369
FLUS43 KDVN 200821
HWODVN
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
321 AM CDT MON JUL 20 2026
IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-210830-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
321 AM CDT MON JUL 20 2026
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST
CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST
MISSOURI.
DAY ONE
TODAY AND TONIGHT
HOT AND HUMID CONDITIONS ARE EXPECTED TODAY WITH PEAK HEAT INDEX
READINGS BETWEEN 95 TO 105 DEGREES. A HEAT ADVISORY HAS BEEN
ISSUED FOR PORTIONS OF THE OUTLOOK AREA, WEST AND SOUTHWEST OF THE
QUAD CITIES.
THUNDERSTORMS WILL BE SEEN TODAY IN TWO ROUNDS; ONE DURING THE
MORNING AND THE SECOND, MORE WIDESPREAD ROUND LATE THIS AFTERNOON
AND INTO TONIGHT.
THE STORM PREDICTION CENTER HAS AN ENHANCED, LEVEL 3 OUT OF 5,
RISK OF SEVERE STORMS ALONG AND NORTH OF INTERSTATE 80. SOUTH OF
INTERSTATE 80, A SLIGHT, LEVEL 2 OUT OF 5, RISK OF SEVERE STORMS
EXISTS.
THE MORNING ROUND OF STORMS WILL BE MAINLY NON-SEVERE, BUT, AN
ISOLATED SEVERE STORM WITH GUSTY WINDS CANNOT BE RULED OUT.
THE LATE AFTERNOON AND EVENING ROUND OF STORMS ARE EXPECTED TO BE
STRONG TO SEVERE. WHEN THIS ROUND OF STORMS DEVELOPS, ALL MODES
OF SEVERE WEATHER ARE POSSIBLE WITH SUPERCELLS, INCLUDING
TORNADOES. AS THE STORMS QUICKLY GROW UPSCALE INTO ORGANIZED
CLUSTERS, THE MAIN SEVERE RISK WILL TRANSITION TO DAMAGING WINDS,
POTENTIALLY OVER 75 MPH, WITH BRIEF SPIN-UP TORNADOES AS A
SECONDARY RISK.
DAYS TWO THROUGH SEVEN
TUESDAY THROUGH SUNDAY
THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.
SPOTTER INFORMATION STATEMENT
SPOTTER ACTIVATION IS EXPECTED THIS AFTERNOON AND EVENING.
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