with portions of roofs removed from well built single family homes. The tornado continued eastward across southern portions of the city of Streator, damaging numerous homes and completely destroying several homes. Some of the most intense damage in Streator occurred along Hall Street and near Southside Athletic Park, where damage was rated higher end EF2. The most intense damage occurred through an approximately one quarter mile wide path through the city of Streator. Twenty one homes were uninhabitable and had to be destroyed. Another 33 homes were uninhabitable and had to undergo major repair. Another 150 homes had some degree of damage. A few businesses were also damaged including the Engle Lane Theater, an auto salvage business, an auto repair shop, and a landscape and nursery business. The tornado then continued eastward out of the city of Streator producing additional EF0 to EF1 intensity damage just north of the Livingston and LaSalle county border. The tornado appears to have jogged slightly southward before lifting near the county line, just to the west of E 22nd Road. EPISODE NARRATIVE: Severe thunderstorms, including a few long tracked supercells moved across central and northern Illinois, producing damaging winds, hail and tornadoes.
21.11950-03-27240°34'N / 88°36'W40°36'N / 88°33'W3.00 Miles50 Yards003K0Mclean
23.51956-04-03240°55'N / 88°12'W2.00 Miles50 Yards0025K0Ford
24.11974-04-03340°31'N / 88°37'W40°34'N / 88°29'W7.40 Miles350 Yards00250K0Mclean
24.21982-08-24240°31'N / 88°53'W40°33'N / 88°28'W18.00 Miles300 Yards002.5M0Mclean
26.21982-08-24240°33'N / 88°28'W40°33'N / 88°21'W5.50 Miles300 Yards002.5M0Ford
27.81975-05-20241°12'N / 88°19'W2.00 Miles50 Yards01250K0Grundy
28.71980-06-07240°39'N / 88°14'W40°37'N / 88°11'W3.00 Miles33 Yards002.5M0Ford
29.21986-09-24240°49'N / 89°12'W2.50 Miles73 Yards00250K0Woodford
29.61965-09-14240°28'N / 88°34'W40°28'N / 88°28'W4.90 Miles77 Yards00250K0Mclean
29.61975-05-30240°36'N / 89°08'W40°39'N / 89°04'W4.30 Miles100 Yards0025K0Mclean
30.51972-07-17341°08'N / 89°21'W41°30'N / 88°10'W66.30 Miles33 Yards000K0Putnam
31.42003-05-30240°51'N / 89°18'W40°47'N / 89°11'W7.30 Miles150 Yards0000Woodford
 Brief Description: Several homes sustained major damage and several sheds were destroyed by the tornado. It also blew down numerous trees, tree limbs, power lines and power poles. As the tornado approached Roanoke, it weakened quite a bit with only minor tree damage reported through town before the tornado lifted and dissipated on the southeast side of town. No injuries were reported.
31.61965-09-14240°28'N / 88°28'W40°28'N / 88°20'W6.60 Miles77 Yards02250K0Ford
32.12004-07-13440°48'N / 89°20'W40°47'N / 89°10'W9.60 Miles440 Yards0300Woodford
 Brief Description: The tornado touched down around 234 pm CDT approximately 1.75 miles north-northeast of Metamora in western Woodford County. The tornado traveled southeast for about 2.5 miles, before beginning a temporary eastward jog between county roads 1300E and 1400E. The tornado curved southeast again, striking the Parsons Company, Inc.'s manufacturing plant around 241 pm CDT. The plant was severely damaged by the tornado. Approximately 140 people were in the plant at the time, but all personnel made it to storm shelters in time (approximately 3 to 5 minutes before the tornado arrived). Steel beams and metal siding from the plant were found approximately three quarters of a mile east in a farm field. From the plant, the tornado continued east, just south of Illinois Route 116/117, affecting 4 farmsteads approximately 1/2 to 1 mile east of the plant. Two of the farmsteads closest to the plant (about 1/2 to 3/4 mile east) had the 2-story houses completely blown away, with only debris remaining in the basements and nearby property. The other two farmsteads had significant damage to the 2-story houses with outbuildings demolished. The center of the tornado tracked about 100 yards south of the houses located on the south side of the road. From the plant to the farmsteads, the average width of the tornado was 400 yards and was close to 1/4 mile wide at times. The greatest tornado intensity was during this approximately 1 mile stretch and has been rated F4 by the National Weather Service. At this point, the tornado began to move more east-southeast and caused significant damage to a barn near the intersection of County Roads 1300N and 1600E, about 2.5 miles southwest of Roanoke. The tornado continued to move east-southeast and damaged a house about 1.25 miles south-southwest of Roanoke, near the intersection of County Roads 1300N and 1700E. The tornado crossed 1300N shortly afterward and curved sharply to the southeast. The tornado lifted around 254 pm about 2 miles southeast of Roanoke, at County Road 1900E.
