898
WWUS20 KWNS 121140
SEL4
SPC WW 121140
IAZ000-ILZ000-INZ000-121800-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 574
NWS STORM PREDICTION CENTER NORMAN OK
640 AM CDT WED AUG 12 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
EASTERN IOWA
NORTHERN AND CENTRAL ILLINOIS
NORTHWEST INDIANA
* EFFECTIVE THIS WEDNESDAY MORNING AND AFTERNOON FROM 640 AM
UNTIL 100 PM CDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
TO 75 MPH POSSIBLE
ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE
SUMMARY...A CLUSTER OF INTENSIFYING THUNDERSTORMS WILL MOVE INTO
WATCH AND POSE A RISK FOR SCATTERED SEVERE GUSTS (60 TO 75 MPH).
ISOLATED LARGE HAIL MAY ACCOMPANY THE MORE INTENSE THUNDERSTORM
CORES. THIS ACTIVITY WILL LIKELY SHIFT TO THE EAST AND SOUTHEAST
THROUGH THE MORNING AND INTO THE MIDDAY.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 60
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 45 MILES NORTH
NORTHWEST OF BURLINGTON IA TO 30 MILES NORTH NORTHEAST OF DANVILLE
IL. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES.
OTHER WATCH INFORMATION...CONTINUE...WW 573...
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A FEW
CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR
29035.
...SMITH
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