Alert archive / Iowa / River Flood Warnings in 2026
River Flood Warning 27, NWS Des Moines, IA
NWS Des Moines, IA issued this river flood warning at Sep 30, 2026, 8:36 PM CDT for Cass County, Iowa. It took effect at Oct 1, 2026, 6:08 AM CDT. It was in force for 21 hr.
The area
The counties it named.
The facts
- Issued
- Sep 30, 2026, 8:36 PM CDT (01:36 UTC)
- In effect from
- Oct 1, 2026, 6:08 AM CDT
- Expired
- Oct 2, 2026, 3:00 AM CDT
- In force
- 21 hr
- Issued by
- NWS Des Moines, IA
- Area
- Storm-based polygon
- Flood severity
- Minor
County Cass County, IA
The radar
The Des Moines radar (KDMX), 110 km from the middle of the area, began a volume at 01:38 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The river
Written for the forecast point East Nishnabotna River near Atlantic (ATCI4). The gauge peaked at 12.19 ft at Oct 1, 2026, 8:00 PM CDT.
- Action stage
- 15 ft
- Minor stage
- 19 ft
- Moderate stage
- 23 ft
- Major stage
- 24 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 06809210, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 8:36 PM CDT | River Flood Warning | DMX | Decatur | 54 hr |
| Sep 30, 8:52 PM CDT | River Flood Warning | DMX | Black Hawk | 67 hr |
| Sep 30, 10:22 PM CDT | River Flood Warning | DMX | Jasper, Marion, Polk | 3 days |
| Sep 30, 10:22 PM CDT | River Flood Warning | DMX | Warren | 21 hr |
| Sep 30, 10:22 PM CDT | River Flood Warning | DMX | Polk, Warren | 64 hr |
| Sep 30, 10:22 PM CDT | River Flood Warning | DMX | Marion, Polk, Warren | 4 days |
| Sep 30, 10:22 PM CDT | River Flood Warning | DMX | Dallas | 65 hr |
| Oct 1, 1:19 AM CDT | Flash Flood Warning | DMX | Audubon, Calhoun, Carroll, Crawford, Greene, Guthrie | 6 hr |
| Oct 1, 4:38 AM CDT | Flash Flood Warning | DMX | Black Hawk, Butler, Grundy, Tama | 6 hr |
Nearby
River Flood Warnings in Iowa, 2026Every river flood warning in 2026
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.