Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 7, NWS Lake Charles, LA

March 17, 20214 parishes in Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Mar 17, 2021, 4:19 PM CDT for 4 parishes in Louisiana. It was in force for 44 min. 1 report 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: Mar 17, 2021, 4:19 PM CDT (21:19 UTC)
Expired: Mar 17, 2021, 5:03 PM CDT
In force: 44 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 60.0 mph

Counties Acadia Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 45 km from the middle of the area, began a volume at 21:23 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
Mar 17, 4:19 PM CDT	TSTM WND GST 50	5 Nnw Grand Chenier, LA	A PERSONAL WEATHER STATION AT GRAND VIEW LODGE RECORDED A WIND GUST TO 50 MPH.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 17, 11:53 AM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.3 hours before the alert went out and 43 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: 458 J/kg
Mixed-layer CIN: -397 J/kg
Mixed-layer LCL: 1132 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 158 m²/s²
0-3 km storm-relative helicity: 247 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

369 
WUUS54 KLCH 172119
SVRLCH
LAC001-023-053-113-172215-
/O.NEW.KLCH.SV.W.0007.210317T2119Z-210317T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
419 PM CDT Wed Mar 17 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cameron Parish in southwestern Louisiana...
  Southeastern Jefferson Davis Parish in southwestern Louisiana...
  Southwestern Acadia Parish in southwestern Louisiana...
  Northwestern Vermilion Parish in southwestern Louisiana...

* Until 515 PM CDT.

* At 419 PM CDT, a severe thunderstorm was located near Grand
  Chenier, moving northeast at 45 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Crowley, Jennings, Lake Arthur, Iota, Mermentau, Lacassine National
  Wildlife Refuge, Grand Chenier, Klondike, Evangeline, Morse, Egan,
  Thornwell, Lowry, Estherwood and Midland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM CDT for southwestern
Louisiana.

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

&&

LAT...LON 2974 9297 2987 9312 3038 9254 3025 9229
TIME...MOT...LOC 2119Z 226DEG 41KT 2987 9298 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

Rua

3 follow-up statements

423 
WWUS54 KLCH 172133
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
433 PM CDT Wed Mar 17 2021

LAC001-023-053-113-172215-
/O.CON.KLCH.SV.W.0007.000000T0000Z-210317T2215Z/
Cameron LA-Jefferson Davis LA-Acadia LA-Vermilion LA-
433 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHEASTERN CAMERON...SOUTHEASTERN JEFFERSON DAVIS...
SOUTHWESTERN ACADIA AND NORTHWESTERN VERMILION PARISHES...

At 432 PM CDT, a severe thunderstorm was located over Lowry, or 7
miles southwest of Lake Arthur, moving northeast at 50 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Crowley, Jennings, Lake Arthur, Iota, Mermentau, Klondike,
Evangeline, Morse, Egan, Thornwell, Lowry, Estherwood and Midland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM CDT for southwestern
Louisiana.

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

&&

LAT...LON 2990 9276 3000 9292 3038 9254 3025 9229
TIME...MOT...LOC 2132Z 229DEG 46KT 3000 9277 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

Rua

697 
WWUS54 KLCH 172146
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
446 PM CDT Wed Mar 17 2021

LAC023-113-172155-
/O.CAN.KLCH.SV.W.0007.000000T0000Z-210317T2215Z/
Cameron LA-Vermilion LA-
446 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CAMERON AND
NORTHWESTERN VERMILION PARISHES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 600 PM CDT for southwestern
Louisiana.

LAT...LON 3012 9271 3034 9247 3025 9229 3020 9235
      3009 9252 3012 9255 3012 9256 3010 9258
      3010 9260 3009 9261 3009 9263 3007 9263
      3007 9265
TIME...MOT...LOC 2145Z 229DEG 47KT 3012 9261 

$$

LAC001-053-172215-
/O.CON.KLCH.SV.W.0007.000000T0000Z-210317T2215Z/
Jefferson Davis LA-Acadia LA-
446 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR SOUTHEASTERN JEFFERSON DAVIS AND SOUTHWESTERN ACADIA PARISHES...

