Alert archive / Louisiana / Tornado Warnings in 2021

Tornado Warning 76, NWS New Orleans, LA

December 6, 2021Saint Tammany Parish, Louisiana; Pearl River County, Mississippi

NWS New Orleans, LA issued this tornado warning at Dec 6, 2021, 2:56 PM CST for Saint Tammany Parish, Louisiana; Pearl River County, Mississippi. It was in force for 49 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: Dec 6, 2021, 2:56 PM CST (20:56 UTC)
Expired: Dec 6, 2021, 3:45 PM CST
In force: 49 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Saint Tammany Parish, LA, Pearl River County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.9 hours before the alert went out and 42 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 720 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 680 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 201 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

As transmitted.

177 
WFUS54 KLIX 062056
TORLIX
LAC103-MSC109-062145-
/O.NEW.KLIX.TO.W.0076.211206T2056Z-211206T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service New Orleans LA
256 PM CST Mon Dec 6 2021

The National Weather Service in New Orleans has issued a

* Tornado Warning for...
  North central St. Tammany Parish in southeastern Louisiana...
  Southwestern Pearl River County in southern Mississippi...

* Until 345 PM CST.
    
* At 256 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Sun, or 12 miles southwest of Bogalusa, moving
  east at 35 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* This dangerous storm will be near...
  Sun and Bush around 305 PM CST.
  Picayune around 330 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. 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 3066 8964 3051 8970 3058 9003 3067 9003
TIME...MOT...LOC 2056Z 275DEG 29KT 3064 8999 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

CAB

3 follow-up statements

177 
WWUS54 KLIX 062102
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
302 PM CST Mon Dec 6 2021

LAC103-MSC109-062145-
/O.CON.KLIX.TO.W.0076.000000T0000Z-211206T2145Z/
St. Tammany LA-Pearl River MS-
302 PM CST Mon Dec 6 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CST FOR NORTH
CENTRAL ST. TAMMANY PARISH IN SOUTHEASTERN LOUISIANA AND SOUTHWESTERN
PEARL RIVER COUNTIES...
    
At 302 PM CST, a severe thunderstorm capable of producing a tornado
was located near Sun, or 11 miles southwest of Bogalusa, moving east
at 25 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

This dangerous storm will be near...
  Picayune around 340 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. 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 3066 8964 3051 8970 3058 9000 3067 8998
TIME...MOT...LOC 2102Z 276DEG 24KT 3063 8995 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...<.75 IN

$$

CAB

528 
WWUS54 KLIX 062124
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
324 PM CST Mon Dec 6 2021

LAC103-MSC109-062145-
/O.CON.KLIX.TO.W.0076.000000T0000Z-211206T2145Z/
St. Tammany LA-Pearl River MS-
324 PM CST Mon Dec 6 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CST FOR NORTH
CENTRAL ST. TAMMANY PARISH IN SOUTHEASTERN LOUISIANA AND SOUTHWESTERN
PEARL RIVER COUNTIES...

At 324 PM CST, a severe squall line capable of producing both
tornadoes and extensive straight line wind damage was located near
Picayune, moving east at 35 mph.

HAZARD...Tornado.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

These dangerous storms will be near...
  Picayune around 335 PM CST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. 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 3066 8964 3051 8970 3055 8988 3066 8985
TIME...MOT...LOC 2124Z 275DEG 29KT 3061 8974 

TORNADO...RADAR INDICATED
MAX HAIL SIZE...0.00 IN

$$

CAB

049 
WWUS54 KLIX 062138 RRA
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
338 PM CST Mon Dec 6 2021

LAC103-MSC109-062148-
/O.EXP.KLIX.TO.W.0076.000000T0000Z-211206T2145Z/
St. Tammany LA-Pearl River MS-
338 PM CST Mon Dec 6 2021

...THE TORNADO WARNING FOR NORTH CENTRAL ST. TAMMANY PARISH IN
SOUTHEASTERN LOUISIANA AND SOUTHWESTERN PEARL RIVER COUNTIES WILL
EXPIRE AT 345 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 3066 8964 3051 8970 3055 8988 3066 8985
TIME...MOT...LOC 2138Z 275DEG 29KT 3060 8962 

$$

CAB

The office that day

Everything else NWS New Orleans, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 6, 11:08 AM CST	Special Weather Statement	LIX	East Feliciana	67 min
Dec 6, 12:01 PM CST	Special Weather Statement	LIX	Saint Helena	74 min
Dec 6, 12:21 PM CST	Severe Thunderstorm Warning	LIX	East Feliciana, Saint Helena	54 min
Dec 6, 12:46 PM CST	Severe Thunderstorm Warning	LIX	Tangipahoa, Washington	59 min
Dec 6, 1:22 PM CST	Tornado Warning	LIX	Tangipahoa, Washington	68 min
Dec 6, 1:29 PM CST	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa, Washington	61 min
Dec 6, 1:40 PM CST	Special Weather Statement	LIX	Saint Helena	65 min
Dec 6, 1:44 PM CST	Severe Thunderstorm Warning	LIX	Livingston, Saint Helena	61 min
Dec 6, 1:54 PM CST	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa	66 min
Dec 6, 2:21 PM CST	Severe Thunderstorm Warning	LIX	Saint Tammany, Washington	39 min
Dec 6, 2:24 PM CST	Tornado Warning	LIX	Washington	21 min
Dec 6, 2:30 PM CST	Severe Thunderstorm Warning	LIX	Livingston, Saint Tammany, Tangipahoa	60 min
Dec 6, 2:35 PM CST	Tornado Warning	LIX	Saint Tammany, Washington	55 min
Dec 6, 2:41 PM CST	Special Marine Warning	LIX		64 min
Dec 6, 2:51 PM CST	Flash Flood Warning	LIX	Ascension, East Baton Rouge, West Baton Rouge	116 min
Dec 6, 2:51 PM CST	Tornado Warning	LIX	Saint Tammany	39 min
Dec 6, 3:09 PM CST	Severe Thunderstorm Warning Considerable damage threat	LIX	Saint Tammany	66 min
Dec 6, 3:20 PM CST	Tornado Warning	LIX	Saint Tammany	30 min
Dec 6, 3:26 PM CST	Special Marine Warning	LIX		64 min
Dec 6, 4:14 PM CST	Special Marine Warning	LIX		91 min
Dec 6, 5:24 PM CST	Special Marine Warning	LIX		66 min
Dec 6, 9:52 AM CST	Special Weather Statement	LIX	Wilkinson	53 min
Dec 6, 3:31 PM CST	Tornado Warning	LIX	Pearl River	7 min
Dec 6, 3:36 PM CST	Tornado Warning	LIX	Hancock	28 min
Dec 6, 4:07 PM CST	Special Weather Statement	LIX	Harrison	23 min

Nearby

Tornado Warnings in Louisiana, 2021 Tornado Warnings in Mississippi, 2021 Every tornado warning in 2021 Tornadoes 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.