EF1 tornado in St. Clair County, Illinois

A tornado touched down at 7:03 PM CDT just south of the intersection of N 2nd Street and West F Street and tracked to the northeast. It initially caused minor tree and power line damage. Then as it moved through moved through the Forest Hill Drive area, it briefly intensified either snapping off or uprooting several very large trees. Several of the trees fell onto homes, causing more significant structural damage. Further to the northeast there was minor structural damage to a couple of homes, apartment buildings and businesses. Then the tornado lifted and dissipated on Adeline Drive just west of Sierra Drive at 7:07 PM CDT. The tornado was rated EF1 with a max wind speed of 98 mph. The path length was 3.04 miles and a max path width of 200 yards. No deaths or injuries were reported.

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.