Marine Thunderstorm Wind — Lake Ponchartrain and Lake Maurepas, Gulf of Mexico

2025-04-06 · near Mandeville Lakefront - Xmvl Weatherflow, Lake Ponchartrain and Lake Maurepas, Gulf of Mexico

Event narrative

The Weatherflow mesonet at Lakefront Mandeville XMVL measured a thunderstorm wind gust of 39 mph or 34 knots.

Wider weather episode

On the afternoon and evening of April 6th, a cold front tied to a low pressure system over the Tennessee Valley swept through the region, triggering a broken quasi-linear convective system (QLCS) in an environment of unstable air and modest wind shear. As the line moved across southeast Louisiana, strong thunderstorm winds gusted over Lake Pontchartrain before exiting the Lake and reaching its peak intensity along the Mississippi coast.

View location on OpenStreetMap → (30.3600, -90.0900)

Source: NOAA Storm Events Database, event_id 1258232. Narrative written by the NWS forecast office that issued the report.