Severe Thunderstorm Watch for Black Hawk, IA; Bremer, IA; Butler, IA +14 more

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THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 597 IN EFFECT UNTIL MIDNIGHT CDT TONIGHT FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 17 COUNTIES IN CENTRAL IOWA GRUNDY HAMILTON HARDIN WEBSTER IN NORTH CENTRAL IOWA BUTLER CERRO GORDO FRANKLIN HANCOCK HUMBOLDT KOSSUTH WRIGHT IN NORTHEAST IOWA BLACK HAWK BREMER IN NORTHWEST IOWA EMMET PALO ALTO POCAHONTAS IN WEST CENTRAL IOWA CALHOUN THIS INCLUDES THE CITIES OF ACKLEY, ALGONA, ALLISON, APLINGTON, BELMOND, BRITT, CEDAR FALLS, CLARION, CLARKSVILLE, CLEAR LAKE, CONRAD, DIKE, DUMONT, EAGLE GROVE, ELDORA, EMMETSBURG, ESTHERVILLE, FONDA, FORT DODGE, GARNER, GILMORE CITY, GREENE, GRUNDY CENTER, HAMPTON, HUMBOLDT, IOWA FALLS, KANAWHA, LAKE CITY, LAURENS, MANSON, MASON CITY, PARKERSBURG, POCAHONTAS, POMEROY, REINBECK, ROCKWELL CITY, ROLFE, SHELL ROCK, WATERLOO, WAVERLY, WEBSTER CITY, AND WELLSBURG. * PRIMARY THREATS INCLUDE... SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE. SCATTERED DAMAGING WIND GUSTS TO 70 MPH 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 : 40% PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : 30% PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : 70% MEAN STORM MOTION /MPH/ : SE 30