⚠️ Severe Thunderstorm Watch – Appanoose, IA; Audubon, IA; Black Hawk, IA; Boone, IA; Bremer, IA; Butler, IA; Calhoun, IA; Carroll, IA; Cerro Gordo, IA; Clarke, IA; Crawford, IA; Dallas, IA; Davis, IA; Emmet, IA; Franklin, IA; Greene, IA; Grundy, IA; Guthrie, IA; Hamilton, IA; Hancock, IA; Hardin, IA; Humboldt, IA; Jasper, IA; Kossuth, IA; Lucas, IA; Madison, IA; Mahaska, IA; Marion, IA; Marshall, IA; Monroe, IA; Palo Alto, IA; Pocahontas, IA; Polk, IA; Poweshiek, IA; Sac, IA; Story, IA; Tama, IA; Wapello, IA; Warren, IA; Wayne, IA; Webster, IA; Winnebago, IA; Worth, IA; Wright, IA – Wednesday, June 17, 2026

Severe Thunderstorm Watch issued June 17 at 3:58AM CDT until June 17 at 11:00AM CDT by NWS Des Moines IA

Details

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
339 IN EFFECT UNTIL 11 AM CDT THIS MORNING FOR THE FOLLOWING
AREAS

IN IOWA THIS WATCH INCLUDES 44 COUNTIES

IN CENTRAL IOWA

BOONE DALLAS GRUNDY
HAMILTON HARDIN JASPER
MARSHALL POLK POWESHIEK
STORY TAMA WEBSTER

IN NORTH CENTRAL IOWA

BUTLER CERRO GORDO FRANKLIN
HANCOCK HUMBOLDT KOSSUTH
WINNEBAGO WORTH WRIGHT

IN NORTHEAST IOWA

BLACK HAWK BREMER

IN NORTHWEST IOWA

EMMET PALO ALTO POCAHONTAS

IN SOUTH CENTRAL IOWA

APPANOOSE CLARKE LUCAS
MADISON MAHASKA MARION
MONROE WARREN WAYNE

IN SOUTHEAST IOWA

DAVIS WAPELLO

IN WEST CENTRAL IOWA

AUDUBON CALHOUN CARROLL
CRAWFORD GREENE GUTHRIE
SAC

THIS INCLUDES THE CITIES OF ACKLEY, ADEL, ALBIA, ALGONA,
ALLERTON, ALLISON, AMES, APLINGTON, AUDUBON, BAYARD, BELMOND,
BLOOMFIELD, BOONE, BRITT, CARLISLE, CARROLL, CASEY, CEDAR FALLS,
CENTERVILLE, CHARITON, CLARION, CLARKSVILLE, CLEAR LAKE, CONRAD,
CORYDON, DENISON, DES MOINES, DIKE, DUMONT, DYSART, EAGLE GROVE,
EARLHAM, EARLY, ELDORA, EMMETSBURG, ESTHERVILLE, EXIRA, FONDA,
FOREST CITY, FORT DODGE, GARNER, GILMORE CITY, GLADBROOK, GREENE,
GRINNELL, GRUNDY CENTER, GUTHRIE CENTER, HAMPTON, HUMBOLDT,
HUMESTON, INDIANOLA, IOWA FALLS, JEFFERSON, KANAWHA, KNOXVILLE,
LAKE CITY, LAKE MILLS, LAKE VIEW, LAURENS, MANLY, MANSON,
MARSHALLTOWN, MASON CITY, NEWTON, NORTHWOOD, NORWALK, ODEBOLT,
OSCEOLA, OSKALOOSA, OTTUMWA, PANORA, PARKERSBURG, PELLA, PERRY,
POCAHONTAS, POMEROY, REINBECK, ROCKWELL CITY, ROLFE, SAC CITY,
SCHALLER, SEYMOUR, SHELL ROCK, TAMA, TOLEDO, TRAER, WALL LAKE,
WATERLOO, WAUKEE, WAVERLY, WEBSTER CITY, WELLSBURG,
AND WINTERSET.

* PRIMARY THREATS INCLUDE…

SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
INCHES IN DIAMETER POSSIBLE.
SCATTERED DAMAGING WIND GUSTS TO 60 MPH POSSIBLE.
A TORNADO OR TWO POSSIBLE.

PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES : 20%
PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES : 10%
PROB OF 10 OR MORE SEVERE WIND EVENTS : 40%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH : <05%
PROB OF 10 OR MORE SEVERE HAIL EVENTS : 50%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : 30%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : 90%
MEAN STORM MOTION /MPH/ : E 50

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