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EF1 tornado in Monroe County, Illinois

Tornado March 14, 2025 · Monroe County, Illinois

EF1

Rating

14.7 mi

Whole path

275 yd

Path width

$150K

Damage as recorded

NOAA records this tornado county by county. Its path ran through Monroe County → St. Clair County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 275 yards (0.16 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF1 means. On the Enhanced Fujita scale, EF1 is moderate damage: roofs badly stripped, mobile homes pushed off foundations or overturned, windows broken, consistent with estimated gusts of 86–110 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

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.

The wider storm

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.

Began near Valmeyer (38.2991, -90.3107).

Other tornadoes from the same storm system

5 more tornadoes the National Weather Service filed under this storm episode.

EF2 St. Charles County EF2 St. Clair County EF2 Perry County EF1 St. Clair County EF1 Fayette County

Source: NOAA Storm Events Database, event 1241475. Narratives are written by the National Weather Service forecast office that issued the report.

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