Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 90, NWS Lake Charles, LA

May 17, 2021Acadia Parish, Lafayette Parish, Vermilion Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 17, 2021, 5:12 PM CDT for Acadia Parish, Lafayette Parish, Vermilion Parish, Louisiana. It was in force for 48 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
May 17, 2021, 5:12 PM CDT (22:12 UTC)
Expired
May 17, 2021, 6:00 PM CDT
In force
48 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Acadia Parish, LA, Lafayette Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 87 km from the middle of the area, began a volume at 22:11 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, 10.2 hours before the alert went out and 85 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, Lake Charles Mun, LA at 12:00Z on 2021-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 626 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 12:00Z on 2021-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 207 square meters per square second.193958Sfc1 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
626 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
699 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
207 m²/s²
0-3 km storm-relative helicity
314 m²/s²
Significant tornado parameter
0.7
Supercell composite
10.3

Open this sounding in Storm Lab

The text

As transmitted.

087 
WUUS54 KLCH 172212
SVRLCH
LAC001-055-113-172300-
/O.NEW.KLCH.SV.W.0090.210517T2212Z-210517T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
512 PM CDT Mon May 17 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Southwestern Lafayette Parish in south central Louisiana...
  Southeastern Acadia Parish in southwestern Louisiana...
  North central Vermilion Parish in southwestern Louisiana...

* Until 600 PM CDT.

* At 512 PM CDT, a severe thunderstorm was located over Lyons Point,
  or near Crowley, moving northeast at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lafayette, Crowley, Scott, Rayne, Duson, Maurice, Morse, Mire,
  Indian Bayou, Lyons Point, Ridge, Estherwood and Milton.

This includes Interstate 10 in Louisiana between mile markers 81 and
96.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3000 9241 3016 9251 3036 9221 3010 9203
TIME...MOT...LOC 2212Z 241DEG 15KT 3012 9239 

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

Tingler
3 follow-up statements
290 
WWUS54 KLCH 172217
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
517 PM CDT Mon May 17 2021

LAC001-055-113-172300-
/O.CON.KLCH.SV.W.0090.000000T0000Z-210517T2300Z/
Lafayette LA-Acadia LA-Vermilion LA-
517 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTHWESTERN LAFAYETTE...SOUTHEASTERN ACADIA AND NORTH CENTRAL
VERMILION PARISHES...

At 517 PM CDT, a severe thunderstorm was located near Lyons Point, or
near Crowley, moving northeast at 30 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lafayette, Crowley, Scott, Rayne, Duson, Maurice, Mire, Lyons Point,
Indian Bayou, Ridge, Estherwood and Milton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3003 9239 3019 9246 3036 9221 3010 9203
TIME...MOT...LOC 2217Z 242DEG 24KT 3014 9234 

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

Tingler
185 
WWUS54 KLCH 172235
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
535 PM CDT Mon May 17 2021

LAC113-172244-
/O.CAN.KLCH.SV.W.0090.000000T0000Z-210517T2300Z/
Vermilion LA-
535 PM CDT Mon May 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL VERMILION PARISH
IS CANCELLED...

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

LAT...LON 3014 9220 3014 9226 3027 9235 3036 9221
      3014 9206 3012 9214
TIME...MOT...LOC 2234Z 230DEG 23KT 3026 9228 3016 9221 

$$

LAC001-055-172300-
/O.CON.KLCH.SV.W.0090.000000T0000Z-210517T2300Z/
Lafayette LA-Acadia LA-
535 PM CDT Mon May 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR WEST CENTRAL LAFAYETTE AND EAST CENTRAL ACADIA PARISHES...

At 534 PM CDT, severe thunderstorms were located along a line
extending from Rayne to near Ridge, moving northeast at 25 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Lafayette, Scott, Rayne, Duson, Mire and Ridge. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3014 9220 3014 9226 3027 9235 3036 9221
      3014 9206 3012 9214
TIME...MOT...LOC 2234Z 230DEG 23KT 3026 9228 3016 9221 

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

Tingler
425 
WWUS54 KLCH 172254
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
554 PM CDT Mon May 17 2021

LAC001-055-172304-
/O.EXP.KLCH.SV.W.0090.000000T0000Z-210517T2300Z/
Lafayette LA-Acadia LA-
554 PM CDT Mon May 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL LAFAYETTE AND
EAST CENTRAL ACADIA PARISHES WILL EXPIRE AT 600 PM CDT...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 3014 9220 3014 9226 3027 9235 3036 9221
      3014 9206 3012 9214
TIME...MOT...LOC 2254Z 241DEG 15KT 3030 9220 3020 9213 

