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

2025-04-25 · near Mid Mid Lake Pontchartrain Causeway - Xptn Weatherflow, Lake Ponchartrain and Lake Maurepas, Gulf of Mexico

Event narrative

Pontchartrain Causeway XPTN observation recorded 42 mph gust.

Wider weather episode

On April 25th, southeast Louisiana experienced a typical airmass convective setup, but the presence of dry air aloft and steeper mid-level lapse rates increased the potential for damaging winds and severe hail. The strongest storms developed during the afternoon and impacted Livingston and Tangipahoa Parishes, producing pockets of thunderstorm wind damage and reports of severe hail. As the storms moved southeast, they crossed Lake Pontchartrain while still generating gusty winds before gradually weakening.

View location on OpenStreetMap → (30.2000, -90.1200)

Source: NOAA Storm Events Database, event_id 1258239. Narrative written by the NWS forecast office that issued the report.