075
NOUS43 KDVN 230955
PNSDVN
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-232200-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
455 AM CDT SUN AUG 23 2026
..NWS DAMAGE SURVEY FOR 08/21/2026 TORNADO EVENT
OVERVIEW
A DUSTY, HIGHLY VISIBLE TORNADO FORMED SOUTH OF DEPUE
ILLINOIS FRIDAY EVENING, BUT CAUSED VERY LITTLE DAMAGE.
..NORTHERN PUTNAM COUNTY TORNADO
RATING: EF0
ESTIMATED PEAK WIND: 70 MPH
PATH LENGTH /STATUTE/: 1.48 MILES
PATH WIDTH /MAXIMUM/: 75 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 08/21/2026
START TIME: 07:13 PM CDT
START LOCATION: 1 S DEPUE / PUTNAM COUNTY / IL
START LAT/LON: 41.3082 / -89.2986
END DATE: 08/21/2026
END TIME: 07:20 PM CDT
END LOCATION: 3 WNW MARK / PUTNAM COUNTY / IL
END LAT/LON: 41.2879 / -89.2892
SURVEY SUMMARY:
AN EF0 TORNADO, WITH PEAK WINDS OF 70 MPH, DEVELOPED ALONG THE
SOUTHERN BANKS OF THE ILLINOIS RIVER AND MOVED TOWARDS THE SOUTH-
SOUTHEAST. THE TORNADO CROSSED THROUGH A ROCK QUARRY, WHERE IT
TIPPED OVER A PORTION OF AN INDUSTRIAL CONVEYOR SYSTEM. DESPITE
BEING ON THE GROUND FOR ONLY 1.5 MILES, TRAINED SPOTTER PHOTOS
AND VIDEO SUGGESTED IT WAS ON THE GROUND FOR SEVEN MINUTES.
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 EVENT AND PUBLICATION IN
NWS STORM DATA.
ERVIN
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