Flash Flood — Jefferson, Louisiana

2025-07-30 · near Terrytown, Jefferson, Louisiana

Event narrative

A picture on social media showed water over the curb and entering a parking lot on Bannerwood Drive in Gretna.

Wider weather episode

A primed microburst environment was in place on July 30, 2025, as hot and humid conditions combined with a weak surface low pressure across southeast Louisiana and southern Mississippi. Numerous severe thunderstorms developed through the afternoon. In Marrero, Jefferson Parish, thunderstorm winds knocked down a powerline, while additional wind damage in Hammond brought down multiple trees, including one onto a powerline. In Centreville, MS, a downed tree damaged two homes. Heavy rainfall also led to flash flooding, with high water reported in Gretna, Baton Rouge, and Ascension Parish where parking lots were submerged and a vehicle partially underwater. Hail up to the size of quarters was observed in Baton Rouge.

View location on OpenStreetMap → (29.8800, -90.0300)

Source: NOAA Storm Events Database, event_id 1286891. Narrative written by the NWS forecast office that issued the report.