066
WWUS20 KWNS 202236
SEL4
SPC WW 202236
IAZ000-ILZ000-MOZ000-210400-
URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 504
NWS STORM PREDICTION CENTER NORMAN OK
540 PM CDT MON JUL 20 2026
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
EAST CENTRAL IOWA
NORTHWEST ILLINOIS
NORTHEAST MISSOURI
* EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 540 PM UNTIL
1100 PM CDT.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 80
MPH LIKELY
ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE
SUMMARY...A FAST-MOVING BOWING LINE OF THUNDERSTORMS OVER EASTERN
IOWA WILL TRACK SOUTHEASTWARD ACROSS THE WATCH AREA THIS EVENING,
WITH A RISK OF SEVERE WIND GUSTS AND HAIL.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES EITHER SIDE OF A LINE FROM 45 MILES NORTH NORTHWEST OF
BURLINGTON IA TO 15 MILES EAST SOUTHEAST OF PEORIA 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 500...WW 501...
AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO
2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A
FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR
30035.
...HART
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page