Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 125, NWS Lake Charles, LA

December 18, 20215 parishes in Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Dec 18, 2021, 1:30 PM CST for 5 parishes in Louisiana. It was in force for 49 min. 4 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 18, 2021, 1:30 PM CST (19:30 UTC)
Expired: Dec 18, 2021, 2:19 PM CST
In force: 49 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

Counties Allen Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Jefferson Davis Parish, LA, Vernon Parish, LA

The radar

The Ft Polk radar (KPOE), 51 km from the middle of the area, began a volume at 19:34 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Dec 18, 1:30 PM CST	TSTM WND DMG	3 Nw Ragley, LA	TREES DOWN ON LEO COOLEY RD NEAR RAGLEY.
Dec 18, 1:30 PM CST	TSTM WND DMG	5 N Longville, LA	TREES DOWN BETWEEN LONGVILLE AND DERIDDER.
Dec 18, 1:30 PM CST	TSTM WND DMG	Longville, LA	TREES DOWN IN LONGVILLE.
Dec 18, 1:35 PM CST	TSTM WND DMG	3 Ne Gillis, LA	A TREE FELL ON A POWERLINE NEAR THE PARISH LINE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 7.5 hours before the alert went out and 66 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: 1750 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 441 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.7

Open this sounding in Storm Lab

The text

As transmitted.

790 
WUUS54 KLCH 181930
SVRLCH
LAC003-011-019-053-115-182030-
/O.NEW.KLCH.SV.W.0125.211218T1930Z-211218T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
130 PM CST Sat Dec 18 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Northwestern Jefferson Davis Parish in southwestern Louisiana...
  Eastern Beauregard Parish in southwestern Louisiana...
  Central Calcasieu Parish in southwestern Louisiana...
  Southeastern Vernon Parish in west central Louisiana...
  Allen Parish in southwestern Louisiana...

* Until 230 PM CST.

* At 130 PM CST, severe thunderstorms were located along a line
  extending from 6 miles east of De Ridder to near Edgerly, moving
  east at 20 mph.

  HAZARD...60 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lake Charles, Sulphur, De Ridder, Westlake, Vinton, Elizabeth,
  Reeves, Dry Creek, Moss Bluff, Sugartown, De Quincy, Ragley, Lake
  Charles Regional Airport, Mittie, Grant, Topsy, Lebleu Settlement,
  Gillis, Edgerly and Leblanc.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 11 and 42.
 Interstate 210 between mile markers 1 and 12.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3092 9283 3089 9282 3090 9264 3009 9312
      3021 9364 3093 9322
TIME...MOT...LOC 1930Z 278DEG 17KT 3086 9318 3024 9354 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Donato

2 follow-up statements

970 
WWUS54 KLCH 182000 RRA
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
200 PM CST Sat Dec 18 2021

LAC003-011-019-053-115-182030-
/O.CON.KLCH.SV.W.0125.000000T0000Z-211218T2030Z/
Jefferson Davis LA-Beauregard LA-Calcasieu LA-Vernon LA-Allen LA-
200 PM CST Sat Dec 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CST
FOR NORTHWESTERN JEFFERSON DAVIS...EASTERN BEAUREGARD...CENTRAL
CALCASIEU...SOUTHEASTERN VERNON AND ALLEN PARISHES...

At 200 PM CST, severe thunderstorms were located along a line
extending from Sugartown to Sulphur, moving east at 20 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Lake Charles, Sulphur, Westlake, Elizabeth, Reeves, Dry Creek, Lake
Charles Regional Airport, Moss Bluff, Sugartown, Mittie, Ragley,
Grant, Carlyss, Longville, Buller, Buhler, Harmony, Topsy, Lebleu
Settlement and Gillis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3092 9283 3089 9282 3090 9264 3009 9312
      3017 9349 3093 9304
TIME...MOT...LOC 2000Z 278DEG 17KT 3084 9302 3022 9339 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Donato

726 
WWUS54 KLCH 182019
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
219 PM CST Sat Dec 18 2021

LAC003-011-019-053-115-182028-
/O.CAN.KLCH.SV.W.0125.000000T0000Z-211218T2030Z/
Jefferson Davis LA-Beauregard LA-Calcasieu LA-Vernon LA-Allen LA-
219 PM CST Sat Dec 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN JEFFERSON
DAVIS...EASTERN BEAUREGARD...CENTRAL CALCASIEU...SOUTHEASTERN VERNON
AND ALLEN PARISHES IS CANCELLED...

The storms which prompted the warning have weakened. Therefore, the 
warning has been cancelled.

LAT...LON 3092 9283 3089 9282 3090 9264 3009 9312
      3017 9349 3093 9304
TIME...MOT...LOC 2016Z 278DEG 17KT 3083 9293 3021 9330 

$$

Donato

The office that day

Everything else NWS Lake Charles, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 18, 3:25 AM CST	Small Craft Advisory	LCH		57 hr
Dec 18, 12:52 PM CST	Severe Thunderstorm Warning	LCH	Beauregard, Calcasieu, Vernon	38 min
Dec 18, 1:30 PM CST	Special Marine Warning	LCH		30 min
Dec 18, 1:32 PM CST	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron	58 min
Dec 18, 1:43 PM CST	Special Weather Statement	LCH	Rapides	32 min
Dec 18, 1:47 PM CST	Special Marine Warning	LCH		58 min
Dec 18, 2:15 PM CST	Special Weather Statement	LCH	Acadia, Allen, Evangeline, Jefferson Davis	45 min
Dec 18, 2:20 PM CST	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron, Jefferson Davis	25 min
Dec 18, 2:45 PM CST	Special Weather Statement	LCH	Cameron	60 min
Dec 18, 2:50 PM CST	Special Marine Warning	LCH		85 min
Dec 18, 3:00 PM CST	Special Weather Statement	LCH	Acadia, Saint Landry	30 min
Dec 18, 3:56 PM CST	Special Weather Statement	LCH	Lafayette, Saint Martin	34 min
Dec 18, 4:40 PM CST	Special Weather Statement	LCH	Iberia, Lafayette, Saint Martin, St. Mary	65 min

Nearby

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; radar from the NEXRAD Level II archive.