Flash Flood in Lawrence County, Illinois

Flash Flood July 1, 2025 · Lawrence County, Illinois

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Water was reported over IL Route 1 between St. Francisville and Mt. Carmel, beginning at 22:59 LST on June 30th. Other side streets were also inundated by water. This flooding lingered into the early morning hours of July 1st, dissipating by 01:45 LST.

The wider storm

A slow-moving cold front interacted with a very moist, unstable airmass during the afternoon and evening of June 30th, 2025, resulting in a cluster of thunderstorms that produced heavy rainfall along and south of I-70 late that evening. Rainfall amounts of 1 to 3.5 inches occurred, which resulted in a few instances of flooding beginning on June 30th and lingering into the early morning hours of July 1st.

Began near Sand Barrens (38.5800, -87.6900).

Source: NOAA Storm Events Database, event 1261552. Narratives are written by the National Weather Service forecast office that issued the report.

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