EF1 Tornado — Monroe, Illinois

2025-03-14 · near Valmeyer, Monroe, Illinois

Event narrative

At approximately 9:52 PM a tornado began southwest of Valmeyer, IL in Monroe County and continued northeast where it impacted the towns of Valmeyer and Waterloo. The worst damage was to residences and small businesses within these municipalities. From Waterloo the tornado moved into a rural area where it produced minor tree damage along the Monroe/St. Clair County border. In Monroe County the tornado was rated EF-1 with a path length of 12.3 miles and maximum path width of 275 yards.

Wider weather episode

During the late afternoon of March 14, 2025, numerous severe thunderstorms developed across central Missouri and tracked east. After sunset, these thunderstorms began producing tornadoes, some strong, across portions of Missouri and Illinois. In total, 13 tornadoes touched down in the CWA, making it one of the most active outbreaks on record for the St. Louis CWA. Six of these tornadoes occurred at least partially in St. Louis's Illinois counties.

View location on OpenStreetMap → (38.2991, -90.3107)

Source: NOAA Storm Events Database, event_id 1241475. Narrative written by the NWS forecast office that issued the report.