32.31974-06-22240°39'N / 89°11'W0.80 Mile100 Yards0025K0Woodford
32.61988-04-05241°11'N / 88°17'W41°16'N / 88°09'W7.00 Miles50 Yards000K0Grundy
33.22003-05-10240°41'N / 89°19'W40°49'N / 89°12'W10.50 Miles300 Yards0400Woodford
 Brief Description: As the tornado crossed from Tazewell County into Woodford County it increased in intensity. It destroyed several homes, outbuildings and businesses along US 24 before clipping the northwestern side of Eureka damaging several homes there. As it traveled to the northeast, additional homes sustained damage as well as trees, power lines, power poles, sheds and outbuildings. It moved through the extreme northern portions of Roanoke before lifting and dissipating one mile north of Roanoke. Several homes in this area sustained damage. Overall, 4 people sustained minor injuries.
33.72000-05-08240°25'N / 88°54'W40°26'N / 88°50'W4.00 Miles400 Yards04175K0Mclean
 Brief Description: A tornado touched down half a mile north of Shamrock. It traveled east northeast causing minor to moderate damage to several machine sheds and barns. The most severe damage was to a two story house 2 miles north northwest of Downs. The 3 to 5 year old house sustained major damage with the roof lifted off and two exterior walls caved in. Four family members sustained minor cuts and bruises. A neighbor's house sustained minor damage, mainly due to flying debris from the destroyed home.
34.01973-04-19241°18'N / 88°18'W00250K0Grundy
34.11974-09-12241°11'N / 89°10'W0.30 Mile600 Yards0025K0Putnam
34.11965-09-14240°49'N / 88°00'W1.00 Mile50 Yards0225K0Iroquois
34.31976-03-26240°43'N / 89°16'W0.50 Mile33 Yards00250K0Woodford
34.81975-06-14241°13'N / 89°09'W1.00 Mile167 Yards00250K0La Salle
34.91956-05-21240°43'N / 88°01'W2.00 Miles70 Yards0025K0Iroquois
35.01987-08-16241°22'N / 88°51'W1.00 Mile10 Yards00250K0La Salle
35.21974-09-12241°17'N / 89°04'W003K0La Salle
36.21973-03-31240°47'N / 87°58'W0025K0Iroquois
36.41992-06-17240°53'N / 87°57'W0.10 Mile20 Yards01250K0Iroquois
36.92004-04-20241°21'N / 89°00'W41°24'N / 88°51'W9.00 Miles400 Yards0000La Salle
 Brief Description: The tornado formed on the ridge northeast of Utica and moved across County Road 2803, west of 10th Street. A garage was destroyed and trees were damaged. The tornado became a wide multiple vortex tornado at this point. It caused damage to 2 homes, trees and outbuildings on Route 6, west of 11th Street. Part of the roof of a house was torn off. A storage building was damaged and a garage roof removed on 11th Street. A garage and grain bin were destroyed on County Road 2950. The tornado crossed I-80 at 12th Street damaging a building and flipping a semi-tractor trailer. The driver was not injured. North of I-80 a small satellite tornado formed behind the large parent tornado. It had a damage path 2 miles long and 5 to 20 yards wide. Its track was about 1/4 to 3/4 mile south of the main track. It caused no damage. The main tornado destroyed a machine shed on 13th Street and knocked down power poles. On 31st Street west of 14th big pine trees were snapped and a house suffered roof damage. A barn was destroyed on 14th north of 31st. On 32nd Street west of 15th, a two story house was hit. The top floor was mostly destroyed. A machine shed was destroyed on 16th between 32nd and 33rd. The tornado ended at 33rd and Route 23 where there was minor tree damage.
