⚠️ Severe Thunderstorm Watch – Cedar, IA; Clinton, IA; Des Moines, IA; Johnson, IA; Louisa, IA; Muscatine, IA; Scott, IA; Washington, IA; Bureau, IL; Henderson, IL; Henry, IL; Mercer, IL; Putnam, IL; Rock Island, IL; Warren, IL; Whiteside, IL – Wednesday, August 12, 2026

Event	Severe Thunderstorm Watch
Severity	Severe
Urgency	Future
Certainty	Possible
Area	Cedar, IA; Clinton, IA; Des Moines, IA; Johnson, IA; Louisa, IA; Muscatine, IA; Scott, IA; Washington, IA; Bureau, IL; Henderson, IL; Henry, IL; Mercer, IL; Putnam, IL; Rock Island, IL; Warren, IL; Whiteside, IL
Effective	8/12/2026, 6:42:00 AM CDT
Expires	8/12/2026, 1:00:00 PM CDT

Severe Thunderstorm Watch issued August 12 at 6:42AM CDT until August 12 at 1:00PM CDT by NWS Quad Cities IA IL

Details

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
574 IN EFFECT UNTIL 1 PM CDT THIS AFTERNOON FOR THE FOLLOWING
AREAS

IN ILLINOIS THIS WATCH INCLUDES 8 COUNTIES

IN NORTH CENTRAL ILLINOIS

BUREAU PUTNAM

IN NORTHWEST ILLINOIS

HENRY IL MERCER ROCK ISLAND
WHITESIDE

IN WEST CENTRAL ILLINOIS

HENDERSON WARREN

IN IOWA THIS WATCH INCLUDES 8 COUNTIES

IN EAST CENTRAL IOWA

CEDAR CLINTON JOHNSON
MUSCATINE SCOTT

IN SOUTHEAST IOWA

DES MOINES LOUISA WASHINGTON

THIS INCLUDES THE CITIES OF ALEDO, BETTENDORF, BURLINGTON,
CLINTON, CREDIT ISLAND, DAVENPORT, GENESEO, HENNEPIN, IOWA CITY,
MOLINE, MONMOUTH, MUSCATINE, OQUAWKA, PRINCETON, ROCK ISLAND,
STERLING, TIPTON, WAPELLO, AND WASHINGTON.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.