Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 147, NWS New Orleans, LA

December 6, 2021Amite County, Mississippi; East Feliciana Parish, Saint Helena Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Dec 6, 2021, 12:21 PM CST for Amite County, Mississippi; East Feliciana Parish, Saint Helena Parish, Louisiana. It was in force for 54 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, 12:21 PM CST (18:21 UTC)
Expired
Dec 6, 2021, 1:15 PM CST
In force
54 min
Issued by
NWS New Orleans, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties East Feliciana Parish, LA, Saint Helena Parish, LA, Amite County, MS

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.4 hours before the alert went out and 122 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2021-12-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 720 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2021-12-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 180 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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.

718 
WUUS54 KLIX 061821
SVRLIX
LAC037-091-MSC005-061915-
/O.NEW.KLIX.SV.W.0147.211206T1821Z-211206T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New Orleans LA
1221 PM CST Mon Dec 6 2021

The National Weather Service in New Orleans has issued a

* Severe Thunderstorm Warning for...
  St. Helena Parish in southeastern Louisiana...
  Northeastern East Feliciana Parish in southeastern Louisiana...
  Southeastern Amite County in southern Mississippi...

* Until 115 PM CST.

* At 1221 PM CST, a severe thunderstorm was located near Darlington,
  or 10 miles northwest of Greensburg, moving east at 20 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Clinton, Greensburg, Felps, Darlington, Gillsberg and Easleyville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3104 9055 3100 9055 3100 9057 3068 9057
      3087 9109 3104 9087
TIME...MOT...LOC 1821Z 274DEG 16KT 3091 9082 

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

$$

CAB
1 follow-up statement
358 
WWUS54 KLIX 061844
SVSLIX

Severe Weather Statement
National Weather Service New Orleans LA
1244 PM CST Mon Dec 6 2021

LAC037-MSC005-061853-
/O.CAN.KLIX.SV.W.0147.000000T0000Z-211206T1915Z/
East Feliciana LA-Amite MS-
1244 PM CST Mon Dec 6 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN EAST FELICIANA
PARISH IN SOUTHEASTERN LOUISIANA AND SOUTHEASTERN AMITE COUNTIES IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3068 9057 3086 9086 3100 9082 3100 9057
TIME...MOT...LOC 1843Z 284DEG 23KT 3087 9066 

$$

LAC091-061915-
/O.CON.KLIX.SV.W.0147.000000T0000Z-211206T1915Z/
St. Helena LA-
1244 PM CST Mon Dec 6 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM CST
FOR ST. HELENA PARISH...

At 1243 PM CST, a severe thunderstorm was located over Greensburg,
moving east at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Greensburg, Easleyville and Darlington. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3068 9057 3086 9086 3100 9082 3100 9057
TIME...MOT...LOC 1843Z 284DEG 23KT 3087 9066 

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.

IssuedProductOfficeCountiesLasted
Dec 6, 9:52 AM CSTSpecial Weather StatementLIXWilkinson53 min
Dec 6, 2:35 PM CSTTornado WarningLIXPearl River55 min
Dec 6, 2:56 PM CSTTornado WarningLIXPearl River49 min
Dec 6, 3:09 PM CSTSevere Thunderstorm Warning Considerable damage threatLIXHancock, Pearl River66 min
Dec 6, 3:20 PM CSTTornado WarningLIXHancock30 min
Dec 6, 3:31 PM CSTTornado WarningLIXPearl River7 min
Dec 6, 3:36 PM CSTTornado WarningLIXHancock28 min
Dec 6, 4:07 PM CSTSpecial Weather StatementLIXHarrison23 min
Dec 6, 11:08 AM CSTSpecial Weather StatementLIXEast Feliciana67 min
Dec 6, 12:01 PM CSTSpecial Weather StatementLIXSaint Helena74 min
Dec 6, 12:46 PM CSTSevere Thunderstorm WarningLIXTangipahoa, Washington59 min
Dec 6, 1:22 PM CSTTornado WarningLIXTangipahoa, Washington68 min
Dec 6, 1:29 PM CSTSevere Thunderstorm WarningLIXSaint Helena, Tangipahoa, Washington61 min
Dec 6, 1:40 PM CSTSpecial Weather StatementLIXSaint Helena65 min
Dec 6, 1:44 PM CSTSevere Thunderstorm WarningLIXLivingston, Saint Helena61 min
Dec 6, 1:54 PM CSTSevere Thunderstorm WarningLIXSaint Helena, Tangipahoa66 min
Dec 6, 2:21 PM CSTSevere Thunderstorm WarningLIXSaint Tammany, Washington39 min
Dec 6, 2:24 PM CSTTornado WarningLIXWashington21 min
Dec 6, 2:30 PM CSTSevere Thunderstorm WarningLIXLivingston, Saint Tammany, Tangipahoa60 min
Dec 6, 2:41 PM CSTSpecial Marine WarningLIX64 min
Dec 6, 2:51 PM CSTFlash Flood WarningLIXAscension, East Baton Rouge, West Baton Rouge116 min
Dec 6, 2:51 PM CSTTornado WarningLIXSaint Tammany39 min
Dec 6, 3:26 PM CSTSpecial Marine WarningLIX64 min
Dec 6, 4:14 PM CSTSpecial Marine WarningLIX91 min
Dec 6, 5:24 PM CSTSpecial Marine WarningLIX66 min

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.