⚠️ Flash Flood Warning – Cedar, IA; Iowa, IA; Johnson, IA; Keokuk, IA; Louisa, IA; Muscatine, IA; Washington, IA – Sunday, September 20, 2026

Flash Flood Warning issued September 20 at 12:16AM CDT until September 20 at 6:15AM CDT by NWS Quad Cities IA IL

Details

FFWDVN

The National Weather Service in Quad Cities has issued a

* Flash Flood Warning for…
Southern Cedar County in east central Iowa…
Iowa County in east central Iowa…
Johnson County in east central Iowa…
Muscatine County in east central Iowa…
Keokuk County in southeastern Iowa…
Northwestern Louisa County in southeastern Iowa…
Washington County in southeastern Iowa…

* Until 615 AM CDT.

* At 1216 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2 inches of rain
have fallen. Additional rainfall amounts of 2 to 3 inches 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…
Iowa City, Muscatine, Washington, Tipton, Marengo, West Branch,
Sigourney, Columbus Junction, Durant, Coralville, North Liberty,
West Liberty, Williamsburg, Wilton, Kalona, Tiffin, Wellman, Lone
Tree and University Heights.

This includes the following highways…
Interstate 80 in Iowa between mile markers 205 and 277. Interstate
380 between mile markers 1 and 7.

Instructions

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

Be aware of your surroundings and do not drive on flooded roads.

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