Full Notification

FFWFSD The National Weather Service in Sioux Falls has issued a

* Flash Flood Warning for... Northwestern Dickinson County in northwestern Iowa... Lyon County in northwestern Iowa... Northwestern O'Brien County in northwestern Iowa... Osceola County in northwestern Iowa... Northern Sioux County in northwestern Iowa...

* Until 1215 AM CDT.

* At 819 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. The expected rainfall rate is 2 to 4 inches in 1 hour. Additional rainfall amounts of 2 to 4 inches are possible in 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... Sheldon, Spirit Lake, Sibley, Rock Rapids, Rock Valley, Hull, Lake Park, George, Larchwood, Inwood, Okoboji, Boyden, Orleans, Doon, Ocheyedan, Little Rock, Ashton, Wahpeton, Lester and Melvin.

* AFFECTED AREAS: DICKINSON, IA ... LYON, IA ... O'BRIEN, IA ... OSCEOLA, IA ... SIOUX, IA

Instructions:

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.