Flash Flood — Terrebonne, Louisiana

2025-08-21 · near Southdown, Terrebonne, Louisiana

Event narrative

Museum Drive is impassable due to water covering the road.

Wider weather episode

The local area was on the eastern periphery of an upper level ridge. A weak frontal boundary was slowly sagging in from the northeast due to the presence of an upper level trough along the east coast of the United States. Strong daytime heating combined with ample moisture in place and weak surface boundary convergence created an environment conducive for heavy rainfall and a few severe thunderstorms.

View location on OpenStreetMap → (29.5900, -90.7400)

Source: NOAA Storm Events Database, event_id 1293004. Narrative written by the NWS forecast office that issued the report.