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

2021-04-13 · near South Timbalier Station (spll1), Coastal Waters From Port Fourchon Louisiana To Lower Atchafalaya River Louisiana Out 20 Nm, Gulf of Mexico

Event narrative

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.

Wider weather episode

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.

View location on OpenStreetMap → (28.9908, -90.1940)

Source: NOAA Storm Events Database, event_id 995901. Narrative written by the NWS forecast office that issued the report.