EF0 Tornado — Monroe, Illinois

2023-04-15 · near Harrisonville, Monroe, Illinois

Event narrative

A tornado touched down at 6:39 PM CDT just east of intersection of Harris Road and B Road and tracked to the east northeast. There was some minor roof damage to a couple of outbuildings before the tornado crossed Bluff Road, around 2.6 miles south southwest of Valmeyer. For the remainder of the tornado path the damage was mostly to trees. However, a house sustained minor roof damage on Deer Hill Road, about 2.4 miles southeast of Valmeyer. Then the tornado lifted and dissipated around 6:46 PM CDT. Overall the tornado was rated EF0 with a max wind speed of 85 mph. The tornado path length is 4.97 miles with a max path width of 100 yards. No deaths or injuries were reported.

Wider weather episode

Several strong to severe thunderstorms moved into eastern Missouri in the afternoon hours of April 15th. These storms were initially producing copious large hail, but rapidly transitioned into tornadic storms. The first tornado was associated with a supercell ahead of a congealing line of convection moving rapidly toward the Mississippi River. A portion of this line of storms rapidly surged eastward, resulting in numerous tornadoes in Jefferson county in Missouri, and Monroe, Madison, St. Clair, and Washington counties in Illinois. In total, 12 tornadoes have been identified, including 3 EF-1s, 6 EF-0s, and 3 tornadoes of unknown intensity that produced no damage.

View location on OpenStreetMap → (38.2760, -90.3290)

Source: NOAA Storm Events Database, event_id 1093834. Narrative written by the NWS forecast office that issued the report.