Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 49, NWS Lake Charles, LA

April 16, 20215 parishes in Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 16, 2021, 4:33 AM CDT for 5 parishes in Louisiana. It was in force for 42 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
Apr 16, 2021, 4:33 AM CDT (09:33 UTC)
Expired
Apr 16, 2021, 5:15 AM CDT
In force
42 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

Counties Acadia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Saint Landry Parish, LA, Vermilion Parish, LA

The radar

The Lake Charles radar (KLCH), 110 km from the middle of the area, began a volume at 09:37 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

TimeReportWhereRemark
Apr 16, 5:15 AM CDTHAIL 1Maurice, LANICKEL TO QUARTER SIZE HAIL.

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 00:00Z, 9.6 hours before the alert went out and 108 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 00:00Z on 2021-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 2021-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 115 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
952 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
115 m²/s²
0-3 km storm-relative helicity
210 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

958 
WUUS54 KLCH 160933
SVRLCH
LAC001-053-055-097-113-161015-
/O.NEW.KLCH.SV.W.0049.210416T0933Z-210416T1015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
433 AM CDT Fri Apr 16 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Lafayette Parish in south central Louisiana...
  Southeastern Jefferson Davis Parish in southwestern Louisiana...
  Acadia Parish in southwestern Louisiana...
  Northern Vermilion Parish in southwestern Louisiana...
  South central St. Landry Parish in central Louisiana...

* Until 515 AM CDT.

* At 433 AM CDT, severe thunderstorms were located along a line
  extending from near Basile to near Mermentau, moving east at 50
  mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Lafayette, Opelousas, Crowley, Abbeville, Eunice, Jennings, Scott,
  Rayne, Carencro, Kaplan, Church Point, Lake Arthur, Iota, Gueydan,
  Leonville, Arnaudville, Mermentau, Evangeline, Broussard and
  Youngsville.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 64 and 107.
 Interstate 49 between mile markers 1 and 15.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and 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 3007 9272 3048 9260 3048 9192 3040 9193
      3041 9198 3037 9199 3036 9195 3032 9196
      3029 9195 3027 9195 3026 9197 3024 9196
      3021 9196 3020 9198 3019 9198 3018 9197
      2990 9201
TIME...MOT...LOC 0933Z 284DEG 45KT 3043 9257 3017 9262 

HAIL...0.88IN
WIND...60MPH
 
$$

Stigger/87
3 follow-up statements
772 
WWUS54 KLCH 160948
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
448 AM CDT Fri Apr 16 2021

LAC053-160957-
/O.CAN.KLCH.SV.W.0049.000000T0000Z-210416T1015Z/
Jefferson Davis LA-
448 AM CDT Fri Apr 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN JEFFERSON DAVIS
PARISH IS CANCELLED...

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

LAT...LON 3003 9256 3048 9245 3048 9192 3040 9193
      3041 9198 3037 9199 3036 9195 3032 9196
      3029 9195 3027 9195 3026 9197 3024 9196
      3021 9196 3020 9198 3019 9198 3018 9197
      2990 9201
TIME...MOT...LOC 0947Z 276DEG 41KT 3040 9239 3014 9244 

$$

LAC001-055-097-113-161015-
/O.CON.KLCH.SV.W.0049.000000T0000Z-210416T1015Z/
Lafayette LA-Acadia LA-Vermilion LA-St. Landry LA-
448 AM CDT Fri Apr 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR LAFAYETTE...ACADIA...NORTHEASTERN VERMILION AND SOUTH CENTRAL ST.
LANDRY PARISHES...

At 447 AM CDT, severe thunderstorms were located along a line
extending from Mowata to near Morse, moving east at 45 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Lafayette, Opelousas, Crowley, Abbeville, Eunice, Scott, Rayne,
Carencro, Kaplan, Church Point, Iota, Gueydan, Leonville,
Arnaudville, Broussard, Youngsville, Sunset, Erath, Delcambre and
Duson.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 74 and 107.
 Interstate 49 between mile markers 1 and 15.

