⚠️ Flash Flood Warning – Delaware, IA; Dubuque, IA; Jackson, IA; Jones, IA; Jo Daviess, IL – Sunday, September 20, 2026

Flash Flood Warning issued September 20 at 5:12AM CDT until September 20 at 11:15AM CDT by NWS Quad Cities IA IL

Details

FFWDVN

The National Weather Service in Quad Cities has issued a

* Flash Flood Warning for…
Northwestern Jackson County in east central Iowa…
Northern Jones County in east central Iowa…
Eastern Delaware County in northeastern Iowa…
Dubuque County in northeastern Iowa…
Western Jo Daviess County in northwestern Illinois…

* Until 1115 AM CDT Sunday.

* At 512 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 2.5 inches of rain
have fallen. Additional rainfall amounts of 0.5 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…
Dubuque, Asbury, Dyersville, Monticello, Bellevue, Cascade,
Epworth, East Dubuque, Farley, Peosta, Earlville, Hopkinton, New
Vienna, Colesburg, Worthington, Holy Cross, La Motte, Luxemburg and
Rickardsville.

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.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

Please report observed flooding to local emergency services or law
enforcement and request they pass this information to the National
Weather Service when you can do so safely.

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