37.61976-04-23240°36'N / 88°02'W0025K0Iroquois
37.91965-11-12241°12'N / 89°18'W41°15'N / 89°08'W8.70 Miles50 Yards00250K0Putnam
38.12004-04-20341°18'N / 89°11'W41°20'N / 89°01'W9.00 Miles250 Yards8700La Salle
 Brief Description: The tornado entered LaSalle County from Putnam County, approximately 3 miles northeast of the town of Standard, producing F0 intensity damage in a wooded area southwest of Peru. As the tornado continued northeast, F2 intensity damage was done to several homes in a subdivision near the intersection of East 250th and 2569th Roads. Several roofs were blown off homes along with damage to external walls. Significant tree damage was done as well. Path width was estimated at 50 yards at this location. The tornado then continued northeast, crossing the Illinois River twice as it moved toward the town of Utica, downing a steel high tension tower on the north bank of the river, immediately west of Illinois 251. The tornado moved into the southwest side of Utica where it was F0 intensity. Homes along Washington Street only had tree and minor roof damage. A church steeple was damaged on Division between Johnson and Washington. Roofs and trees were more severely damaged on the south side of Johnson Street. The tornado rapidly increased to F3 intensity on the north side of Johnson Street where one home had its roof taken off and north walls blown out. A machinery building was completely destroyed on the south side of the canal and a semi-tractor trailer was blown into the canal. A large grain bin was blown across the canal and flattened. The tornado then moved north of the canal into the heart of town where several homes were severely damaged, garages were destroyed and brick buildings collapsed. Eight people died and seven were rescued from the basement of a turn of the century sandstone building at Clark and Church Streets. The tornado was approximately 250 yards wide at this point. On the east edge of the vortex along Mill Street, in downtown, buildings suffered damage to facades, roofs and windows. East of Mill Street there was damage to trees and minor roof damage. In the northeast section of town a mobile home was overturned on Grove, just east of Mill Street. The vortex crossed the railroad tracks and apparently dissipated on a steep bluff on the northeast side of town. At the top of the hill there were some trees and limbs down and some debris deposited. See Storm Data for Northwest and Central Illinois for results of Tornado Damage Survey for Putnam and Bureau Counties, IL M63BU, F41BU, F67BU, F81BU, M18BU, M49BU, F50BU, M47BU
38.32010-06-05240°45'N / 89°23'W40°45'N / 89°20'W2.00 Miles250 Yards0070K0KWoodford
 Brief Description: EVENT NARRATIVE: A tornado crossed into Woodford County from Tazewell County approximately 3.2 miles south-southwest of Metamora. Several trees were snapped, five power poles were damaged, the metal roof of a barn was lifted off and windows were broken on a house. The tornado lifted 2.6 miles south-southeast of Metamora. 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.
38.41954-04-07341°00'N / 88°13'W41°15'N / 87°45'W29.60 Miles400 Yards113250K0Kankakee
38.51959-09-26241°19'N / 89°08'W41°21'N / 89°02'W5.10 Miles33 Yards0025K0La Salle
38.71990-06-22241°01'N / 87°56'W41°00'N / 87°55'W1.00 Mile100 Yards00250K0Kankakee
38.92008-06-07241°12'N / 88°12'W41°20'N / 88°00'W14.00 Miles200 Yards00500K0KWill
 Brief Description: EVENT NARRATIVE: A tornado touched down in far northwest Kankakee County then crossed County Line Road into Will County north of Essex. Tree tops were sheared off at Essex and Cooper Roads. A clear path could be seen in the trees at McGuire Road. At Route 113 and Smiley Road near Custer Park, trees were snapped and uprooted. Across the Kankakee River, a two story house had its roof completely removed and there was extensive tree damage. The tornado reached EF2 intensity at this point. The tornado continued across Route 102 near Ritchie where trees were damaged. The tornado crossed old Chicago Road near Kahler Road where power lines were blown down, a shed and barn were damaged and there was minor damage to a house. Another shed was destroyed. The tornado weakened as it moved from Symerton and Kennedy Roads to Warner Bridge and Arsenal Roads. There was no damage except to one tree. There was minor damage to a barn and tree limbs north of Arsenal Road before the tornado dissipated. EPISODE NARRATIVE: A single supercell thunderstorm developed over western Illinois and moved northeast reaching Lake Michigan near the Illinois Indiana state line several hours later. This single thunderstorm produced eight different tornadoes as it moved east across Illinois.
