Severe Thunderstorm Watch

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 437 IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING AREAS

IN IOWA THIS WATCH INCLUDES 8 COUNTIES

IN CENTRAL IOWA

GRUNDY HARDIN MARSHALL TAMA

IN NORTH CENTRAL IOWA

BUTLER FRANKLIN

IN NORTHEAST IOWA

BLACK HAWK BREMER

THIS INCLUDES THE CITIES OF ACKLEY, ALLISON, APLINGTON, CEDAR FALLS, CLARKSVILLE, CONRAD, DIKE, DUMONT, DYSART, ELDORA, GLADBROOK, GREENE, GRUNDY CENTER, HAMPTON, IOWA FALLS, MARSHALLTOWN, PARKERSBURG, REINBECK, SHELL ROCK, TAMA, TOLEDO, TRAER, WATERLOO, WAVERLY, AND WELLSBURG.

* PRIMARY THREATS INCLUDE...

SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY. SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES 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 : <02% PROB OF 10 OR MORE SEVERE WIND EVENTS : 70% 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 : 90% MEAN STORM MOTION /MPH/ : E 30