Flash Flood — St. Bernard, Louisiana

2025-04-21 · near Arabi, St. Bernard, Louisiana

Event narrative

Mehle St flooded with 6 or more inches of water, with water reaching beyond the sidewalks.

Wider weather episode

On the afternoon of April 21st, a cold front approaching the region began to stall over central Louisiana as upper-level support and steering flow shifted northeastward. With the front losing its dynamical push, storms developed ahead of it across the New Orleans area and became slow-moving due to the lack of steering flow. These storms produced efficient, long-duration rainfall over the city, and the urban landscape of New Orleans quickly became overwhelmed. The result was widespread flash flooding across the metro area, which persisted until the rain finally tapered off near sunset.

View location on OpenStreetMap → (29.9594, -90.0039)

Source: NOAA Storm Events Database, event_id 1258229. Narrative written by the NWS forecast office that issued the report.