Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 35, NWS Lake Charles, LA

April 13, 2021Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 13, 2021, 7:10 PM CDT for Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 20 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
Apr 13, 2021, 7:10 PM CDT (00:10 UTC)
Expired
Apr 13, 2021, 7:30 PM CDT
In force
20 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Saint Martin Parish, LA, St. Mary Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.2 hours before the alert went out and 153 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, Slidell Radar S, LA at 00:00Z on 2021-04-14Temperature 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, Slidell Radar S, LA at 00:00Z on 2021-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 205 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
1359 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
205 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

697 
WUUS54 KLCH 140010
SVRLCH
LAC099-101-140045-
/O.NEW.KLCH.SV.W.0035.210414T0010Z-210414T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
710 PM CDT Tue Apr 13 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  East central St. Mary Parish in south central Louisiana...
  Southeastern St. Martin Parish in south central Louisiana...

* Until 745 PM CDT.

* At 710 PM CDT, a severe thunderstorm was located near Berwick,
  moving east at 45 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...
  Morgan City, Patterson, Berwick, Stephensville, Bayou Vista, Belle
  River, Amelia and Patterson Memorial Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2961 9112 2961 9114 2959 9116 2961 9118
      2959 9121 2965 9138 2980 9132 2992 9129
      2990 9121 2986 9120 2985 9118 2983 9113
      2980 9109 2977 9110 2975 9109 2974 9111
      2969 9110 2964 9111 2962 9109
TIME...MOT...LOC 0010Z 281DEG 41KT 2976 9125 

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

Warthen
2 follow-up statements
818 
WWUS54 KLCH 140019
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
719 PM CDT Tue Apr 13 2021

LAC099-101-140045-
/O.CON.KLCH.SV.W.0035.000000T0000Z-210414T0045Z/
St. Mary LA-St. Martin LA-
719 PM CDT Tue Apr 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR EAST CENTRAL ST. MARY AND SOUTHEASTERN ST. MARTIN PARISHES...

At 718 PM CDT, a severe thunderstorm was located over Stephensville,
moving east at 45 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...
Morgan City, Berwick, Stephensville, Bayou Vista and Amelia. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2961 9112 2961 9114 2959 9116 2961 9118
      2959 9121 2962 9130 2975 9127 2985 9123
      2986 9120 2985 9118 2983 9113 2980 9109
      2977 9110 2975 9109 2974 9111 2969 9110
      2964 9111 2962 9109
TIME...MOT...LOC 0018Z 281DEG 41KT 2974 9114 

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

Warthen
207 
WWUS54 KLCH 140030
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
730 PM CDT Tue Apr 13 2021

LAC099-101-140040-
/O.CAN.KLCH.SV.W.0035.000000T0000Z-210414T0045Z/
St. Mary LA-St. Martin LA-
730 PM CDT Tue Apr 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ST. MARY AND
SOUTHEASTERN ST. MARTIN PARISHES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Lake Charles.

LAT...LON 2961 9112 2961 9114 2959 9116 2961 9118
      2959 9121 2962 9130 2975 9127 2985 9123
      2986 9120 2985 9118 2983 9113 2980 9109
      2977 9110 2975 9109 2974 9111 2969 9110
      2964 9111 2962 9109
TIME...MOT...LOC 0028Z 281DEG 41KT 2971 9098 

$$

Warthen

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 8:30 PM CDTSmall Craft AdvisoryLCH15 hr
Apr 13, 9:58 PM CDTRiver Flood WarningLCHAcadia, Evangeline, Saint Landry7 days
Apr 14, 1:29 AM CDTCoastal Flood WatchLCHCameron4 hr
Apr 14, 4:42 AM CDTSpecial Weather StatementLCHAcadia, Jefferson Davis33 min
Apr 14, 5:43 AM CDTCoastal Flood WarningLCHCameron5 hr
Apr 14, 6:28 AM CDTSevere Thunderstorm WarningLCHBeauregard, Vernon47 min
Apr 14, 7:00 AM CDTSevere Thunderstorm WarningLCHAcadia, Lafayette, Saint Landry, Saint Martin30 min
Apr 14, 7:11 AM CDTSpecial Weather StatementLCHBeauregard64 min
Apr 14, 7:16 AM CDTSpecial Weather StatementLCHAvoyelles29 min
Apr 14, 7:36 AM CDTSevere Thunderstorm WarningLCHCalcasieu54 min
Apr 14, 7:52 AM CDTSpecial Weather StatementLCHSaint Landry23 min
Apr 14, 7:57 AM CDTSevere Thunderstorm WarningLCHAllen, Beauregard, Calcasieu, Cameron, Jefferson Davis63 min
Apr 14, 8:14 AM CDTSpecial Weather StatementLCHSt. Mary31 min
Apr 14, 8:32 AM CDTSevere Thunderstorm WarningLCHSaint Martin, St. Mary32 min
Apr 14, 9:00 AM CDTSevere Thunderstorm WarningLCHCalcasieu, Cameron, Jefferson Davis45 min
Apr 14, 9:34 AM CDTRiver Flood WarningLCHLafayette, Saint Martin, Vermilion6 days
Apr 14, 9:34 AM CDTRiver Flood WarningLCHCalcasieu6 days
Apr 14, 9:34 AM CDTRiver Flood WarningLCHLafayette, Saint Landry, Saint Martin36 hr
Apr 14, 9:34 AM CDTRiver Flood WarningLCHAcadia, Jefferson Davis, Vermilion21 days
Apr 14, 9:34 AM CDTRiver Flood WarningLCHRapides21 days
Apr 14, 9:34 AM CDTRiver Flood WarningLCHAcadia, Allen, Evangeline, Jefferson Davis21 days
Apr 14, 9:42 AM CDTSpecial Weather StatementLCHVermilion48 min
Apr 14, 9:49 AM CDTSpecial Weather StatementLCHVermilion41 min
Apr 14, 10:36 AM CDTSpecial Weather StatementLCHVermilion24 min
Apr 14, 11:07 AM CDTSpecial Marine WarningLCH53 min
Apr 14, 4:30 PM CDTSpecial Weather StatementLCHCalcasieu45 min
Apr 14, 4:40 PM CDTRiver Flood WarningLCHBeauregard, Calcasieu38 hr
Apr 14, 4:40 PM CDTRiver Flood WarningLCHCalcasieu8 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.