Flood — Hamilton, Illinois

2025-07-19 · near Dale, Hamilton, Illinois

Event narrative

Heavy rainfall led to three to four inches of water covering Hwy 142 near Digby Rd. Hourly rainfall totals were estimated by radar to be around an inch, with flooding severity limited due to there being very limited additional rainfall earlier or later.

Wider weather episode

As high pressure slowly crept northward towards the Quad State region, ridging remained over the middle Mississippi River Valley. A slow-moving MCS moved through the northeastern half of the Quad State midday to near sunset. CAPE rose to 1000-2000J/kg in northern portions of Southern Illinois with effective bulk shear around 30kts. Extremely high moisture content with precipitable water values of 2.25in resulted in torrential rainfall rates along and near the I-64 corridor. Several areas reported flash flooding, especially northern Wayne County which had radar estimated totals of up to half a foot in northwestern portions of the county and sandbags deployed in Cisne. Flash flooding was also reported in Hamilton, Franklin, and Williamson counties. Albion reported 3.12in of rainfall within four hours.

View location on OpenStreetMap → (38.0008, -88.4961)

Source: NOAA Storm Events Database, event_id 1305167. Narrative written by the NWS forecast office that issued the report.