Active Weather Alerts
Flash Flood Warning
Issued: 10:24 AM Jul. 20, 2025 – National Weather Service
The National Weather Service in Des Moines has issued a * Flash Flood Warning for... Jasper County in central Iowa... Southwestern Poweshiek County in central Iowa... Northern Mahaska County in south central Iowa... Northern Marion County in south central Iowa... * Until 1130 AM CDT Sunday. * At 523 AM CDT, emergency management reported thunderstorms producing heavy rain across the warned area. Between 1 and 2 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is already occurring. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Emergency management reported. 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... Newton, Pella, Grinnell, Montezuma, Mitchellville, Colfax, Monroe, Prairie City, Brooklyn, New Sharon, Rock Creek Lake, Iowa Speedway, Sully, Kellogg, Lynnville, Malcom, Barnes City, Lambs Grove, Oakland Acres and Reasnor. PRECAUTIONARY/PREPAREDNESS ACTIONS... For the latest waterway observations and forecasts refer to weather.gov/desmoines/water. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && FLASH FLOOD...OBSERVED
Flood Watch
Issued: 7:03 AM Jul. 20, 2025 – National Weather Service
...FLOOD WATCH REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of central, northeast, south central, southeast, 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 northeast Iowa, Black Hawk. In south central Iowa, Clarke, Lucas, Madison, Mahaska, Marion, Monroe and Warren. In southeast Iowa, Davis and Wapello. In southwest Iowa, Adair and Cass. In west central Iowa, Audubon, Calhoun, Carroll, Crawford, Greene, Guthrie and Sac. * WHEN...Until 10 AM CDT this morning. * 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. Significant ponding may also occur. * ADDITIONAL DETAILS... - Thunderstorms producing heavy to very heavy rainfall are possible tonight. Intense rainfall rates are likely with any storms having the potential to produce 1 to 2 inches of rainfall over a short time period. Total rainfall amounts of 2 to 5 inches may occur in some areas with the potential to exceed 5 inches in a few areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... For the latest waterway observations and forecasts refer to weather.gov/desmoines/water. &&
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