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Marine Thunderstorm Wind · Gulf of Mexico

Marine Thunderstorm Wind April 21, 2025 · Lake Ponchartrain and Lake Maurepas, Gulf of Mexico

46 mph

Measured gust (40 kt)

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

A Weatherflow Tempest weather station along Rue Chardonnay in Kenner measured a thunderstorm wind gust of 46 mph or 40 knots.

The wider storm

On the afternoon of April 21st, a cold front approaching the region began to stall over central Louisiana as upper-level support and steering flow shifted northeastward. With the front losing its dynamical push, storms developed ahead of it across the New Orleans area and became slow-moving due to the lack of steering flow. As these storms moved across Lake Pontchartrain, they produced periods of gusty thunderstorm winds over the lake. The activity gradually weakened and dissipated near sunset as instability decreased.

Began near Municipal Yacht Harbor - Weatherstem (30.0500, -90.2400).

Source: NOAA Storm Events Database, event 1258237. Narratives are written by the National Weather Service forecast office that issued the report.

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