Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 113, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 20, 2021, 11:26 AM CDT for 4 parishes in Louisiana. It was in force for 94 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
- May 20, 2021, 11:26 AM CDT (16:26 UTC)
- Expired
- May 20, 2021, 1:00 PM CDT
- In force
- 94 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties East Baton Rouge Parish, LA, East Feliciana Parish, LA, Livingston Parish, LA, Saint Helena Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 4.4 hours before the alert went out and 114 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
- 622 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 599 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
800 WUUS54 KLIX 201626 SVRLIX LAC033-037-063-091-201800- /O.NEW.KLIX.SV.W.0113.210520T1626Z-210520T1800Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service New Orleans LA 1126 AM CDT Thu May 20 2021 The National Weather Service in New Orleans has issued a * Severe Thunderstorm Warning for... St. Helena Parish in southeastern Louisiana... Northwestern Livingston Parish in southeastern Louisiana... Eastern East Feliciana Parish in southeastern Louisiana... Northeastern East Baton Rouge Parish in southeastern Louisiana... * Until 100 PM CDT. * At 1126 AM CDT, a severe thunderstorm was located near Livingston, or 10 miles northeast of Denham Springs, moving north at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Denham Springs, Clinton, Greensburg, Walker, Livingston, Montpelier, Pride, Felps, Watson, Darlington and Easleyville. 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 3048 9066 3048 9095 3100 9103 3100 9057 TIME...MOT...LOC 1626Z 177DEG 22KT 3055 9080 HAIL...<.75IN WIND...60MPH $$ CAB
2 follow-up statements
474
WWUS54 KLIX 201657
SVSLIX
Severe Weather Statement
National Weather Service New Orleans LA
1157 AM CDT Thu May 20 2021
LAC033-063-201707-
/O.CAN.KLIX.SV.W.0113.000000T0000Z-210520T1800Z/
Livingston LA-East Baton Rouge LA-
1157 AM CDT Thu May 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN LIVINGSTON AND
NORTHEASTERN EAST BATON ROUGE PARISHES IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 3065 9063 3068 9083 3071 9084 3072 9085
3072 9099 3100 9103 3100 9057
TIME...MOT...LOC 1657Z 177DEG 22KT 3074 9081
$$
LAC037-091-201800-
/O.CON.KLIX.SV.W.0113.000000T0000Z-210520T1800Z/
St. Helena LA-East Feliciana LA-
1157 AM CDT Thu May 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR ST. HELENA AND EASTERN EAST FELICIANA PARISHES...
At 1157 AM CDT, a severe thunderstorm was located 9 miles south of
Darlington, or 10 miles southwest of Greensburg, moving north at 25
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Clinton, Greensburg, Montpelier, Felps, Darlington and Easleyville.
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 3065 9063 3068 9083 3071 9084 3072 9085
3072 9099 3100 9103 3100 9057
TIME...MOT...LOC 1657Z 177DEG 22KT 3074 9081
HAIL...<.75IN
WIND...60MPH
$$
CAB254 WWUS54 KLIX 201740 SVSLIX Severe Weather Statement National Weather Service New Orleans LA 1240 PM CDT Thu May 20 2021 LAC037-091-201800- /O.CON.KLIX.SV.W.0113.000000T0000Z-210520T1800Z/ St. Helena LA-East Feliciana LA- 1240 PM CDT Thu May 20 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR NORTHERN ST. HELENA AND NORTHEASTERN EAST FELICIANA PARISHES... At 1240 PM CDT, a severe thunderstorm was located near Gillsberg, or 11 miles south of Liberty, moving north at 25 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Greensburg, Felps, Darlington and Easleyville. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Torrential rainfall is occurring with this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 3081 9060 3088 9097 3099 9102 3099 9057 TIME...MOT...LOC 1740Z 184DEG 23KT 3101 9074 HAIL...<.75IN WIND...60MPH $$ CAB
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:03 PM CDT | Special Weather Statement | LIX | Saint Tammany | 42 min |
| May 19, 7:24 PM CDT | Special Marine Warning | LIX | 81 min | |
| May 19, 8:00 PM CDT | Severe Thunderstorm Warning | LIX | Saint Charles, Saint John the Baptist | 25 min |
| May 19, 8:30 PM CDT | Special Marine Warning | LIX | 30 min | |
| May 19, 9:19 PM CDT | Areal Flood Advisory | LIX | Ascension, East Baton Rouge, Iberville, Livingston | 116 min |
| May 20, 3:42 AM CDT | Special Weather Statement | LIX | Ascension, Assumption, Iberville, Jefferson, Plaquemines, Saint Charles and 3 more | 63 min |
| May 20, 4:05 AM CDT | Special Marine Warning | LIX | 55 min | |
| May 20, 4:18 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 5:03 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 5:33 AM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 7:00 AM CDT | Special Weather Statement | LIX | Assumption, Jefferson, Lafourche, Saint Charles, Saint James | 60 min |
| May 20, 7:39 AM CDT | Tornado Warning | LIX | Jefferson | 8 min |
| May 20, 7:42 AM CDT | Special Marine Warning | LIX | 33 min | |
| May 20, 8:27 AM CDT | Special Marine Warning | LIX | 63 min | |
| May 20, 8:37 AM CDT | Areal Flood Advisory | LIX | Ascension, Assumption, East Baton Rouge, Iberville, Lafourche, Livingston and 3 more | 52 min |
| May 20, 8:58 AM CDT | Tornado Warning | LIX | East Feliciana | 13 min |
| May 20, 9:29 AM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, West Baton Rouge | 9 hr |
| May 20, 9:45 AM CDT | Flash Flood Warning | LIX | East Baton Rouge, East Feliciana, Saint Helena, West Feliciana | 11 hr |
| May 20, 10:04 AM CDT | Flash Flood Warning | LIX | Ascension, Assumption, Iberville, Lafourche, Livingston, Saint James and 1 more | 13 hr |
| May 20, 10:52 AM CDT | Severe Thunderstorm Warning | LIX | Saint Charles, Saint John the Baptist | 19 min |
| May 20, 11:22 AM CDT | Special Marine Warning | LIX | 38 min | |
| May 20, 2:16 PM CDT | River Flood Warning | LIX | East Baton Rouge, Livingston | 68 hr |
| May 20, 2:22 PM CDT | River Flood Warning | LIX | Ascension, Livingston | 4 days |
| May 20, 2:33 PM CDT | Special Marine Warning | LIX | 57 min | |
| May 20, 2:40 PM CDT | River Flood Warning | LIX | East Baton Rouge | 61 hr |
| May 20, 3:29 PM CDT | Special Marine Warning | LIX | 61 min | |
| May 20, 3:56 PM CDT | Gale Warning | LIX | 19 hr | |
| May 20, 3:56 PM CDT | Small Craft Advisory | LIX | 60 hr | |
| May 20, 3:56 PM CDT | Wind Advisory | LIX | Orleans, Saint Bernard, Saint John the Baptist, Saint Tammany | 27 hr |
| May 20, 4:30 PM CDT | Special Marine Warning | LIX | 90 min | |
| May 20, 4:58 PM CDT | Special Weather Statement | LIX | Lafourche, Terrebonne | 47 min |
| May 20, 5:16 PM CDT | Areal Flood Advisory | LIX | Assumption, Jefferson, Lafourche, Terrebonne | 3 hr |
| May 20, 6:42 PM CDT | Flash Flood Warning | LIX | Ascension, East Baton Rouge, Iberville, Livingston, Saint Helena, West Baton Rouge | 4 hr |
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; the sounding from the Mesonet's radiosonde archive.