$$

Tingler

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 2:45 AM CDTSpecial Marine WarningLCH90 min
May 17, 3:46 AM CDTSpecial Marine WarningLCH59 min
May 17, 4:16 AM CDTSpecial Marine WarningLCH89 min
May 17, 4:22 AM CDTSevere Thunderstorm WarningLCHCameron53 min
May 17, 4:39 AM CDTSpecial Marine WarningLCH66 min
May 17, 5:03 AM CDTTornado WarningLCHCameron27 min
May 17, 5:31 AM CDTSevere Thunderstorm WarningLCHCameron59 min
May 17, 5:43 AM CDTTornado WarningLCHCalcasieu32 min
May 17, 6:00 AM CDTSpecial Marine WarningLCH60 min
May 17, 6:32 AM CDTSevere Thunderstorm WarningLCHBeauregard, Calcasieu58 min
May 17, 6:56 AM CDTSpecial Marine WarningLCH64 min
May 17, 7:54 AM CDTSpecial Marine WarningLCH66 min
May 17, 7:56 AM CDTSpecial Marine WarningLCH64 min
May 17, 8:45 AM CDTTornado WarningLCHVernon30 min
May 17, 9:00 AM CDTSpecial Marine WarningLCH60 min
May 17, 9:04 AM CDTSpecial Weather StatementLCHBeauregard41 min
May 17, 9:20 AM CDTTornado WarningLCHAllen, Beauregard25 min
May 17, 9:34 AM CDTFlash Flood Warning Considerable damage threatLCHBeauregard, Vernon5 hr
May 17, 9:37 AM CDTFlash Flood Warning Considerable damage threatLCHBeauregard, Calcasieu5 hr
May 17, 9:37 AM CDTTornado WarningLCHCalcasieu38 min
May 17, 9:40 AM CDTFlash Flood WarningLCHCalcasieu, Cameron5 hr
May 17, 9:56 AM CDTSpecial Marine WarningLCH64 min
May 17, 10:03 AM CDTSpecial Marine WarningLCH57 min
May 17, 10:10 AM CDTFlash Flood WarningLCHCalcasieu4 hr
May 17, 10:16 AM CDTSevere Thunderstorm WarningLCHCalcasieu59 min
May 17, 10:30 AM CDTTornado WarningLCHCalcasieu30 min
May 17, 11:14 AM CDTSevere Thunderstorm WarningLCHCalcasieu, Jefferson Davis61 min
May 17, 11:16 AM CDTTornado WarningLCHCameron29 min
May 17, 11:18 AM CDTSpecial Marine WarningLCH17 min
May 17, 11:21 AM CDTFlash Flood WatchLCHAllen, Avoyelles, Beauregard, Cameron, Evangeline, Lafayette and 4 more5 days
May 17, 11:22 AM CDTTornado WarningLCHCalcasieu, Jefferson Davis23 min
May 17, 11:26 AM CDTFlash Flood WarningLCHAllen, Beauregard3 hr
May 17, 11:36 AM CDTFlash Flood WarningLCHCalcasieu3 hr
May 17, 11:42 AM CDTTornado WarningLCHCalcasieu, Jefferson Davis8 min
May 17, 11:51 AM CDTSpecial Marine WarningLCH54 min
May 17, 12:41 PM CDTFlash Flood Warning Considerable damage threatLCHCalcasieu, Jefferson Davis3 hr
May 17, 12:42 PM CDTSpecial Marine WarningLCH63 min
May 17, 1:11 PM CDTTornado WarningLCHCalcasieu, Jefferson Davis34 min
May 17, 1:40 PM CDTSpecial Marine WarningLCH65 min
May 17, 1:43 PM CDTFlash Flood Warning EmergencyCatastrophic damage threatLCHCalcasieu, Jefferson Davis6 hr
May 17, 1:49 PM CDTTornado WarningLCHCalcasieu, Jefferson Davis26 min
May 17, 2:04 PM CDTTornado WarningLCHAcadia, Lafayette, Vermilion26 min
May 17, 2:14 PM CDTTornado WarningLCHCalcasieu31 min
May 17, 2:19 PM CDTFlash Flood Warning Considerable damage threatLCHAllen, Beauregard, Calcasieu5 hr
May 17, 2:24 PM CDTFlash Flood WarningLCHBeauregard, Vernon3 hr
May 17, 2:27 PM CDTTornado Warning Tornado observedLCHAcadia33 min
May 17, 2:29 PM CDTRiver Flood WarningLCHAllen, Beauregard21 days
May 17, 2:35 PM CDTFlash Flood WarningLCHAllen, Jefferson Davis5 hr
May 17, 2:42 PM CDTSpecial Marine WarningLCH63 min
May 17, 2:52 PM CDTTornado WarningLCHSaint Landry38 min
May 17, 2:53 PM CDTTornado WarningLCHSaint Landry, Saint Martin37 min
May 17, 2:57 PM CDTTornado WarningLCHAcadia33 min
May 17, 3:28 PM CDTTornado WarningLCHSaint Landry, Saint Martin32 min
May 17, 3:29 PM CDTFlash Flood WarningLCHAcadia, Allen, Jefferson Davis5 hr
May 17, 3:29 PM CDTTornado WarningLCHAcadia, Jefferson Davis25 min
May 17, 3:30 PM CDTTornado WarningLCHAcadia16 min
May 17, 3:37 PM CDTTornado WarningLCHAcadia38 min
May 17, 3:40 PM CDTSpecial Marine WarningLCH65 min
May 17, 4:08 PM CDTTornado WarningLCHAcadia37 min
May 17, 4:12 PM CDTTornado WarningLCHSaint Landry33 min
May 17, 4:39 PM CDTSpecial Marine WarningLCH66 min
May 17, 4:44 PM CDTTornado WarningLCHAcadia, Saint Landry31 min
May 17, 5:16 PM CDTTornado WarningLCHLafayette, Saint Martin29 min
May 17, 5:39 PM CDTSpecial Marine WarningLCH66 min
May 17, 5:57 PM CDTSpecial Weather StatementLCHLafayette, Vermilion33 min
May 17, 6:01 PM CDTFlash Flood Warning Considerable damage threatLCHAcadia, Lafayette, Vermilion6 hr
May 17, 6:03 PM CDTFlash Flood WarningLCHLafayette, Saint Landry, Saint Martin7 hr
May 17, 6:32 PM CDTSpecial Weather StatementLCHLafayette, Vermilion43 min
May 17, 6:40 PM CDTSpecial Marine WarningLCH65 min
May 17, 6:40 PM CDTTornado WarningLCHSaint Landry, Saint Martin35 min
May 17, 6:50 PM CDTAreal Flood WarningLCHBeauregard, Calcasieu3 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 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; radar from the NEXRAD Level II archive.