FFWDMX

The National Weather Service in Des Moines has issued a

* Flash Flood Warning for...
Northern Grundy County in central Iowa...
Northern Hardin County in central Iowa...
Southern Butler County in north central Iowa...
Southern Franklin County in north central Iowa...
Southeastern Wright County in north central Iowa...

* Until 915 AM CDT Tuesday.

* At 309 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
2 and 3 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible in the warned area. Flash flooding is
ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar and automated gauges.

IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
Iowa Falls, Parkersburg, Ackley, Shell Rock, Dike, Aplington,
Alden, Wellsburg, Dows, New Hartford, Steamboat Rock, Stout,
Geneva, Buckeye, Bradford, Popejoy, Owasa, Ackley Municipal
Airport and Iowa Falls Municipal Airport.

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

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

* WHERE...Portions of central, north central, northeast, northwest,
south central, southwest, and west central Iowa, including the
following counties, in central Iowa, Boone, Dallas, Grundy,
Hamilton, Hardin, Jasper, Marshall, Polk, Poweshiek, Story, Tama
and Webster. In north central Iowa, Butler, Cerro Gordo, Franklin,
Hancock, Humboldt, Kossuth, Winnebago, Worth and Wright. In
northeast Iowa, Black Hawk and Bremer. In northwest Iowa, Emmet,
Palo Alto and Pocahontas. In south central Iowa, Madison, Mahaska,
Marion and Warren. In southwest Iowa, Adair and Cass. In west
central Iowa, Audubon, Calhoun, Carroll, Crawford, Greene, Guthrie
and Sac.

* WHEN...Through 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...
- 3 to 5 inches of rain have already fallen over portions of
northern and north central Iowa. Slow moving storms with
efficient rainfall rates will continue through the early
morning hours, and could impact the morning commute.

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.