EF2 tornado in St. Clair County, Alabama

National Weather Service meteorologists surveyed damage in northern St. Clair County and determined that the damage was consistent with an EF2 tornado, with maximum sustained winds near 115 mph. The tornado touched down just northeast of Ashville along Highway 411. The tornado continued east northeast and uprooted and snapped numerous pine trees. The tornado intensified as it approached the Etowah County line where structural damage became evident. One house was moved off its foundation with a complete loss of roofing materials. Stands of trees were snapped off near their bases, including both hardwoods and softwoods. The tornado then crossed Neely Henry Lake and into Etowah County.

Six tornadoes and hail up to 3 inches in diameter affected the northern areas of Central Alabama on the afternoon and evening hours of March 19th, with a rare PDS (Particularly Dangerous Situation) Tornado Watch issued for a large portion of Central Alabama. An environment favorable for significant severe thunderstorms developed as a low-amplitude upper-level trough moved into the region with a deepening surface low passing across far north Alabama. These two features resulted in a deep column of strong wind shear with 0-6km Bulk Shear values of 60-70 knots. Additionally, moist southerly flow, warm surface temperatures, and colder temperatures aloft yielded a moderately unstable air mass. Initially, thunderstorms were producing large to very large hail. However, the tornado threat increased in the late afternoon and evening hours as wind speeds at low levels increased with the arrival of a low-level jet.