Iowa Severe Flash Flood Warning | Effective 09/06/2026 12:06
At 206 PM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 3 and 6 inches of rain have
fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Flash
flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar indicated. In addition, significant ponding of water
was reported on the north side of Graettinger in addition to
many areas with basement flooding.