Alert archive / Louisiana / Flash Flood Warnings in 2024
Flash Flood Warning 71, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Jul 26, 2024, 5:39 PM CDT for Jefferson Parish, Orleans Parish, Louisiana. It was in force for 96 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
- Jul 26, 2024, 5:39 PM CDT (22:39 UTC)
- Expired
- Jul 26, 2024, 7:15 PM CDT
- In force
- 96 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jefferson Parish, LA, Orleans Parish, LA
The radar
The Hammond radar (KHDC), 81 km from the middle of the area, began a volume at 22:38 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, 10.7 hours before the alert went out and 272 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
- 117 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 1018 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 113 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 |
|---|---|---|---|---|
| Jul 26, 12:38 PM CDT | Special Weather Statement | LIX | Saint Helena | 37 min |
| Jul 26, 1:46 PM CDT | Areal Flood Advisory | LIX | East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, West Baton Rouge | 3 hr |
| Jul 26, 2:14 PM CDT | Special Marine Warning | LIX | 61 min | |
| Jul 26, 2:33 PM CDT | Special Weather Statement | LIX | Saint John the Baptist | 27 min |
| Jul 26, 4:22 PM CDT | Areal Flood Advisory | LIX | Lafourche, Terrebonne | 113 min |
| Jul 26, 5:17 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Saint Bernard | 22 min |
| Jul 26, 6:47 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard | 88 min |
Nearby
Flash Flood Warnings in Louisiana, 2024Every flash flood warning in 2024
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.