EF1 Tornado — St. Tammany, Louisiana

2025-03-15 · near Houltonville, St. Tammany, Louisiana

Event narrative

A waterspout moved onshore near Madisonville causing damage to marsh grass south of Hwy 22 which is visible in high resolution satellite data. The first damage point observed on the in-person survey was on LA Hwy 22 where several branches were snapped just west of Fairview-Riverside State Park. The tornado moved northeastward through the Deloaks neighborhood causing numerous small to medium branches to fall from trees and downing one tree on Elmwood Loop. As the tornado continued northeastward it caused additional damage to trees, with several trees downed along Three Rivers Rd. The tornado appears to have lifted as it approached Hwy 190, but not before downing a large pine tree on Maple Ridge Way.

Wider weather episode

A potent weather system impacted the local area, producing a rare EF-4 tornado. Only a few tornadoes that strong have developed in the local forecast area. That tornado started its path in northern Tangipahoa Parish and continued on its 60+ mile long path. The environment needed for violent and long lived tornadoes, were in place right as a cold front approached from the west.

View location on OpenStreetMap → (30.3800, -90.1700)

Source: NOAA Storm Events Database, event_id 1250417. Narrative written by the NWS forecast office that issued the report.