THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH581 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 : <05% PROB OF 6 OR MORE COMBINED SEVERE HAIL WIND EVENTS : 80% MEAN STORM MOTION MPH : E 50