Flash Flood — Saline, Illinois

2025-07-18 · near Mitchellsville, Saline, Illinois

Event narrative

Approximately 8-10 of moving water was flowing across IL-145 south of Harrisburg. Radar estimated rainfall reached 1-2 in the area.

Wider weather episode

A surface boundary was positioned west to east across the Quad State during the early afternoon with convective activity increasing with daytime heating. Scattered convection primarily occurred south of the boundary mid to late afternoon. MLCAPE reached 2000J/kg but effective bulk shear was very limited. Precipitable water values over 2 allowed for torrential rainfall rates. Training storm occurrence was limited, leaving flash flooding south of Harrisburg as the one flood report out of Southern Illinois.

View location on OpenStreetMap → (37.6686, -88.5430)

Source: NOAA Storm Events Database, event_id 1304144. Narrative written by the NWS forecast office that issued the report.