918
WWUS20 KWNS 310218
SEL7
SPC WW 310218
IAZ000-ILZ000-WIZ000-LMZ000-310800-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 77
NWS STORM PREDICTION CENTER NORMAN OK
920 PM CDT MON MAR 30 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
IOWA
NORTHERN ILLINOIS
SOUTHERN WISCONSIN
LAKE MICHIGAN
* EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 920 PM
UNTIL 300 AM CDT.
* PRIMARY THREATS INCLUDE...
SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2
INCHES IN DIAMETER POSSIBLE
ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE
SUMMARY...SCATTERED STRONG TO SEVERE THUNDERSTORMS WILL INCREASE
THROUGH LATE EVENING INTO THE OVERNIGHT ACROSS THE REGION. LARGE
HAIL IS EXPECTED TO BE THE MOST COMMON SEVERE HAZARD, BUT ISOLATED
DAMAGING WINDS COULD ALSO OCCUR.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 50
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST
OF DES MOINES IA TO 45 MILES SOUTH SOUTHEAST OF RACINE WI. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).
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.
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A
FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR
26030.
...GUYER
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