Headline:
Severe Thunderstorm Watch issued August 13 at 5:51AM CDT until August 13 at 11:00AM CDT by NWS Des Moines IA
Event:
Severe Thunderstorm Watch
Urgency:
Future
Effective:
August 13, 2026 - 3:51am
Expires:
August 13, 2026 - 9:00am
Description:
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
581 IN EFFECT UNTIL 11 AM CDT THIS MORNING FOR THE FOLLOWING
AREAS
IN IOWA THIS WATCH INCLUDES 20 COUNTIES
IN CENTRAL IOWA
BOONE DALLAS GRUNDY
HAMILTON HARDIN JASPER
MARSHALL POLK POWESHIEK
STORY TAMA WEBSTER
IN SOUTH CENTRAL IOWA
CLARKE LUCAS MADISON
MAHASKA MARION MONROE
WARREN
IN SOUTHEAST IOWA
WAPELLO
THIS INCLUDES THE CITIES OF ACKLEY, ADEL, ALBIA, AMES, BOONE,
CARLISLE, CHARITON, CONRAD, DES MOINES, DIKE, DYSART, EARLHAM,
ELDORA, FORT DODGE, GLADBROOK, GRINNELL, GRUNDY CENTER,
INDIANOLA, IOWA FALLS, KNOXVILLE, MARSHALLTOWN, NEWTON, NORWALK,
OSCEOLA, OSKALOOSA, OTTUMWA, PELLA, PERRY, REINBECK, TAMA,
TOLEDO, TRAER, WAUKEE, WEBSTER CITY, WELLSBURG, AND WINTERSET.
* PRIMARY THREATS INCLUDE...
SCATTERED DAMAGING WINDS LIKELY WITH ISOLATED SIGNIFICANT GUSTS
TO 75 MPH POSSIBLE.
ISOLATED LARGE HAIL EVENTS TO 1 INCH IN DIAMETER POSSIBLE.
A TORNADO OR TWO POSSIBLE.
PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES : 20%
PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES : 05%
PROB OF 10 OR MORE SEVERE WIND EVENTS : 60%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH : 30%
PROB OF 10 OR MORE SEVERE HAIL EVENTS : 20%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES :
Area Description:
Boone, IA; Clarke, IA; Dallas, IA; Grundy, IA; Hamilton, IA; Hardin, IA; Jasper, IA; Lucas, IA; Madison, IA; Mahaska, IA; Marion, IA; Marshall, IA; Monroe, IA; Polk, IA; Poweshiek, IA; Story, IA; Tama, IA; Wapello, IA; Warren, IA; Webster, IA
Forcast Office:
NWS Des Moines IA
Sender:
w-nws.webmaster@noaa.gov