Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 127, NWS Lake Charles, LA

December 18, 2021Calcasieu Parish, Cameron Parish, Jefferson Davis Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Dec 18, 2021, 2:20 PM CST for Calcasieu Parish, Cameron Parish, Jefferson Davis Parish, Louisiana. It was in force for 25 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 18, 2021, 2:20 PM CST (20:20 UTC)
Expired: Dec 18, 2021, 2:45 PM CST
In force: 25 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Calcasieu Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA

The radar

The Lake Charles radar (KLCH), 27 km from the middle of the area, began a volume at 20:18 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.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 8.3 hours before the alert went out and 25 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.

472 
WUUS54 KLCH 182020
SVRLCH
LAC019-023-053-182045-
/O.NEW.KLCH.SV.W.0127.211218T2020Z-211218T2045Z/

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

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cameron Parish in southwestern Louisiana...
  South central Jefferson Davis Parish in southwestern Louisiana...
  Southeastern Calcasieu Parish in southwestern Louisiana...

* Until 245 PM CST.

* At 219 PM CST, severe thunderstorms were located along a line
  extending from Holmwood to 6 miles southeast of Heberts Marina,
  moving southeast 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...
  Cameron, Lake Arthur, Grand Chenier, Lacassine National Wildlife
  Refuge, Hayes, Thornwell, Hacketts Corner, Lowry, Sweet Lake,
  Gibbstown, Holmwood and Bell City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2986 9324 2993 9324 2997 9327 3017 9313
      3007 9266 3004 9272 3004 9268 2974 9291
TIME...MOT...LOC 2019Z 310DEG 30KT 3011 9306 2991 9323 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

tingler

1 follow-up statement

870 
WWUS54 KLCH 182039
SVSLCH

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

LAC019-053-182048-
/O.CAN.KLCH.SV.W.0127.000000T0000Z-211218T2045Z/
Jefferson Davis LA-Calcasieu LA-
239 PM CST Sat Dec 18 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL JEFFERSON DAVIS
AND SOUTHEASTERN CALCASIEU PARISHES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 2984 9320 3003 9308 3003 9270 3002 9269
      2974 9291
TIME...MOT...LOC 2038Z 310DEG 30KT 3001 9293 2981 9310 

$$

LAC023-182045-
/O.CON.KLCH.SV.W.0127.000000T0000Z-211218T2045Z/
Cameron LA-
239 PM CST Sat Dec 18 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM CST
FOR NORTHEASTERN CAMERON PARISH...

At 238 PM CST, severe thunderstorms were located along a line
extending from Lacassine National Wildlife Refuge to Creole, moving
southeast 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...
Grand Chenier, Lacassine National Wildlife Refuge, Lowry, Gibbstown
and Hacketts Corner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 2984 9320 3003 9308 3003 9270 3002 9269
      2974 9291
TIME...MOT...LOC 2038Z 310DEG 30KT 3001 9293 2981 9310 

TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

tingler

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, 1:30 PM CST	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Calcasieu, Jefferson Davis, Vernon	49 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, 2:45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.