260
NOUS43 KDVN 241920
PNSDVN
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-250730-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
220 PM CDT MON AUG 24 2026
..NWS DAMAGE SURVEY FOR 08/21/2026 TORNADO EVENT -- UPDATED
OVERVIEW
A DUSTY AND HIGHLY VISIBLE TORNADO FORMED SOUTH OF
DEPUE, ILLINOIS FRIDAY EVENING, RESULTING IN MINOR DAMAGE AS IT
TRACKED SLOWLY THROUGH PUTNAM COUNTY. ADDITIONAL MINOR DAMAGE
REPORTS FROM EMERGENCY MANAGEMENT AS WELL AS REVIEW OF NEW
TRAINED SPOTTER VIDEOS AND PHOTOS HAVE RESULTED IN AN EXTENSION
OF THE INITIAL PATH WITH A SLIGHT INCREASE IN ESTIMATED PEAK
WIND SPEEDS.
DEPUE-HENNEPIN TORNADO
RATING: EF0
ESTIMATED PEAK WIND: 80 MPH
PATH LENGTH /STATUTE/: 4.3 MILES
PATH WIDTH /MAXIMUM/: 100 YARDS
FATALITIES: 0
INJURIES: 0
START DATE: 08/21/2026
START TIME: 07:11 PM CDT
START LOCATION: 1 S DEPUE / PUTNAM COUNTY / IL
START LAT/LON: 41.3046 / -89.3166
END DATE: 08/21/2026
END TIME: 07:26 PM CDT
END LOCATION: 3 E HENNEPIN / PUTNAM COUNTY / IL
END LAT/LON: 41.2563 / -89.2847
SURVEY SUMMARY:
A SLOW MOVING EF0 TORNADO, WITH PEAK WINDS OF 80 MPH, DEVELOPED
ALONG THE SOUTHERN BANKS OF THE ILLINOIS RIVER AND MOVED TOWARDS THE
EAST-SOUTHEAST. THE TORNADO CROSSED THROUGH A ROCK QUARRY WHERE IT
TIPPED OVER A PORTION OF AN INDUSTRIAL CONVEYOR SYSTEM. THE TORNADO
THEN TURNED MORE SOUTH-SOUTHEAST AND GRADUALLY WEAKENED, PRODUCING
SPORADIC TREE DAMAGE ALONG AN INTERMITTENT PATH BEFORE COMPLETELY
DISSIPATING NEAR ILLINOIS HIGHWAY 71.
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.
ZU/MF/AE/JS/CD
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