Flash Flood — St. Bernard, Louisiana

2021-09-28 · near Versailles, St. Bernard, Louisiana

Event narrative

Veronica Drive in Chalmette was impassible due to high water.

Wider weather episode

Gulf moisture surging into the local area pushed precipitable water values to above the 90th percentile for this time of year. At the same time, an upper level trough was digging into Texas. Showers and thunderstorms began developing ahead of this feature. A weak wind field in place was a prime environment for a slow moving storm to produce flash flooding.

View location on OpenStreetMap → (29.9400, -89.9500)

Source: NOAA Storm Events Database, event_id 986770. Narrative written by the NWS forecast office that issued the report.