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

* WHAT...Flash flooding caused by excessive rainfall continues to be
possible.

* WHERE...Much of central Iowa.

* WHEN...Until 7 PM CDT this evening.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS...
- Rainfall of 3 to 5 inches with isolated higher amounts fell
over parts of central Iowa last night into this morning and
led to flash flooding in some areas. Additional round of
storms is expected this afternoon that may cause new flash
flooding or prolong or renew flash flooding in areas that
experienced flash flooding earlier.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

For the latest river and stream observations and forecasts refer to
weather.gov/desmoines/water.