Weather Watch Clearance Notification
Issued by NWS Des Moines, IA

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WATCH COUNTY NOTIFICATION FOR WATCH 456
NATIONAL WEATHER SERVICE DES MOINES IA
451 PM CDT FRI AUG 18 2017

IAC001-009-015-023-025-027-033-049-063-069-073-075-077-079-081-
083-091-099-109-121-123-125-127-147-151-153-157-161-169-171-181-
187-189-195-197-190600-
/O.NEW.KDMX.SV.A.0456.170818T2151Z-170819T0600Z/

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH
456 IN EFFECT UNTIL 1 AM CDT SATURDAY FOR THE FOLLOWING AREAS

IN IOWA THIS WATCH INCLUDES 35 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 NORTHWEST IOWA

EMMET                 PALO ALTO             POCAHONTAS

IN SOUTH CENTRAL IOWA

MADISON               MAHASKA               MARION
WARREN

IN SOUTHWEST IOWA

ADAIR

IN WEST CENTRAL IOWA

AUDUBON               CALHOUN               CARROLL
GREENE                GUTHRIE               SAC

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

* PRIMARY THREATS INCLUDE...

 ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE.
 ISOLATED LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE.

PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES                        :  10%
PROB OF 1 OR MORE STRONG /F2-F5/ TORNADOES         :  10%
PROB OF 10 OR MORE SEVERE WIND EVENTS              :  30%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH            :  10%
PROB OF 10 OR MORE SEVERE HAIL EVENTS              :  20%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES          :  10%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS :  70%
MEAN STORM MOTION /MPH/                            :  SE 40

$$

ANSORGE



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