Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 37, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Apr 10, 2021, 2:01 AM CDT for Pearl River County, Mississippi; Saint Tammany Parish, Washington Parish, Louisiana. It was in force for 29 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
- Apr 10, 2021, 2:01 AM CDT (07:01 UTC)
- Expired
- Apr 10, 2021, 2:30 AM CDT
- In force
- 29 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Saint Tammany Parish, LA, Washington Parish, LA, Pearl River County, MS
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 10, 12:16 AM CDT | Tornado Watch | SPC | 7 hr |
| Apr 9, 10:25 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 00:00Z, 7.0 hours before the alert went out and 40 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.
919
WUUS54 KLIX 100701
SVRLIX
LAC103-117-MSC109-100730-
/O.NEW.KLIX.SV.W.0037.210410T0701Z-210410T0730Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
201 AM CDT Sat Apr 10 2021
The National Weather Service in New Orleans has issued a
* Severe Thunderstorm Warning for...
North central St. Tammany Parish in southeastern Louisiana...
Southeastern Washington Parish in southeastern Louisiana...
Western Pearl River County in southern Mississippi...
* Until 230 AM CDT.
* At 201 AM CDT, a severe thunderstorm was located near Abita
Springs, or 9 miles northeast of Covington, moving northeast at 40
mph.
HAZARD...40 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Bogalusa, Abita Springs, Sun, Crossroads, Mcneil and Bush.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 AM CDT for southeastern
Louisiana...and southern Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3040 8995 3053 9006 3092 8973 3070 8947
TIME...MOT...LOC 0701Z 227DEG 34KT 3053 8997
HAIL...1.00IN
WIND...60MPH
$$
MEFFER2 follow-up statements
537
WWUS54 KLIX 100719
SVSLIX
Severe Weather Statement
National Weather Service New Orleans LA
219 AM CDT Sat Apr 10 2021
LAC117-100729-
/O.CAN.KLIX.SV.W.0037.000000T0000Z-210410T0730Z/
Washington LA-
219 AM CDT Sat Apr 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON PARISH
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 700 AM CDT for southeastern
Louisiana...and southern Mississippi.
LAT...LON 3047 8984 3057 8993 3084 8964 3070 8947
TIME...MOT...LOC 0719Z 237DEG 32KT 3061 8981
$$
LAC103-MSC109-100730-
/O.CON.KLIX.SV.W.0037.000000T0000Z-210410T0730Z/
St. Tammany LA-Pearl River MS-
219 AM CDT Sat Apr 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR NORTH CENTRAL ST. TAMMANY PARISH IN SOUTHEASTERN LOUISIANA AND
SOUTHWESTERN PEARL RIVER COUNTIES...
At 219 AM CDT, a severe thunderstorm was located near Bush, or 9
miles northwest of Picayune, moving northeast at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Mcneil.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 700 AM CDT for southeastern
Louisiana...and southern Mississippi.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3047 8984 3057 8993 3084 8964 3070 8947
TIME...MOT...LOC 0719Z 237DEG 32KT 3061 8981
HAIL...1.00IN
WIND...60MPH
$$
MEFFER014
WWUS54 KLIX 100729
SVSLIX
Severe Weather Statement
National Weather Service New Orleans LA
229 AM CDT Sat Apr 10 2021
LAC103-MSC109-100739-
/O.EXP.KLIX.SV.W.0037.000000T0000Z-210410T0730Z/
St. Tammany LA-Pearl River MS-
229 AM CDT Sat Apr 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL ST. TAMMANY
PARISH IN SOUTHEASTERN LOUISIANA AND SOUTHWESTERN PEARL RIVER
COUNTIES WILL EXPIRE AT 230 AM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
A Tornado Watch remains in effect until 700 AM CDT for southeastern
Louisiana...and southern Mississippi.
LAT...LON 3047 8984 3057 8993 3084 8964 3070 8947
TIME...MOT...LOC 0729Z 227DEG 34KT 3068 8973
$$
MEFFERThe office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 11:57 PM CDT | Severe Thunderstorm Warning | LIX | Amite, Pike | 36 min |
| Apr 10, 12:12 AM CDT | Severe Thunderstorm Warning | LIX | Walthall | 33 min |
| Apr 10, 12:14 AM CDT | Special Weather Statement | LIX | Wilkinson | 46 min |
| Apr 10, 12:41 AM CDT | Severe Thunderstorm Warning | LIX | Pearl River | 11 min |
| Apr 10, 12:46 AM CDT | Severe Thunderstorm Warning | LIX | Amite, Pike, Walthall | 43 min |
| Apr 10, 1:33 AM CDT | Special Weather Statement | LIX | Pearl River | 42 min |
| Apr 10, 1:45 AM CDT | Tornado Warning | LIX | Wilkinson | 45 min |
| Apr 10, 1:52 AM CDT | Special Weather Statement | LIX | Pearl River | 38 min |
| Apr 10, 2:05 AM CDT | Tornado Warning | LIX | Pearl River | 10 min |
| Apr 10, 2:42 AM CDT | Severe Thunderstorm Warning | LIX | Hancock, Harrison | 33 min |
| Apr 10, 2:58 AM CDT | Severe Thunderstorm Warning | LIX | Amite, Pike | 35 min |
| Apr 10, 3:11 AM CDT | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 49 min |
| Apr 10, 3:20 AM CDT | Severe Thunderstorm Warning | LIX | Amite, Wilkinson | 33 min |
| Apr 10, 3:29 AM CDT | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 31 min |
| Apr 10, 3:36 AM CDT | Special Weather Statement | LIX | Pearl River | 39 min |
| Apr 10, 3:55 AM CDT | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 14 min |
| Apr 10, 4:06 AM CDT | Flash Flood Warning | LIX | Hancock, Pearl River | 3 hr |
| Apr 10, 5:07 AM CDT | Special Weather Statement | LIX | Hancock | 23 min |
| Apr 10, 5:35 AM CDT | Special Weather Statement | LIX | Harrison | 25 min |
| Apr 10, 6:02 AM CDT | Areal Flood Advisory | LIX | Jackson | 3 hr |
| Apr 10, 9:49 AM CDT | River Flood Warning | LIX | Pike, Walthall | 56 hr |
| Apr 10, 9:58 AM CDT | River Flood Warning | LIX | Harrison | 25 hr |
| 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, 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, 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, 5:24 AM CDT | Flash Flood Warning | LIX | Saint Bernard | 3 hr |
| 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
Severe Thunderstorm Warnings in Louisiana, 2021Severe Thunderstorm Warnings in Mississippi, 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.