WWUS63 KDMX 211825
WCNDMX

WATCH COUNTY NOTIFICATION FOR WATCHES 275/277
NATIONAL WEATHER SERVICE DES MOINES IA
125 PM CDT TUE MAY 21 2024

IAC003-007-013-039-051-053-117-121-123-125-135-157-159-171-173-
175-179-181-185-220200-
/O.EXP.KDMX.SV.A.0275.000000T0000Z-240521T1800Z/
/O.NEW.KDMX.TO.A.0277.240521T1825Z-240522T0200Z/

THE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 277 UNTIL
9 PM CDT THIS EVENING. SEVERE THUNDERSTORM WATCH 275 HAS EXPIRED.
THE NEW WATCH IS VALID FOR THE FOLLOWING AREAS

IN IOWA THE NEW WATCH INCLUDES 19 COUNTIES

IN CENTRAL IOWA

POWESHIEK             TAMA

IN NORTHEAST IOWA

BLACK HAWK

IN SOUTH CENTRAL IOWA

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

IN SOUTHEAST IOWA

DAVIS                 WAPELLO

IN SOUTHWEST IOWA

ADAMS                 TAYLOR

THIS INCLUDES THE CITIES OF ALBIA, ALLERTON, BEDFORD, BLOOMFIELD,
CARLISLE, CEDAR FALLS, CENTERVILLE, CHARITON, CORNING, CORYDON,
CRESTON, DYSART, EARLHAM, GLADBROOK, GRINNELL, HUMESTON,
INDIANOLA, KNOXVILLE, LAMONI, LENOX, LEON, MOUNT AYR, NEW MARKET,
NORWALK, OSCEOLA, OSKALOOSA, OTTUMWA, PELLA, SEYMOUR, TAMA,
TOLEDO, TRAER, WATERLOO, AND WINTERSET.

$$

IAC001-009-015-017-023-025-027-029-033-047-049-063-069-073-075-
077-079-081-083-091-099-109-127-147-151-153-161-169-187-189-195-
197-220200-
/O.NEW.KDMX.TO.A.0277.240521T1825Z-240522T0200Z/

THE NATIONAL WEATHER SERVICE HAS ISSUED TORNADO WATCH 277 IN
EFFECT UNTIL 9 PM CDT THIS EVENING FOR THE FOLLOWING AREAS

IN IOWA THIS WATCH INCLUDES 32 COUNTIES

IN CENTRAL IOWA

BOONE                 DALLAS                GRUNDY
HAMILTON              HARDIN                JASPER
MARSHALL              POLK                  STORY
WEBSTER

IN NORTH CENTRAL IOWA

BUTLER                CERRO GORDO           FRANKLIN
HANCOCK               HUMBOLDT              KOSSUTH
WINNEBAGO             WORTH                 WRIGHT

IN NORTHEAST IOWA

BREMER

IN NORTHWEST IOWA

EMMET                 PALO ALTO             POCAHONTAS

IN SOUTHWEST IOWA

ADAIR                 CASS

IN WEST CENTRAL IOWA

AUDUBON               CALHOUN               CARROLL
CRAWFORD              GREENE                GUTHRIE
SAC

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

...THIS IS A PARTICULARLY DANGEROUS SITUATION. STRONG LONG LIVED
TORNADOES MAY OCCUR...

* PRIMARY THREATS INCLUDE...

 SEVERAL TORNADOES AND A FEW INTENSE TORNADOES LIKELY.
 WIDESPREAD DAMAGING WINDS AND ISOLATED SIGNIFICANT GUSTS TO 90
   MPH LIKELY.
 SCATTERED LARGE HAIL LIKELY WITH ISOLATED VERY LARGE HAIL EVENTS
   TO 4 INCHES IN DIAMETER POSSIBLE.

PROBABILITY TABLE:
PROB OF 2 OR MORE TORNADOES                        :  90%
PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES       :  80%
PROB OF 10 OR MORE SEVERE WIND EVENTS              :  80%
PROB OF 1 OR MORE WIND EVENTS >= 75 MPH            :  60%
PROB OF 10 OR MORE SEVERE HAIL EVENTS              :  60%
PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES          :  50%
PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : >95%
MEAN STORM MOTION /MPH/                            :  NE 50

$$