483
NOUS43 KLOT 252026
PNSLOT
ILZ003>006-008-010>013-019>021-023-032-033-039-103>108-INZ001-002-
010-011-019-260830-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
326 PM CDT TUE AUG 25 2026 /426 PM EDT TUE AUG 25 2026/
..NWS DAMAGE SURVEY FOR 08/09/2026 TORNADO EVENT - UPDATE #3
UPDATE
THIS PUBLIC INFORMATION STATEMENT UPDATE INCLUDES NEW INFORMATION
ON TWO TORNADOES CONFIRMED TO THE NORTHEAST OF STREATOR AND
NORTHWEST OF RANSOM IN SOUTHEASTERN LASALLE COUNTY AFTER A GROUND
SURVEY AND AN ANALYSIS OF HIGH-RESOLUTION SATELLITE IMAGERY.
REFINEMENTS WERE ALSO MADE TO THE OTHER TWO TORNADOES CONFIRMED
IN THE NWS CHICAGO SERVICE AREA FROM THIS SEVERE WEATHER EVENT
AFTER A REVIEW OF THIS SATELLITE IMAGERY.
OVERVIEW
MULTIPLE SUPERCELL THUNDERSTORMS DEVELOPED ACROSS NORTHERN
ILLINOIS DURING THE EVENING OF AUGUST 9TH AND PRODUCED A TOTAL OF
8 TORNADOES -- 4 OF WHICH OCCURRED IN THE NWS CHICAGO SERVICE
AREA. INFORMATION ON THESE FOUR TORNADOES IS PROVIDED BELOW.
AMBOY
RATING: EF1
ESTIMATED PEAK WIND: 90 MPH
PATH LENGTH /STATUTE/: 6.97 MILES
PATH WIDTH /MAXIMUM/: 200 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 08/09/2026
START TIME: 10:02 PM CDT
START LOCATION: 4 N SUBLETTE / LEE COUNTY / IL
START LAT/LON: 41.706 / -89.2375
END DATE: 08/09/2026
END TIME: 10:24 PM CDT
END LOCATION: 6 SSE ASHTON / LEE COUNTY / IL
END LAT/LON: 41.7818 / -89.1922
SURVEY SUMMARY:
A TORNADO BEGAN JUST EAST OF AMBOY NEAR SHAWS. THIS TORNADO
TRACKED NORTHEAST AND THEN TURNED SLIGHTLY NORTHWEST AS IT
CROSSED U.S. HIGHWAY 30 BEFORE DISSIPATING SOUTH OF PIPELINE
ROAD. THE TORNADO CAUSED DAMAGE TO TREES, POWER LINES,
OUTBUILDINGS, AND CROPS ALONG ITS NEARLY 7-MILE LONG TRACK.
STREATOR
RATING: EF1
ESTIMATED PEAK WIND: 95 MPH
PATH LENGTH /STATUTE/: 4.84 MILES
PATH WIDTH /MAXIMUM/: 500 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 08/09/2026
START TIME: 11:16 PM CDT
START LOCATION: 3 NNE STREATOR / LA SALLE COUNTY / IL
START LAT/LON: 41.164 / -88.8163
END DATE: 08/09/2026
END TIME: 11:33 PM CDT
END LOCATION: 2 NE KANGLEY / LA SALLE COUNTY / IL
END LAT/LON: 41.1706 / -88.8319
SURVEY SUMMARY:
A TORNADO BEGAN SOUTHEAST OF THE INTERSECTION OF N 17TH ROAD AND
ILLINOIS STATE ROUTE 23. IT INITIALLY TRACKED TOWARDS THE
NORTHEAST BEFORE MAKING A COUNTERCLOCKWISE LOOP AND EVENTUALLY
DISSIPATING NEAR E 18TH ROAD AND N 16TH ROAD. IT CAUSED DAMAGE TO
MULTIPLE OUTBUILDINGS, A FEW HOUSES, TREES, CROPS, AND UTILITY
POLES ALONG ITS NEARLY 5-MILE-LONG TRACK.
