THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
370 IN EFFECT UNTIL 11 PM CDT THIS EVENING FOR THE FOLLOWING
AREAS

IN IOWA THIS WATCH INCLUDES 41 COUNTIES

IN CENTRAL IOWA

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

IN NORTH CENTRAL IOWA

BUTLER                CERRO GORDO           FRANKLIN
WRIGHT

IN NORTHEAST IOWA

BLACK HAWK            BREMER

IN SOUTH CENTRAL IOWA

APPANOOSE             CLARKE                DECATUR
LUCAS                 MADISON               MAHASKA
MARION                MONROE                RINGGOLD
UNION                 WARREN                WAYNE

IN SOUTHEAST IOWA

DAVIS                 WAPELLO

IN SOUTHWEST IOWA

ADAIR                 ADAMS                 CASS
TAYLOR

IN WEST CENTRAL IOWA

AUDUBON               CALHOUN               CARROLL
GREENE                GUTHRIE

THIS INCLUDES THE CITIES OF ACKLEY, ADAIR, ADEL, ALBIA, ALLERTON,
ALLISON, AMES, APLINGTON, ATLANTIC, AUDUBON, BAYARD, BEDFORD,
BELMOND, BLOOMFIELD, BOONE, CARLISLE, CARROLL, CASEY,
CEDAR FALLS, CENTERVILLE, CHARITON, CLARION, CLARKSVILLE,
CLEAR LAKE, CONRAD, CORNING, CORYDON, CRESTON, DES MOINES, DIKE,
DUMONT, DYSART, EAGLE GROVE, EARLHAM, ELDORA, EXIRA, FONTANELLE,
FORT DODGE, GLADBROOK, GREENE, GREENFIELD, GRINNELL,
GRUNDY CENTER, GUTHRIE CENTER, HAMPTON, HUMESTON, INDIANOLA,
IOWA FALLS, JEFFERSON, KNOXVILLE, LAKE CITY, LAMONI, LENOX, LEON,
MANSON, MARSHALLTOWN, MASON CITY, MOUNT AYR, NEW MARKET, NEWTON,
NORWALK, OSCEOLA, OSKALOOSA, OTTUMWA, PANORA, PARKERSBURG, PELLA,
PERRY, POMEROY, REINBECK, ROCKWELL CITY, SEYMOUR, SHELL ROCK,
STUART, TAMA, TOLEDO, TRAER, WATERLOO, WAUKEE, WAVERLY,
WEBSTER CITY, WELLSBURG, AND WINTERSET.

* 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.
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              :  50%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH            :  20%
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 :  80%
MEAN STORM MOTION /MPH/                            :  E 30