Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 17, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Mar 24, 2021, 4:41 AM CDT for Plaquemines Parish, Louisiana. It was in force for 19 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Mar 24, 2021, 4:41 AM CDT (09:41 UTC)
- Expired
- Mar 24, 2021, 5:00 AM CDT
- In force
- 19 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Plaquemines Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 24, 4:55 AM CDT | HAIL 0.7 | 2 Wnw Empire, LA | EMERGENCY MANAGEMENT REPORTED DIME SIZED HAIL AT EMPIRE AND PORT SULPHUR. TIME ESTIMATED BY RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 9.7 hours before the alert went out and 92 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
- 545 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- -54 m²/s²
- 0-3 km storm-relative helicity
- -336 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
248
WUUS54 KLIX 240941
SVRLIX
LAC075-241015-
/O.NEW.KLIX.SV.W.0017.210324T0941Z-210324T1015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
441 AM CDT Wed Mar 24 2021
The National Weather Service in New Orleans has issued a
* Severe Thunderstorm Warning for...
West central Plaquemines Parish in southeastern Louisiana...
* Until 515 AM CDT.
* At 441 AM CDT, a severe thunderstorm was located 7 miles south of
Port Sulphur, moving northeast at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Port Sulphur and Empire.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2936 8980 2941 8978 2939 8981 2943 8981
2943 8985 2955 8969 2949 8963 2949 8959
2948 8960 2947 8958 2945 8952 2944 8954
2944 8957 2942 8953 2941 8957 2939 8956
2931 8968 2930 8976
TIME...MOT...LOC 0941Z 228DEG 46KT 2940 8973
HAIL...<.75IN
WIND...60MPH
$$2 follow-up statements
315
WWUS54 KLIX 240953
SVSLIX
Severe Weather Statement
National Weather Service New Orleans LA
453 AM CDT Wed Mar 24 2021
LAC075-241015-
/O.CON.KLIX.SV.W.0017.000000T0000Z-210324T1015Z/
Plaquemines LA-
453 AM CDT Wed Mar 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR CENTRAL PLAQUEMINES PARISH...
At 453 AM CDT, a severe thunderstorm was located over Empire, or 9
miles southeast of Port Sulphur, moving northeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Port Sulphur and Empire.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 2946 8954 2945 8955 2945 8956 2944 8957
2944 8956 2943 8955 2942 8958 2940 8957
2935 8964 2940 8968 2946 8971 2951 8966
2949 8963 2948 8960 2947 8958
TIME...MOT...LOC 0953Z 237DEG 41KT 2943 8959
HAIL...<.75IN
WIND...60MPH
$$268
WWUS54 KLIX 241000
SVSLIX
Severe Weather Statement
National Weather Service New Orleans LA
500 AM CDT Wed Mar 24 2021
LAC075-241010-
/O.CAN.KLIX.SV.W.0017.000000T0000Z-210324T1015Z/
Plaquemines LA-
500 AM CDT Wed Mar 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PLAQUEMINES PARISH IS
CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
New Orleans.
LAT...LON 2946 8954 2945 8955 2945 8956 2944 8957
2944 8956 2943 8955 2942 8958 2940 8957
2935 8964 2940 8968 2946 8971 2951 8966
2949 8963 2948 8960 2947 8958
TIME...MOT...LOC 0959Z 228DEG 46KT 2949 8951
$$The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 23, 7:35 PM CDT | Areal Flood Advisory | LIX | Jefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles | 5 hr |
| Mar 23, 9:26 PM CDT | Special Marine Warning | LIX | 64 min | |
| Mar 24, 12:39 AM CDT | Special Marine Warning | LIX | 2 hr | |
| Mar 24, 12:44 AM CDT | Special Marine Warning | LIX | 16 min | |
| Mar 24, 2:10 AM CDT | Special Weather Statement | LIX | Jefferson | 65 min |
| Mar 24, 2:16 AM CDT | Severe Thunderstorm Warning | LIX | Jefferson | 14 min |
| Mar 24, 2:26 AM CDT | Special Weather Statement | LIX | Lafourche, Terrebonne | 64 min |
| Mar 24, 2:40 AM CDT | Special Weather Statement | LIX | Plaquemines | 65 min |
| Mar 24, 2:51 AM CDT | Special Marine Warning | LIX | 114 min | |
| Mar 24, 3:04 AM CDT | Flash Flood Warning | LIX | Terrebonne | 3 hr |
| Mar 24, 3:59 AM CDT | Special Weather Statement | LIX | Jefferson | 61 min |
| Mar 24, 4:14 AM CDT | Areal Flood Advisory | LIX | Saint Tammany, Washington | 3 hr |
| Mar 24, 4:25 AM CDT | Special Marine Warning | LIX | 35 min | |
| Mar 24, 4:36 AM CDT | Special Weather Statement | LIX | Plaquemines | 39 min |
| Mar 24, 4:59 AM CDT | Special Marine Warning | LIX | 2 hr | |
| Mar 24, 2:47 PM CDT | Wind Advisory | LIX | Assumption, East Baton Rouge, East Feliciana, Iberville, Pointe Coupee, Saint Bernard and 7 more | 25 hr |
| Mar 24, 3:43 PM CDT | Special Weather Statement | LIX | West Feliciana | 32 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.