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Marine Thunderstorm Wind · Gulf of Mexico

Marine Thunderstorm Wind April 13, 2021 · Coastal Waters From Port Fourchon Louisiana To Lower Atchafalaya River Louisiana Out 20 Nm, Gulf of Mexico

75 mph

Measured gust (65 kt)

Deaths

$50.0M

Damage as recorded

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

What the National Weather Service wrote

Seacor Power lift boat capsized when the bow echo moved off the southeast Louisiana coast during the mid afternoon. 13 of 19 crew members onboard perished (7 of those are lost and presumed dead). Convective wind gusts to 75 mph were observed. Conditions from the wake low winds hampered recovery efforts to Seacor Power.

The wider storm

A wake low developed on the backside of a cluster of showers and thunderstorms racing south across southeast Louisiana. This drastically enhanced downdraft winds, producing long duration winds around tropical storm strength across the area with peak gusts as strong as a weak hurricane. 13 men perished when these winds capsized a power lift boat.

Began near South Timbalier Station (spll1) (28.9908, -90.1940).

Source: NOAA Storm Events Database, event 995901. Narratives are written by the National Weather Service forecast office that issued the report.

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