FFWDMX

The National Weather Service in Des Moines has issued a

* Flash Flood Warning for...
Grundy County in central Iowa...
Southeastern Hardin County in central Iowa...
Northern Marshall County in central Iowa...
Northern Tama County in central Iowa...
Black Hawk County in northeastern Iowa...
Southern Bremer County in northeastern Iowa...

* Until 300 PM CDT Tuesday.

* At 857 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

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...
Waterloo, Cedar Falls, Waverly, Eldora, Grundy Center, Evansdale,
La Porte City, Hudson, Denver, Traer, Reinbeck, Dysart, Dike, Elk
Run Heights, Conrad, Uni-Dome And McLeod Center, Waterloo
Municipal Airport, Crossroads Mall, Gladbrook and Janesville.

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

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

* 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.