Alert archive / Mississippi / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 154, NWS New Orleans, LA

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

NWS New Orleans, LA issued this severe thunderstorm warning at Dec 6, 2021, 3:09 PM CST for Saint Tammany Parish, Louisiana; Hancock County, Pearl River County, Mississippi. It was in force for 66 min. 3 reports 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: Dec 6, 2021, 3:09 PM CST (21:09 UTC)
Expired: Dec 6, 2021, 4:15 PM CST
In force: 66 min
Issued by: NWS New Orleans, LA
Area: Storm-based polygon
Tornado: Possible
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

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

What was reported inside it

Time	Report	Where	Remark
Dec 6, 3:16 PM CST	TSTM WND DMG	7 Nne Lacombe, LA	ONE SMALL PINE TREE UPROOTED AND SEVERAL LARGE TREE BRANCHES SNAPPED ON PUTT MORAN LOOP/.
Dec 6, 3:16 PM CST	TSTM WND DMG	9 Ese Abita Springs, LA	PINE TREE SNAPPED ON JOHN BENNETT RD.
Dec 6, 3:24 PM CST	TSTM WND DMG	5 Nw Pearl River, LA	HAM RADIO OPERATOR RELAYED A REPORT OF A DOWNED WATER OAK ON DEER RUN RD APPROXIMATELY 1 MILE NORTH OF HWY 36. TIME ESTIMATED BASED ON 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 12:00Z, 9.2 hours before the alert went out and 5 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.

886 
WUUS54 KLIX 062109
SVRLIX
LAC103-MSC045-109-062215-
/O.NEW.KLIX.SV.W.0154.211206T2109Z-211206T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
309 PM CST Mon Dec 6 2021

The National Weather Service in New Orleans has issued a

* Severe Thunderstorm Warning for...
  Southeastern St. Tammany Parish in southeastern Louisiana...
  Hancock County in southern Mississippi...
  Southwestern Pearl River County in southern Mississippi...

* Until 415 PM CST.

* At 309 PM CST, a severe thunderstorm was located near Abita
  Springs, or 10 miles east of Covington, moving east at 35 mph.

  HAZARD...70 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Slidell, Picayune, Pearl River, Kiln, Pearlington, Lacombe, Stennis
  Space Center, Shoreline Park and Slidell Airport.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 261 and 273.
 Interstate 10 in Mississippi between mile markers 1 and 13.
 Interstate 12 between mile markers 73 and 84.
 Interstate 59 in Louisiana between mile markers 1 and 11.
 Interstate 59 in Mississippi between mile markers 1 and 8.

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 3056 8940 3023 8942 3018 8945 3019 8953
      3015 8961 3016 8962 3017 8958 3018 8961
      3016 8963 3018 8968 3017 8972 3021 8978
      3022 8985 3025 8987 3026 8998 3057 8987
TIME...MOT...LOC 2109Z 280DEG 32KT 3042 8995 

TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

CAB

4 follow-up statements

232 
WWUS54 KLIX 062129
SVSLIX

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

LAC103-MSC045-109-062215-
/O.CON.KLIX.SV.W.0154.000000T0000Z-211206T2215Z/
St. Tammany LA-Hancock MS-Pearl River MS-
329 PM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CST
FOR SOUTHEASTERN ST. TAMMANY PARISH...HANCOCK AND SOUTH CENTRAL PEARL
RIVER COUNTIES...

At 329 PM CST, a severe thunderstorm was located over Pearl River, or
7 miles north of Slidell, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Slidell, Picayune, Pearl River, Kiln, Pearlington, Stennis Space
Center, Shoreline Park and Slidell Airport.

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 261 and 273.
 Interstate 10 in Mississippi between mile markers 1 and 13.
 Interstate 12 between mile markers 80 and 84.
 Interstate 59 in Louisiana between mile markers 1 and 11.
 Interstate 59 in Mississippi between mile markers 1 and 8.

