Alert archive / Louisiana / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 178, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Sep 21, 2026, 6:14 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 20 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
- Sep 21, 2026, 6:14 PM CDT (23:14 UTC)
- Expired
- Sep 21, 2026, 6:34 PM CDT
- In force
- 20 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Hail
- 0.0 in
- Wind
- 60.0 mph
County Saint Tammany Parish, LA
The radar
The Hammond radar (KHDC), 45 km from the middle of the area, began a volume at 23:15 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 12:00Z, 11.2 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
- 1035 J/kg
- Mixed-layer CIN
- -133 J/kg
- Mixed-layer LCL
- 1338 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 21, 12:33 PM CDT | Special Weather Statement | LIX | Saint Helena | 27 min |
| Sep 21, 2:22 PM CDT | Special Weather Statement | LIX | Terrebonne | 53 min |
| Sep 21, 3:01 PM CDT | Special Weather Statement | LIX | Orleans | 44 min |
| Sep 21, 3:12 PM CDT | Special Weather Statement | LIX | Assumption | 93 min |
| Sep 21, 3:49 PM CDT | Special Weather Statement | LIX | West Baton Rouge | 41 min |
| Sep 21, 4:12 PM CDT | Special Weather Statement | LIX | Washington | 48 min |
| Sep 21, 4:17 PM CDT | Special Weather Statement | LIX | Ascension | 43 min |
| Sep 21, 4:36 PM CDT | Special Weather Statement | LIX | Iberville, West Baton Rouge | 39 min |
| Sep 21, 4:46 PM CDT | Severe Thunderstorm Warning | LIX | Iberville, West Baton Rouge | 59 min |
| Sep 21, 5:06 PM CDT | Special Weather Statement | LIX | Washington | 24 min |
| Sep 21, 5:12 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 63 min |
| Sep 21, 5:20 PM CDT | Special Weather Statement | LIX | Assumption | 40 min |
| Sep 21, 5:22 PM CDT | Special Weather Statement | LIX | Washington | 53 min |
| Sep 21, 5:31 PM CDT | Severe Thunderstorm Warning | LIX | Assumption, Iberville | 49 min |
| Sep 21, 5:35 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 55 min |
| Sep 21, 5:38 PM CDT | Special Weather Statement | LIX | Saint Tammany | 52 min |
| Sep 21, 5:59 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 52 min |
| Sep 21, 6:23 PM CDT | Special Marine Warning | LIX | 37 min | |
| Sep 21, 6:28 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa | 24 min |
| Sep 21, 6:58 PM CDT | Special Marine Warning | LIX | 32 min | |
| Sep 20, 8:21 PM CDT | Special Weather Statement | LIX | Jackson | 39 min |
| Sep 20, 9:03 PM CDT | Special Weather Statement | LIX | Jackson | 42 min |
| Sep 20, 9:44 PM CDT | Special Weather Statement | LIX | Harrison | 46 min |
| Sep 21, 3:10 PM CDT | Special Weather Statement | LIX | Wilkinson | 35 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2026Every severe thunderstorm warning in 2026
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.