Severe · Severe Thunderstorm WatchActive alert

Severe Thunderstorm Watch issued September 6 at 4:45PM CDT until September 6

Affecting Adair, IA; Adams, IA; Audubon, IA; Boone, IA; Cass, IA; Clarke, IA; Dallas, IA; Decatur, IA; Greene, IA; Guthrie, IA; Madison, IA; Polk, IA; Ringgold, IA; Taylor, IA; Union, IA; Warren, IA

In effect until: Sep 7, 2026, 3:00 AM

Adair, IA; Adams, IA; Audubon, IA; Boone, IA; Cass, IA; Clarke, IA; Dallas, IA; Decatur, IA; Greene, IA; Guthrie, IA; Madison, IA; Polk, IA; Ringgold, IA; Taylor, IA; Union, IA; Warren, IA

Possible impact zone across 16 counties in IA; conditions develop through 3:00 AM.

Go indoors and stay away from windows until the storm passes.

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Read the original bulletin (official text)

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
661 IN EFFECT UNTIL 10 PM CDT THIS EVENING FOR THE FOLLOWING
AREAS

IN IOWA THIS WATCH INCLUDES 16 COUNTIES

IN CENTRAL IOWA

BOONE                 DALLAS                POLK

IN SOUTH CENTRAL IOWA

CLARKE                DECATUR               MADISON
RINGGOLD              UNION                 WARREN

IN SOUTHWEST IOWA

ADAIR                 ADAMS                 CASS
TAYLOR

IN WEST CENTRAL IOWA

AUDUBON               GREENE                GUTHRIE

THIS INCLUDES THE CITIES OF ADAIR, ADEL, ATLANTIC, AUDUBON,
BAYARD, BEDFORD, BOONE, CARLISLE, CASEY, CORNING, CRESTON,
DES MOINES, EARLHAM, EXIRA, FONTANELLE, GREENFIELD,
GUTHRIE CENTER, INDIANOLA, JEFFERSON, LAMONI, LENOX, LEON,
MOUNT AYR, NEW MARKET, NORWALK, OSCEOLA, PANORA, PERRY, STUART,
WAUKEE, AND WINTERSET.

* PRIMARY THREATS INCLUDE...

SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE.
ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE.

PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES                        : <05%
PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES       : <02%
PROB OF 10 OR MORE SEVERE WIND EVENTS              :  40%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH            :  20%
PROB OF 10 OR MORE SEVERE HAIL EVENTS              :  30%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES          :  20%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS :  80%
MEAN STORM MOTION /MPH/                            :  E 15

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Severe Thunderstorm Watch issued September 6 at 4:45PM CDT until September 6

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