38.91954-05-31240°40'N / 88°06'W40°53'N / 87°44'W24.20 Miles400 Yards02250K0Iroquois
39.21967-01-24240°40'N / 89°23'W40°42'N / 89°19'W3.30 Miles77 Yards003K0Tazewell
39.71990-06-22241°00'N / 87°55'W40°59'N / 87°53'W2.00 Miles100 Yards00250K0Iroquois
39.71967-01-24240°48'N / 89°24'W2.50 Miles73 Yards0025K0Mclean
39.71960-06-05240°21'N / 88°31'W40°19'N / 88°20'W9.60 Miles33 Yards0025K0Mclean
39.81969-10-10240°38'N / 89°20'W1.00 Mile200 Yards00250K0Tazewell
39.81956-03-06340°38'N / 88°00'W40°44'N / 87°52'W9.40 Miles500 Yards06250K0Iroquois
40.02010-06-05240°45'N / 89°24'W40°45'N / 89°23'W1.00 Mile250 Yards00560K30KTazewell
 Brief Description: EVENT NARRATIVE: A tornado touched down 2.9 miles north of Washington in northern Tazewell County, then continued eastward to the Tazewell-Woodford County line. Numerous trees and power poles were snapped along the path of the tornado. Three large outbuildings and two hog sheds were destroyed. In addition, the roof of a farm house was lifted off, the roof of another house was severely damaged, a garage was destroyed, and a grain bin was blown one quarter of a mile into a field. The tornado then continued eastward into Woodford 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.
40.31965-11-12241°24'N / 88°28'W41°27'N / 88°15'W11.40 Miles120 Yards0025.0M0Grundy
40.72004-04-20241°15'N / 89°17'W41°18'N / 89°11'W6.80 Miles880 Yards058.0M0Putnam
 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.
41.41960-06-04240°32'N / 89°05'W40°03'N / 88°28'W46.50 Miles20 Yards00250K0Mclean
41.61982-04-02341°03'N / 87°59'W41°12'N / 87°51'W12.00 Miles750 Yards01525.0M0Kankakee
42.41965-11-12240°18'N / 88°54'W0.30 Mile10 Yards0025K0Mclean
43.81967-04-21241°15'N / 89°20'W0.30 Mile30 Yards013K0Putnam
44.41956-08-13340°42'N / 89°30'W40°41'N / 89°25'W3.80 Miles27 Yards0025K0Tazewell
44.91978-06-25241°32'N / 88°41'W0.90 Mile300 Yards0025K0La Salle
45.31963-04-17441°11'N / 88°06'W41°08'N / 87°37'W25.20 Miles130 Yards1502.5M0Kankakee
45.61976-04-23240°34'N / 87°53'W0025K0Iroquois
46.51972-07-17341°04'N / 89°38'W41°08'N / 89°21'W15.20 Miles200 Yards002.5M0Marshall
46.71988-04-05241°16'N / 88°09'W41°30'N / 87°56'W23.00 Miles50 Yards000K0Will
46.91996-04-19340°21'N / 89°15'W40°22'N / 89°11'W4.80 Miles880 Yards001.0M0Mclean
 Brief Description: A tornado touched down just south of the Logan/Tazewell County line (on 1350E), causing minor damage to three homes. Then the tornado travelled to the northeast, through the south side of Armington, destroying one home as well as several outbuildings. Also, 2 homes sustained major damage and 5 homes sustained minor damage. After moving through the Armington area, the tornado moved into southwestern McLean County. Here it destroyed a church and one home and caused major damage to another home in the area. Also, 8 homes sustained minor damage and numerous barns, outbuildings, grain bins, trees, and farm equipment were either damaged or destroyed. No injuries were reported. Damage was estimated around $15,000 in Logan County, $1 million in Tazewell County, and around $1 million in McLean County.
47.71969-09-04241°01'N / 87°45'W2.50 Miles33 Yards0025K0Kankakee
48.91977-05-05440°16'N / 89°14'W40°20'N / 89°07'W7.30 Miles33 Yards002.5M0De Witt
49.41951-12-06341°20'N / 89°11'W41°39'N / 89°07'W21.90 Miles150 Yards11250K0Bureau
49.71951-11-13240°12'N / 89°43'W40°36'N / 88°59'W47.40 Miles50 Yards0025K0Mason
49.91960-05-25240°39'N / 89°33'W0025K0Tazewell


* 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.


 
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