Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 88, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 29, 2021, 5:01 PM CDT for Plaquemines Parish, Louisiana. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 29, 2021, 5:01 PM CDT (22:01 UTC)
- Expired
- Aug 29, 2021, 11:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Damage threat
- Catastrophic
- Flood severity
- None
County Plaquemines Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.0 hours before the alert went out and 55 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
- 3256 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 85 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted.
635
WGUS54 KLIX 292201
FFWLIX
LAC075-300400-
/O.NEW.KLIX.FF.W.0088.210829T2201Z-210830T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
501 PM CDT Sun Aug 29 2021
...FLASH FLOOD EMERGENCY FOR BRAITHWAITE AREA...
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Northwestern Plaquemines Parish in southeastern Louisiana...
* Until 1100 PM CDT.
* At 501 PM CDT, emergency management reported back levee
over-topping on the eastbank of Plaquemines Parish between the
parish line and White Ditch.
This is a FLASH FLOOD EMERGENCY for Braithwaite area. This is a
PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!
HAZARD...Life threatening flash flooding.
SOURCE...Emergency management reported.
IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
HIGHER GROUND NOW! Life threatening flash flooding
throughout the warned area is possible.
* Some locations that will experience flash flooding include...
Braithwaite
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to higher ground now! This is an extremely dangerous and
life-threatening situation. Do not attempt to travel unless you are
fleeing an area subject to flooding or under an evacuation order.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2986 8991 2984 8990 2982 8993 2981 8993
2980 8995 2978 8996 2977 8998 2976 8999
2976 9001 2977 9001 2978 9001 2980 9000
2981 9000 2982 8999 2983 8998 2985 8997
2986 8997 2987 8996 2988 8996
FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CATASTROPHIC
$$
TD1 follow-up statement
213
WGUS74 KLIX 300409
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
1109 PM CDT Sun Aug 29 2021
LAC075-300419-
/O.EXP.KLIX.FF.W.0088.000000T0000Z-210830T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Plaquemines LA-
1109 PM CDT Sun Aug 29 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR NORTHWESTERN PLAQUEMINES
PARISH...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 700 AM CDT Tuesday for
portions of southeast Louisiana and Mississippi.
LAT...LON 2986 8991 2984 8990 2982 8993 2981 8993
2980 8995 2978 8996 2977 8998 2976 8999
2976 9001 2977 9001 2978 9001 2980 9000
2981 9000 2982 8999 2983 8998 2985 8997
2986 8997 2987 8996 2988 8996
$$
CABThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 6:23 AM CDT | Special Marine Warning | LIX | 22 min | |
| Aug 29, 7:49 AM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles, Terrebonne | 3 hr |
| Aug 29, 10:30 AM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Plaquemines, Saint Bernard, Saint Charles, Terrebonne | 3 hr |
| Aug 29, 1:26 PM CDT | Extreme Wind Warning | LIX | Assumption, Jefferson, Lafourche, Plaquemines, Saint Charles, Saint James and 2 more | 3 hr |
| Aug 29, 2:42 PM CDT | Special Marine Warning | LIX | 18 min | |
| Aug 29, 3:39 PM CDT | Flash Flood Warning | LIX | Lafourche, Terrebonne | 7 hr |
| Aug 29, 4:08 PM CDT | Flash Flood Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles, Saint John the Baptist | 8 hr |
| Aug 29, 4:23 PM CDT | Extreme Wind Warning | LIX | Jefferson, Lafourche, Saint Charles, Saint James, Saint John the Baptist, Terrebonne | 2 hr |
| Aug 29, 5:04 PM CDT | Special Marine Warning | LIX | 26 min | |
| Aug 29, 6:04 PM CDT | Special Marine Warning | LIX | 26 min | |
| Aug 29, 6:09 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 8 hr |
| Aug 29, 6:21 PM CDT | Flash Flood Warning | LIX | Saint Tammany | 16 hr |
| Aug 29, 6:25 PM CDT | Tornado Warning | LIX | Orleans, Saint Bernard, Saint Tammany | 35 min |
| Aug 29, 6:33 PM CDT | Special Marine Warning | LIX | 57 min | |
| Aug 29, 6:54 PM CDT | Tornado Warning | LIX | Saint Tammany | 36 min |
Nearby
Flash Flood Warnings in Louisiana, 2021Every flash flood warning in 2021
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.