Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 104, NWS Lake Charles, LA

July 20, 2021Calcasieu Parish, Jefferson Davis Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Jul 20, 2021, 3:41 AM CDT for Calcasieu Parish, Jefferson Davis Parish, Louisiana. It was in force for 30 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: Jul 20, 2021, 3:41 AM CDT (08:41 UTC)
Expired: Jul 20, 2021, 4:11 AM CDT
In force: 30 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Calcasieu Parish, LA, Jefferson Davis Parish, LA

The radar

The Lake Charles radar (KLCH), 24 km from the middle of the area, began a volume at 08:41 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 00:00Z, 8.7 hours before the alert went out and 23 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: 1097 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 975 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

455 
WUUS54 KLCH 200841
SVRLCH
LAC019-053-200945-
/O.NEW.KLCH.SV.W.0104.210720T0841Z-210720T0945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
341 AM CDT Tue Jul 20 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Central Jefferson Davis Parish in southwestern Louisiana...
  Southeastern Calcasieu Parish in southwestern Louisiana...

* Until 445 AM CDT.

* At 341 AM CDT, severe thunderstorms were located along a line
  extending from near Westlake to near Lake Charles to near Grand
  Lake, moving east at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lake Charles, Sulphur, Westlake, Welsh, Iowa, Fenton, Lake Charles
  Regional Airport, Hayes, Moss Bluff, Buller, Lebleu Settlement,
  Gillis, Pine Island, Holmwood, Bell City and Lacassine.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 25 and 57.
 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.

&&

LAT...LON 3044 9279 3028 9276 3005 9281 3006 9337
      3021 9330 3035 9336
TIME...MOT...LOC 0841Z 261DEG 24KT 3030 9327 3023 9323 3008 9330 

HAIL...<.75IN
WIND...60MPH
 
$$

Landreneau

3 follow-up statements

144 
WWUS54 KLCH 200853
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
353 AM CDT Tue Jul 20 2021

LAC019-053-200945-
/O.CON.KLCH.SV.W.0104.000000T0000Z-210720T0945Z/
Jefferson Davis LA-Calcasieu LA-
353 AM CDT Tue Jul 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 AM CDT
FOR CENTRAL JEFFERSON DAVIS AND SOUTHEASTERN CALCASIEU PARISHES...

At 353 AM CDT, severe thunderstorms were located along a line
extending from Moss Bluff to Lebleu Settlement to near Holmwood to
Lake Charles Regional Airport, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lake Charles, Westlake, Welsh, Iowa, Fenton, Lake Charles Regional
Airport, Hayes, Moss Bluff, Buller, Lebleu Settlement, Gillis, Pine
Island, Holmwood, Bell City and Lacassine.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3044 9279 3028 9276 3005 9281 3011 9323
      3024 9328 3037 9323
TIME...MOT...LOC 0853Z 269DEG 26KT 3032 9319 3028 9311 3018 9308 3011
9320

HAIL...<.75IN
WIND...60MPH
 
$$

Landreneau

423 
WWUS54 KLCH 200902
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
402 AM CDT Tue Jul 20 2021

LAC019-053-200945-
/O.CON.KLCH.SV.W.0104.000000T0000Z-210720T0945Z/
Jefferson Davis LA-Calcasieu LA-
402 AM CDT Tue Jul 20 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 AM CDT
FOR CENTRAL JEFFERSON DAVIS AND SOUTHEASTERN CALCASIEU PARISHES...

At 402 AM CDT, severe thunderstorms were located along a line
extending from near Gillis to Lebleu Settlement to near Iowa to near
Holmwood, moving east at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Welsh, Iowa, Fenton, Hayes, Pine Island, Buller, Lebleu Settlement,
Holmwood, Lacassine and Bell City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3044 9279 3028 9276 3005 9281 3009 9312
      3021 9313 3035 9317
TIME...MOT...LOC 0902Z 260DEG 24KT 3034 9315 3029 9306 3019 9303 3009
9311

HAIL...<.75IN
WIND...60MPH
 
$$

Landreneau

111 
WWUS54 KLCH 200911
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
411 AM CDT Tue Jul 20 2021

LAC019-053-200921-
/O.CAN.KLCH.SV.W.0104.000000T0000Z-210720T0945Z/
Jefferson Davis LA-Calcasieu LA-
411 AM CDT Tue Jul 20 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL JEFFERSON DAVIS AND
SOUTHEASTERN CALCASIEU PARISHES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.

LAT...LON 3044 9279 3028 9276 3005 9281 3009 9312
      3021 9313 3035 9317
TIME...MOT...LOC 0910Z 261DEG 24KT 3035 9309 3030 9300 3020 9297 3010
9305

$$

Landreneau

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 11:39 PM CDT	Special Marine Warning	LCH		36 min
Jul 20, 2:06 AM CDT	Special Weather Statement	LCH	Lafayette	69 min
Jul 20, 2:37 AM CDT	Special Weather Statement	LCH	Beauregard, Calcasieu	53 min
Jul 20, 3:18 AM CDT	Special Weather Statement	LCH	Calcasieu	42 min
Jul 20, 9:15 AM CDT	River Flood Warning	LCH	Lafayette, Saint Martin, Vermilion	36 hr
Jul 20, 9:15 AM CDT	River Flood Warning	LCH	Acadia, Evangeline, Saint Landry	71 hr
Jul 20, 10:33 AM CDT	Flash Flood Warning	LCH	Acadia, Jefferson Davis, Saint Landry	3 hr

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.