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Flash Flood — Jefferson, LA

May 9, 2025

Flood Cause
Heavy Rain

A surface low developed in the northwestern Gulf and tracking along the Louisiana coastline on May 9th. As moisture surged northward, training along the leading edge of an appendant warm front created a setup conducive for training of heavy rainfall. Flash flooding occurred across various portions of New Orleans Metro.

Source: NOAA National Weather Service Storm Events Database (event 1260578). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Jefferson, LA

This event is one of many recorded floods in Jefferson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Jefferson County flood data →

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