EF1 tornado in Tangipahoa Parish, Louisiana

Tornado March 11, 2026 · Tangipahoa Parish, Louisiana

EF1

Rating

21.1 mi

Whole path

200 yd

Path width

NOAA records this tornado county by county. Its path ran through St. Helena Parish → Tangipahoa Parish → St. Helena Parish → Tangipahoa Parish; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 200 yards (0.11 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

An EF-1 tornado entered Tangipahoa Parish from St Helena Parish a couple miles west of I-55 just north of LA 10. A few trees were snapped and uprooted by the tornado along the interstate before dissipating.

The wider storm

Environmental conditions favorable for a QLCS (Quasi-Linear Convective System) tornado event developed across southeast Louisiana and southern Mississippi during the afternoon and evening hours of March 11th. An upper-level storm system moving east from Texas overspread a very moist and increasingly unstable air mass in place across the region. At the same time, intense low-level wind shear and strong atmospheric spin developed as southerly winds strengthened ahead of an approaching line of storms with bowing segments.

The combination of rich Gulf moisture, strong low-level atmospheric spin, and a fast-moving line of thunderstorms created an environment supportive of embedded rotating circulations along the leading edge of the QLCS. As that line moved west to east across the local area, several rapidly developing tornadoes formed within these circulations. A total of 8 tornadoes were confirmed across southeast Louisiana, including 2 with path lengths exceeding 10 miles. Well over a dozen additional reports of damaging straight-line winds were also received.

Began near Fluker (30.8263, -90.5669).

Other tornadoes from the same storm system

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

EF1 Tangipahoa Parish EF1 Washington Parish EF0 Livingston Parish EF0 Tangipahoa Parish EF0 St. Tammany Parish EF0 St. Tammany Parish

Source: NOAA Storm Events Database, event 1323927. Narratives are written by the National Weather Service forecast office that issued the report.

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