Flash Flood Warning Issued for Southern Henry County, Illinois Through Early Wednesday

Alert Details

The National Weather Service in Quad Cities has issued a Flash Flood Warning for southern Henry County in northwestern Illinois. The warning was issued at 9:11 PM CDT on March 10 and remains in effect until 2:00 AM CDT on March 11, 2026.

Affected Areas

The warning specifically impacts southern Henry County. Locations expected to experience flash flooding include:

• Kewanee
• Cambridge
• Alpha
• Andover
• Lynn Center
• Bishop Hill
• Ulah
• Henry County Fairgrounds
• German Corner
• Ophiem
• Johnson-Sauk Trail State Park

This warning also includes Interstate 74 in Illinois between mile markers 22 and 31.

What You Should Do

Residents and motorists are urged to “Turn around, don’t drown” when encountering flooded roads. Most flood-related deaths occur in vehicles. Avoid driving through water-covered roadways and stay away from small creeks and streams that may rise rapidly.

Expected Conditions

At 9:11 PM CDT, Doppler radar indicated thunderstorms producing heavy rainfall at a rate of 1 to 2 inches per hour across the warned area. Flash flooding is currently ongoing or expected to begin shortly. Primary hazards include the flooding of small creeks and streams, urban areas, highways, streets, and underpasses, as well as other poor drainage and low-lying areas.

Timeline

The Flash Flood Warning was issued at 9:11 PM CDT on Tuesday, March 10, and is scheduled to expire at 2:00 AM CDT on Wednesday, March 11.