KERNAN
RATING: EF0
ESTIMATED PEAK WIND: 75 MPH
PATH LENGTH /STATUTE/: 5.10 MILES
PATH WIDTH /MAXIMUM/: 300 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 08/09/2026
START TIME: 11:29 PM CDT
START LOCATION: 4 NE STREATOR / LA SALLE COUNTY / IL
START LAT/LON: 41.1623 / -88.7625
END DATE: 08/09/2026
END TIME: 11:38 PM CDT
END LOCATION: 4 NE STREATOR / LA SALLE COUNTY / IL
END LAT/LON: 41.1686 / -88.7627
SURVEY SUMMARY:
THIS TORNADO BEGAN NEAR THE INTERSECTION OF N 16TH ROAD AND E
21ST ROAD NORTHEAST OF STREATOR. IT MADE A NEARLY COMPLETE 5.1-
MILE-LONG COUNTERCLOCKWISE LOOP, CAUSING DAMAGE TO TREES AND
CROPS AND PEELING SHINGLES OFF OF A HOUSE BEFORE DISSIPATING A
LITTLE LESS THAN HALF A MILE NORTH OF ITS START POINT.
RANSOM
RATING: EF1
ESTIMATED PEAK WIND: 100 MPH
PATH LENGTH /STATUTE/: 8.52 MILES
PATH WIDTH /MAXIMUM/: 650 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 08/09/2026
START TIME: 11:35 PM CDT
START LOCATION: 4 WNW RANSOM / LA SALLE COUNTY / IL
START LAT/LON: 41.1746 / -88.7282
END DATE: 08/09/2026
END TIME: 11:59 PM CDT
END LOCATION: 4 N RANSOM / LA SALLE COUNTY / IL
END LAT/LON: 41.2129 / -88.6634
SURVEY SUMMARY:
THIS TORNADO BEGAN SOUTHWEST OF THE INTERSECTION OF N 17TH ROAD
AND E 23RD ROAD NORTHWEST OF RANSOM. IT INITIALLY TRACKED
NORTHEASTWARD, THEN WESTWARD TOWARDS E 22ND ROAD, BEFORE LOOPING
BACK TOWARDS ITS START POINT. THE TORNADO APPEARED TO INCREASE
IN SIZE AS IT TRACKED EASTWARD ALONG N 17TH ROAD, BUT REMAINED AT
EF-0 INTENSITY HERE WITH DAMAGE BEING CONFINED TO TREES AND
CROPS. THE TORNADO THEN JOGGED NORTHEASTWARD, DOWNING POWER POLES
AND DAMAGING OUTBUILDINGS ALONG E 24TH ROAD BEFORE REACHING EF-1
INTENSITY AS IT DESTROYED AN OUTBUILDING ALONG N 18TH ROAD
BETWEEN E 24TH ROAD AND E 25TH ROAD. OUTBUILDINGS AND TREES WERE
DAMAGED AT A FARMSTEAD ALONG N 19TH ROAD AS THE TORNADO BEGAN TO
TURN EAST, AND ADDITIONAL DAMAGE TO CROPS AND POWER POLES
OCCURRED JUST EAST OF THIS FARMSTEAD AS WELL. THE TORNADO THEN
DERAILED SEVERAL EMPTY AUTORACK RAIL CARS EAST OF E 26TH ROAD
BEFORE CURVING BACK TOWARDS THE NORTHWEST, THEN SOUTHWEST AND
DISSIPATING NORTH THE INTERSECTION OF N 19TH ROAD AND E 26TH
ROAD.
EF SCALE: THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO THE
FOLLOWING CATEGORIES:
EF0.....65 TO 85 MPH
EF1.....86 TO 110 MPH
EF2.....111 TO 135 MPH
EF3.....136 TO 165 MPH
EF4.....166 TO 200 MPH
EF5.....>200 MPH
NOTE:
THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENTS AND PUBLICATION IN
NWS STORM DATA.
NWS CHICAGO
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