Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 84, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Aug 23, 2021, 7:13 PM CDT for Ascension Parish, East Baton Rouge Parish, Iberville Parish, Louisiana. It was in force for 57 min. 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 23, 2021, 7:13 PM CDT (00:13 UTC)
- Expired
- Aug 23, 2021, 8:10 PM CDT
- In force
- 57 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Ascension Parish, LA, East Baton Rouge Parish, LA, Iberville Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 0.2 hours before the alert went out and 128 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
- 999 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 1430 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- 6 m²/s²
- 0-3 km storm-relative helicity
- 19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
140
WGUS54 KLIX 240013
FFWLIX
LAC005-033-047-240315-
/O.NEW.KLIX.FF.W.0084.210824T0013Z-210824T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
713 PM CDT Mon Aug 23 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
Northwestern Ascension Parish in southeastern Louisiana...
Southeastern East Baton Rouge Parish in southeastern Louisiana...
Eastern Iberville Parish in southeastern Louisiana...
* Until 1015 PM CDT.
* At 713 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 4 inches of rain
have fallen. Additional rainfall amounts of 1 to 2 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
St. Gabriel, Prairieville, Old Jefferson and Village St. George.
This includes the following Interstates...
Interstate 10 in Louisiana between mile markers 166 and 173.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3033 9106 3034 9106 3035 9106 3036 9105
3037 9105 3037 9103 3037 9101 3037 9100
3036 9100 3036 9099 3033 9098 3030 9097
3027 9096 3026 9102 3025 9103 3028 9105
3029 9105 3030 9106
FLASH FLOOD...RADAR INDICATED
$$
TD1 follow-up statement
068
WGUS74 KLIX 240110
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
810 PM CDT Mon Aug 23 2021
LAC005-033-047-240120-
/O.CAN.KLIX.FF.W.0084.000000T0000Z-210824T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Ascension LA-East Baton Rouge LA-Iberville LA-
810 PM CDT Mon Aug 23 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN ASCENSION,
SOUTHEASTERN EAST BATON ROUGE AND EASTERN IBERVILLE PARISHES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 3033 9106 3034 9106 3035 9106 3036 9105
3037 9105 3037 9103 3037 9101 3037 9100
3036 9100 3036 9099 3033 9098 3030 9097
3027 9096 3026 9102 3025 9103 3028 9105
3029 9105 3030 9106
$$
TDThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 7:00 PM CDT | Special Weather Statement | LIX | Iberville | 30 min |
| Aug 23, 7:03 PM CDT | Special Weather Statement | LIX | Saint Charles | 27 min |
| Aug 23, 7:18 PM CDT | Special Marine Warning | LIX | 117 min | |
| Aug 23, 7:28 PM CDT | Special Weather Statement | LIX | Jefferson | 47 min |
| Aug 23, 8:37 PM CDT | Special Weather Statement | LIX | Lafourche | 38 min |
| Aug 23, 9:08 PM CDT | Special Marine Warning | LIX | 97 min | |
| Aug 23, 10:29 PM CDT | Special Marine Warning | LIX | 91 min | |
| Aug 23, 11:56 PM CDT | Special Marine Warning | LIX | 94 min | |
| Aug 24, 4:27 AM CDT | Special Weather Statement | LIX | Lafourche | 48 min |
| Aug 24, 2:49 PM CDT | Special Weather Statement | LIX | East Feliciana | 26 min |
| Aug 24, 3:19 PM CDT | Special Weather Statement | LIX | Iberville | 26 min |
| Aug 24, 3:26 PM CDT | Special Weather Statement | LIX | East Feliciana | 49 min |
| Aug 24, 3:27 PM CDT | Special Weather Statement | LIX | Terrebonne | 33 min |
| Aug 24, 3:41 PM CDT | Special Weather Statement | LIX | East Baton Rouge | 34 min |
| Aug 24, 4:05 PM CDT | Special Weather Statement | LIX | Pointe Coupee | 40 min |
| Aug 24, 4:07 PM CDT | Special Weather Statement | LIX | Iberville | 38 min |
| Aug 24, 4:07 PM CDT | Special Weather Statement | LIX | Terrebonne | 38 min |
| Aug 24, 4:18 PM CDT | Special Weather Statement | LIX | Iberville | 27 min |
| Aug 24, 4:31 PM CDT | Special Weather Statement | LIX | Assumption | 44 min |
| Aug 24, 4:51 PM CDT | Special Weather Statement | LIX | Lafourche | 39 min |
| Aug 24, 5:52 PM CDT | Special Marine Warning | LIX | 38 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.