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 3003 9256 3048 9245 3048 9192 3040 9193
      3041 9198 3037 9199 3036 9195 3032 9196
      3029 9195 3027 9195 3026 9197 3024 9196
      3021 9196 3020 9198 3019 9198 3018 9197
      2990 9201
TIME...MOT...LOC 0947Z 276DEG 41KT 3040 9239 3014 9244 

HAIL...0.88IN
WIND...60MPH
 
$$

Stigger/87
231 
WWUS54 KLCH 160955
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
455 AM CDT Fri Apr 16 2021

LAC001-055-097-113-161015-
/O.CON.KLCH.SV.W.0049.000000T0000Z-210416T1015Z/
Lafayette LA-Acadia LA-Vermilion LA-St. Landry LA-
455 AM CDT Fri Apr 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR LAFAYETTE...EASTERN ACADIA...NORTHEASTERN VERMILION AND SOUTH
CENTRAL ST. LANDRY PARISHES...

At 455 AM CDT, severe thunderstorms were located along a line
extending from near Richard to near Lyons Point, moving east at 50
mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Lafayette, Opelousas, Crowley, Abbeville, Scott, Rayne, Carencro,
Kaplan, Church Point, Leonville, Arnaudville, Broussard, Youngsville,
Sunset, Erath, Delcambre, Duson, Maurice, Grand Coteau and Cankton.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 82 and 107.
 Interstate 49 between mile markers 1 and 15.

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 3000 9243 3048 9233 3048 9192 3040 9193
      3041 9198 3037 9199 3036 9195 3032 9196
      3029 9195 3027 9195 3026 9197 3024 9196
      3021 9196 3020 9198 3019 9198 3018 9197
      2990 9201
TIME...MOT...LOC 0955Z 284DEG 45KT 3038 9230 3012 9235 

HAIL...0.88IN
WIND...60MPH
 
$$

Stigger/87
443 
WWUS54 KLCH 161000
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
500 AM CDT Fri Apr 16 2021

LAC001-055-097-113-161015-
/O.CON.KLCH.SV.W.0049.000000T0000Z-210416T1015Z/
Lafayette LA-Acadia LA-Vermilion LA-St. Landry LA-
500 AM CDT Fri Apr 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR LAFAYETTE...NORTHEASTERN ACADIA...NORTHEASTERN VERMILION AND
SOUTH CENTRAL ST. LANDRY PARISHES...

At 500 AM CDT, severe thunderstorms were located along a line
extending from near Cankton to near Indian Bayou, moving east at 60
mph.

HAZARD...70 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect considerable 
         tree damage. Wind damage is also likely to mobile homes, 
         roofs, and outbuildings.

Locations impacted include...
Lafayette, Opelousas, Abbeville, Scott, Rayne, Carencro, Kaplan,
Church Point, Leonville, Arnaudville, Broussard, Youngsville, Sunset,
Erath, Delcambre, Duson, Maurice, Grand Coteau, Cankton and Meaux.

This includes the following highways...
 Interstate 10 in Louisiana between mile markers 89 and 107.
 Interstate 49 between mile markers 1 and 15.

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 2997 9232 3048 9222 3048 9192 3040 9193
      3041 9198 3037 9199 3036 9195 3032 9196
      3029 9195 3027 9195 3026 9197 3024 9196
      3021 9196 3020 9198 3019 9198 3018 9197
      2990 9201
TIME...MOT...LOC 1000Z 284DEG 51KT 3034 9216 3008 9221 

HAIL...1.25IN
WIND...70MPH
 
$$

Stigger/87

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 11:57 PM CDTSevere Thunderstorm WarningLCHBeauregard48 min
Apr 16, 3:06 AM CDTSpecial Weather StatementLCHEvangeline24 min
Apr 16, 3:11 AM CDTSevere Thunderstorm WarningLCHBeauregard, Calcasieu34 min
Apr 16, 3:30 AM CDTSpecial Weather StatementLCHEvangeline45 min
Apr 16, 3:44 AM CDTSevere Thunderstorm WarningLCHAllen, Beauregard, Calcasieu, Jefferson Davis31 min
Apr 16, 4:12 AM CDTSevere Thunderstorm WarningLCHAcadia, Allen, Evangeline, Jefferson Davis33 min
Apr 16, 4:13 AM CDTSpecial Weather StatementLCHSaint Landry47 min
Apr 16, 5:11 AM CDTSevere Thunderstorm WarningLCHIberia, Lafayette, Saint Landry, Saint Martin, St. Mary, Vermilion64 min
Apr 16, 10:34 AM CDTRiver Flood WarningLCHLafayette, Saint Landry, Saint Martin57 hr
Apr 16, 4:22 PM CDTSmall Craft AdvisoryLCH35 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.