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 3056 8940 3023 8942 3018 8945 3019 8953
      3015 8961 3016 8962 3017 8958 3018 8961
      3016 8963 3018 8968 3017 8972 3021 8978
      3022 8985 3025 8987 3057 8974
TIME...MOT...LOC 2129Z 280DEG 32KT 3039 8974 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CAB

614 
WWUS54 KLIX 062146
SVSLIX

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

LAC103-MSC045-109-062215-
/O.CON.KLIX.SV.W.0154.000000T0000Z-211206T2215Z/
St. Tammany LA-Hancock MS-Pearl River MS-
346 PM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CST
FOR SOUTHEASTERN ST. TAMMANY PARISH...HANCOCK AND SOUTH CENTRAL PEARL
RIVER COUNTIES...

At 345 PM CST, a severe thunderstorm was located over Stennis Space
Center, or 12 miles west of Diamondhead, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Kiln, Pearlington, Stennis Space Center and Shoreline Park. 

This includes the following Interstates...
 Interstate 10 in Louisiana between mile markers 270 and 273.
 Interstate 10 in Mississippi between mile markers 1 and 13.

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 3056 8940 3023 8942 3018 8945 3019 8953
      3015 8961 3016 8962 3017 8958 3018 8961
      3016 8963 3018 8968 3017 8972 3021 8978
      3041 8963 3056 8960
TIME...MOT...LOC 2145Z 280DEG 32KT 3036 8957 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CAB

297 
WWUS54 KLIX 062148
SVSLIX

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

LAC103-MSC109-062158-
/O.CAN.KLIX.SV.W.0154.000000T0000Z-211206T2215Z/
St. Tammany LA-Pearl River MS-
348 PM CST Mon Dec 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ST. TAMMANY
PARISH IN SOUTHEASTERN LOUISIANA AND SOUTH CENTRAL PEARL RIVER
COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.

LAT...LON 3025 8942 3023 8942 3026 8962 3029 8963
      3041 8963 3050 8961 3050 8960 3052 8959
      3052 8955 3056 8954 3056 8940
TIME...MOT...LOC 2148Z 280DEG 32KT 3036 8954 

$$

MSC045-062215-
/O.CON.KLIX.SV.W.0154.000000T0000Z-211206T2215Z/
Hancock MS-
348 PM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CST
FOR CENTRAL HANCOCK COUNTY...

At 348 PM CST, a severe thunderstorm was located near Stennis Space
Center, or 10 miles west of Diamondhead, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Kiln, Stennis Space Center, Shoreline Park and Pearlington. 

This includes Interstate 10 in Mississippi between mile markers 2 and
13.
 
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 3025 8942 3023 8942 3026 8962 3029 8963
      3041 8963 3050 8961 3050 8960 3052 8959
      3052 8955 3056 8954 3056 8940
TIME...MOT...LOC 2148Z 280DEG 32KT 3036 8954 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CAB

643 
WWUS54 KLIX 062158
SVSLIX

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

MSC045-062215-
/O.CON.KLIX.SV.W.0154.000000T0000Z-211206T2215Z/
Hancock MS-
358 PM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM CST
FOR CENTRAL HANCOCK COUNTY...

At 357 PM CST, a severe thunderstorm was located over Shoreline Park,
or near Diamondhead, moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
Kiln, Shoreline Park and Pearlington. 

This includes Interstate 10 in Mississippi between mile markers 6 and
13.
 
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 3025 8942 3023 8942 3026 8962 3033 8956
      3039 8956 3056 8949 3056 8940
TIME...MOT...LOC 2157Z 280DEG 32KT 3034 8944 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

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, 2:56 PM CST	Tornado Warning	LIX	Saint Tammany	49 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

Severe Thunderstorm Warnings in Mississippi, 2021 Severe Thunderstorm Warnings in Louisiana, 2021 Every 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.