⚠️ Flash Flood Warning – Monona, IA; Thurston, NE – Thursday, August 13, 2026

Flash Flood Warning issued August 13 at 5:25AM CDT until August 13 at 8:30AM CDT by NWS Omaha/Valley NE

Details

FFWOAX

The National Weather Service in Omaha/Valley has issued a

* Flash Flood Warning for…
Northern Monona County in west central Iowa…
Thurston County in northeastern Nebraska…

* Until 830 AM CDT.

* At 525 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 5 inches of rain
have fallen, with much of it falling in less than an hour.
Additional rainfall amounts up to 1 inch are possible in the warned
area. Flash flooding is ongoing or expected to begin shortly.

HAZARD…Flash flooding caused by thunderstorms.

SOURCE…Radar indicated.

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…
Onawa, Mapleton, Walthill, Whiting, Ute, Rosalie, Castana,
Thurston, Macy, Rodney, Lewis And Clark State Park, Kennebec, Omaha
Reservation and Winnebago Reservation.

Instructions

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

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.