NWS Des Moines IAFF.W 0033October 1, 2026
Flash Flood Warning: Black Hawk, Butler, Grundy and 1 more, IA
The National Weather Service office in Des Moines issued a flash flood warning for Black Hawk, Butler, Grundy and 1 more in Iowa, in force until 10:45 a.m. local time on October 1. It was the 33rd flash flood warning the NWS office in Des Moines issued in 2026. Iowa had 4 flash flood warnings in October 2026, against 1 in an average October of 2008-2025 (Iowa's flash flood warnings by year).
Warning
In force for 6.1 hours
The notice
- Issued by
- National Weather Service, Des Moines IA
- Area
- Black Hawk, Butler, Grundy and 1 more
- State
- Iowa
- Level
- Warning
- Issued
- 4:38 a.m. CDT, October 1, 2026
- Expires
- 10:45 a.m. CDT, October 1, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- KDMX FF.W 0033
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
FFWDMX The National Weather Service in Des Moines has issued a * Flash Flood Warning for... Grundy County in central Iowa... Northern Tama County in central Iowa... Southeastern Butler County in north central Iowa... Black Hawk County in northeastern Iowa... * Until 1045 AM CDT Thursday. * At 438 AM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. 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... Waterloo, Cedar Falls, Grundy Center, Evansdale, Hudson, Reinbeck, Dike, Elk Run Heights, Uni-Dome And McLeod Center, Waterloo Municipal Airport, Crossroads Mall, Washburn, Dunkerton, Raymond, Wellsburg, New Hartford, Holland, Stout and Morrison. This includes Interstate 380 between mile markers 65 and 73.
What the agency told people to do
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. For the latest stream observations and forecasts refer to weather.gov/desmoines/water.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.