Alert archive / Louisiana / Flash Flood Warnings in 2025
Flash Flood Warning 49, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 29, 2025, 4:52 AM CDT for Saint Tammany Parish, Louisiana. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 29, 2025, 4:52 AM CDT (09:52 UTC)
- Expired
- Aug 29, 2025, 5:25 AM CDT
- In force
- 33 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
County Saint Tammany Parish, LA
The radar
The Hammond radar (KHDC), 45 km from the middle of the area, began a volume at 09:51 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 9.9 hours before the alert went out and 213 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 912 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 9:34 PM CDT | Areal Flood Advisory | LIX | Saint Tammany | 52 min |
| Aug 28, 10:26 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 64 min |
| Aug 28, 10:53 PM CDT | Areal Flood Advisory | LIX | Saint Tammany | 53 min |
| Aug 28, 11:07 PM CDT | Special Weather Statement | LIX | East Feliciana | 38 min |
| Aug 28, 11:28 PM CDT | Special Weather Statement | LIX | Saint Helena | 47 min |
| Aug 28, 11:58 PM CDT | Areal Flood Advisory | LIX | Saint Tammany | 3 hr |
| Aug 29, 2:48 AM CDT | Areal Flood Advisory | LIX | Saint Tammany | 3 hr |
| Aug 29, 4:23 AM CDT | Areal Flood Advisory | LIX | Saint Tammany | 69 min |
| Aug 29, 12:52 PM CDT | Areal Flood Advisory | LIX | East Baton Rouge, Livingston, West Baton Rouge | 113 min |
| Aug 28, 10:18 PM CDT | Special Weather Statement | LIX | Wilkinson | 42 min |
| Aug 28, 10:40 PM CDT | Severe Thunderstorm Warning | LIX | Wilkinson | 50 min |
| Aug 29, 12:18 AM CDT | Flash Flood Warning | LIX | Hancock | 3 hr |
Nearby
Flash Flood Warnings in Louisiana, 2025Every flash flood warning in 2025
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.