⚠️ Flood Watch – Benton; Iowa; Johnson; Washington; Louisa; Mercer – Saturday, September 19, 2026

Flood Watch issued September 19 at 11:22AM CDT until September 20 at 7:00AM CDT by NWS Quad Cities IA IL

Details

* WHAT…Flooding and flash flooding caused by excessive rainfall are
possible.

* WHERE…Portions of northwest Illinois, including the following
county, Mercer and Iowa, including the following counties, Benton,
Iowa, Johnson, Louisa and Washington.

* WHEN…Through Sunday morning.

* IMPACTS…Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS…
– Widespread showers and storms are expected to develop late
tonight and last into Saturday. These storms will be capable of
rainfall rates between 1 to 2 inches per hour. Rainfall totals of
1 to 3 inches are likely in the hardest hit areas through
Saturday evening with the potential for localized areas of 3+
inches.

Instructions

You should monitor later forecasts and be alert for possible Flash
Flood Warnings. Those living in areas prone to flooding should be
prepared to take action should flooding develop.

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