Alert archive / Louisiana / Flash Flood Warnings in 2021
Flash Flood Warning 11, NWS New Orleans, LA
NWS New Orleans, LA issued this flash flood warning at Apr 10, 2021, 5:24 AM CDT for Saint Bernard Parish, Louisiana. It was in force for 3 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
- Apr 10, 2021, 5:24 AM CDT (10:24 UTC)
- Expired
- Apr 10, 2021, 8:16 AM CDT
- In force
- 3 hr
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Flood severity
- None
County Saint Bernard Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 10.4 hours before the alert went out and 37 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
- 2977 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 243 m²/s²
- 0-3 km storm-relative helicity
- 269 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 18.1
The text
As transmitted.
211
WGUS54 KLIX 101024
FFWLIX
LAC087-101330-
/O.NEW.KLIX.FF.W.0011.210410T1024Z-210410T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New Orleans LA
524 AM CDT Sat Apr 10 2021
The National Weather Service in New Orleans has issued a
* Flash Flood Warning for...
West Central St. Bernard Parish in southeastern Louisiana...
* Until 830 AM CDT.
* At 524 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 1.5 inches of
rain have fallen. Flash flooding is ongoing or expected to begin
shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
New Orleans, Chalmette, Meraux, Violet, Poydras and Arabi.
Additional rainfall amounts of 2 to 4 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 2999 8985 2994 8984 2993 8982 2994 8975
2996 8973 2995 8971 2993 8975 2992 8976
2990 8974 2987 8991 2990 8993 2991 8996
2995 9001 2999 8999 2998 8994 3000 8991
3000 8988 2999 8988
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...2-3 INCHES IN 1 HOUR
$$
TE1 follow-up statement
026
WGUS74 KLIX 101316
FFSLIX
Flash Flood Statement
National Weather Service New Orleans LA
816 AM CDT Sat Apr 10 2021
LAC087-101326-
/O.CAN.KLIX.FF.W.0011.000000T0000Z-210410T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
St. Bernard LA-
816 AM CDT Sat Apr 10 2021
...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL ST. BERNARD
PARISH...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 2999 8985 2994 8984 2993 8982 2994 8975
2996 8973 2995 8971 2993 8975 2992 8976
2990 8974 2987 8991 2990 8993 2991 8996
2995 9001 2999 8999 2998 8994 3000 8991
3000 8988 2999 8988
$$
MWThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 12:41 AM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 11 min |
| Apr 10, 1:07 AM CDT | Special Marine Warning | LIX | 22 min | |
| Apr 10, 1:40 AM CDT | Special Marine Warning | LIX | 20 min | |
| Apr 10, 1:45 AM CDT | Tornado Warning | LIX | Pointe Coupee, West Feliciana | 45 min |
| Apr 10, 1:52 AM CDT | Special Weather Statement | LIX | Saint Tammany | 38 min |
| Apr 10, 2:01 AM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Washington | 29 min |
| Apr 10, 2:05 AM CDT | Tornado Warning | LIX | Saint Tammany | 10 min |
| Apr 10, 2:28 AM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 47 min |
| Apr 10, 2:48 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Saint Helena, West Feliciana | 39 min |
| Apr 10, 2:58 AM CDT | Severe Thunderstorm Warning | LIX | Saint Helena, Tangipahoa | 35 min |
| Apr 10, 3:20 AM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge, East Feliciana, Pointe Coupee, West Baton Rouge, West Feliciana | 33 min |
| Apr 10, 3:25 AM CDT | Special Weather Statement | LIX | Saint Helena, Tangipahoa | 65 min |
| Apr 10, 3:26 AM CDT | Special Weather Statement | LIX | Ascension, Assumption, Livingston, Saint James, Saint John the Baptist | 64 min |
| Apr 10, 3:38 AM CDT | Special Marine Warning | LIX | 67 min | |
| Apr 10, 3:59 AM CDT | Special Weather Statement | LIX | East Baton Rouge | 46 min |
| Apr 10, 4:16 AM CDT | Special Marine Warning | LIX | 59 min | |
| Apr 10, 4:23 AM CDT | Tornado Warning | LIX | Saint James, Saint John the Baptist | 19 min |
| Apr 10, 4:40 AM CDT | Flash Flood Warning | LIX | Saint Tammany, Tangipahoa, Washington | 3 hr |
| Apr 10, 4:47 AM CDT | Special Weather Statement | LIX | Ascension, Assumption, Orleans, Saint Charles, Saint James, Saint John the Baptist and 1 more | 58 min |
| Apr 10, 4:58 AM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles, Saint Tammany | 47 min |
| Apr 10, 5:16 AM CDT | Flash Flood Warning | LIX | Orleans | 3 hr |
| Apr 10, 5:23 AM CDT | Special Marine Warning | LIX | 67 min | |
| Apr 10, 5:46 AM CDT | Special Weather Statement | LIX | Assumption, Jefferson, Orleans, Saint Charles | 59 min |
| Apr 10, 6:07 AM CDT | Areal Flood Advisory | LIX | Jefferson, Lafourche, Orleans, Saint Charles, Saint John the Baptist, Terrebonne | 2 hr |
| Apr 10, 6:24 AM CDT | Special Marine Warning | LIX | 96 min | |
| Apr 10, 6:29 AM CDT | Flash Flood Warning | LIX | Lafourche, Terrebonne | 89 min |
| Apr 10, 6:33 AM CDT | Flash Flood Warning | LIX | Jefferson, Plaquemines | 105 min |
| Apr 10, 6:42 AM CDT | Special Weather Statement | LIX | Jefferson, Lafourche, Plaquemines, Terrebonne | 78 min |
| Apr 10, 7:13 AM CDT | Special Marine Warning | LIX | 92 min | |
| Apr 10, 7:53 AM CDT | Special Marine Warning | LIX | 97 min | |
| Apr 10, 8:52 AM CDT | River Flood Warning | LIX | Saint Tammany | 10 days |
| Apr 10, 8:52 AM CDT | River Flood Warning | LIX | Saint Tammany | 24 hr |
| Apr 10, 8:55 AM CDT | River Flood Warning | LIX | Saint Tammany | 25 hr |
| Apr 10, 9:49 AM CDT | River Flood Warning | LIX | Washington | 33 hr |
| Apr 10, 11:15 AM CDT | Special Weather Statement | LIX | Terrebonne | 30 min |
| Apr 10, 11:51 AM CDT | Special Weather Statement | LIX | Lafourche | 39 min |
| Apr 10, 12:28 PM CDT | Special Weather Statement | LIX | Jefferson | 32 min |
| Apr 10, 5:46 PM CDT | River Flood Warning | LIX | Saint Helena | 26 hr |
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.