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Active official alertUpdated

Severe Thunderstorm Watch for Adair, IA; Adams, IA; Audubon, IA +13 more

Official alert fields

What you need to know

Applies to
Adair, Adams, Audubon, Boone, Cass, Clarke, Dallas, Decatur and 8 more
Effective
Ends or expires
Official severity
Severe
Official urgency
Future
Official certainty
Possible

What is happening

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 661 IN EFFECT UNTIL 10 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 16 COUNTIES IN CENTRAL IOWA BOONE DALLAS POLK IN SOUTH CENTRAL IOWA CLARKE DECATUR MADISON RINGGOLD UNION WARREN IN SOUTHWEST IOWA ADAIR ADAMS CASS TAYLOR...

What the bulletin says to do

No separate action instruction was included in this NWS record. Read the complete official bulletin and follow local authorities.

Full official description

Bulletin details

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 661 IN EFFECT UNTIL 10 PM CDT THIS EVENING FOR THE FOLLOWING AREAS IN IOWA THIS WATCH INCLUDES 16 COUNTIES IN CENTRAL IOWA BOONE DALLAS POLK IN SOUTH CENTRAL IOWA CLARKE DECATUR MADISON RINGGOLD UNION WARREN IN SOUTHWEST IOWA ADAIR ADAMS CASS TAYLOR IN WEST CENTRAL IOWA AUDUBON GREENE GUTHRIE THIS INCLUDES THE CITIES OF ADAIR, ADEL, ATLANTIC, AUDUBON, BAYARD, BEDFORD, BOONE, CARLISLE, CASEY, CORNING, CRESTON, DES MOINES, EARLHAM, EXIRA, FONTANELLE, GREENFIELD, GUTHRIE CENTER, INDIANOLA, JEFFERSON, LAMONI, LENOX, LEON, MOUNT AYR, NEW MARKET, NORWALK, OSCEOLA, PANORA, PERRY, STUART, WAUKEE, AND WINTERSET. * PRIMARY THREATS INCLUDE... SCATTERED 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 : <05% PROB OF 1 OR MORE STRONG /EF2-EF5/ TORNADOES : <02% PROB OF 10 OR MORE SEVERE WIND EVENTS : 40% PROB OF 1 OR MORE WIND EVENTS >= 75 MPH : 20% PROB OF 10 OR MORE SEVERE HAIL EVENTS : 30% PROB OF 1 OR MORE HAIL EVENTS >= 2 INCHES : 20% PROB OF 6 OR MORE COMBINED SEVERE HAIL/WIND EVENTS : 80% MEAN STORM MOTION /MPH/ : E 15

Official geometry where available

Alert boundary

Lifecycle record

Official revisions

1 captured
  1. Alert

    Severe Thunderstorm Watch issued September 6 at 4:45PM CDT until September 6 at 10:00PM CDT by NWS Des Moines IA

    Official revision

Source and limitations

Publisher: Weather Alert Watch. Primary source: NWS Des Moines IA. This page reorganizes official fields and does not add a forecast or expand the affected area.

CAP status
Actual
Message type
Alert
Last collected
Methodology and corrections