At 445 PM CDT, a severe thunderstorm was located near Lake Arthur,
moving northeast at 50 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...
Crowley, Lake Arthur, Iota, Mermentau, Morse, Egan, Estherwood and
Midland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 600 PM CDT for southwestern
Louisiana.

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

&&

LAT...LON 3012 9271 3034 9247 3025 9229 3020 9235
      3009 9252 3012 9255 3012 9256 3010 9258
      3010 9260 3009 9261 3009 9263 3007 9263
      3007 9265
TIME...MOT...LOC 2145Z 229DEG 47KT 3012 9261 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Rua

857 
WWUS54 KLCH 172203
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
503 PM CDT Wed Mar 17 2021

LAC001-053-172213-
/O.CAN.KLCH.SV.W.0007.000000T0000Z-210317T2215Z/
Jefferson Davis LA-Acadia LA-
503 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JEFFERSON DAVIS
AND SOUTHWESTERN ACADIA PARISHES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 600 PM CDT for southwestern
Louisiana.

LAT...LON 3012 9271 3034 9247 3025 9229 3020 9235
      3009 9252 3012 9255 3012 9256 3010 9258
      3010 9260 3009 9261 3009 9263 3007 9263
      3007 9265
TIME...MOT...LOC 2202Z 226DEG 41KT 3027 9243 

$$

Rua

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 2:53 AM CDT	Wind Advisory	LCH	Avoyelles, Cameron, Evangeline, Lafayette, Saint Landry, Saint Martin	16 hr
Mar 17, 2:55 AM CDT	Marine Dense Fog Advisory	LCH		11 hr
Mar 17, 2:55 AM CDT	Small Craft Advisory	LCH		52 hr
Mar 17, 12:39 PM CDT	Special Weather Statement	LCH	Cameron	51 min
Mar 17, 12:48 PM CDT	Special Weather Statement	LCH	Calcasieu	42 min
Mar 17, 1:24 PM CDT	Severe Thunderstorm Warning	LCH	Acadia, Cameron, Jefferson Davis, Vermilion	36 min
Mar 17, 1:33 PM CDT	Special Marine Warning	LCH		57 min
Mar 17, 1:40 PM CDT	Special Weather Statement	LCH	Allen	35 min
Mar 17, 1:46 PM CDT	Special Weather Statement	LCH	Vernon	29 min
Mar 17, 2:01 PM CDT	Special Weather Statement	LCH	Acadia, Jefferson Davis	44 min
Mar 17, 2:30 PM CDT	Special Marine Warning	LCH		60 min
Mar 17, 2:32 PM CDT	Special Weather Statement	LCH	Beauregard	43 min
Mar 17, 2:41 PM CDT	Small Craft Advisory	LCH		40 hr
Mar 17, 3:03 PM CDT	Special Weather Statement	LCH	Vermilion	42 min
Mar 17, 3:28 PM CDT	Special Marine Warning	LCH		62 min
Mar 17, 3:42 PM CDT	Special Weather Statement	LCH	Rapides	48 min
Mar 17, 3:44 PM CDT	Special Weather Statement	LCH	Saint Martin	46 min
Mar 17, 3:53 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary	52 min
Mar 17, 3:58 PM CDT	Severe Thunderstorm Warning	LCH	Cameron, Vermilion	62 min
Mar 17, 4:35 PM CDT	Special Marine Warning	LCH		55 min
Mar 17, 4:49 PM CDT	Special Weather Statement	LCH	Saint Martin	41 min
Mar 17, 5:00 PM CDT	Special Weather Statement	LCH	Acadia, Saint Landry	30 min
Mar 17, 5:31 PM CDT	Special Marine Warning	LCH		89 min
Mar 17, 6:08 PM CDT	Special Weather Statement	LCH	Iberia, St. Mary	97 min
Mar 17, 6:21 PM CDT	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary	39 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.