Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 40, NWS Lake Charles, LA

April 14, 2021Saint Martin Parish, St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 14, 2021, 8:32 AM CDT for Saint Martin Parish, St. Mary Parish, Louisiana. It was in force for 32 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 14, 2021, 8:32 AM CDT (13:32 UTC)
Expired
Apr 14, 2021, 9:04 AM CDT
In force
32 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

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

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.5 hours before the alert went out and 167 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 12:00Z 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 12:00Z on 2021-04-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1255 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
133 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

070 
WUUS54 KLCH 141332
SVRLCH
LAC099-101-141415-
/O.NEW.KLCH.SV.W.0040.210414T1332Z-210414T1415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
832 AM CDT Wed Apr 14 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 915 AM CDT.

* At 831 AM CDT, a severe thunderstorm was located over Ellerslie, or
  7 miles north of Burns Point, moving east at 30 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Morgan City, Franklin, Patterson, Berwick, Stephensville, Bayou
  Vista, Ellerslie, Amelia, Patterson Memorial Airport, Bayou Geneve
  and Centerville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2959 9116 2961 9118 2958 9122 2956 9122
      2955 9125 2957 9143 2963 9140 2962 9142
      2958 9143 2959 9154 2963 9155 2964 9157
      2977 9157 2982 9110 2975 9109 2974 9111
      2969 9110 2964 9111 2963 9108
TIME...MOT...LOC 1331Z 272DEG 24KT 2968 9150 

HAIL...1.00IN
WIND...<50MPH
 
$$

25
1 follow-up statement
426 
WWUS54 KLCH 141404
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
904 AM CDT Wed Apr 14 2021

LAC099-101-141414-
/O.CAN.KLCH.SV.W.0040.000000T0000Z-210414T1415Z/
St. Mary LA-St. Martin LA-
904 AM CDT Wed Apr 14 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ST. MARY AND
SOUTHEASTERN ST. MARTIN PARISHES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However small hail is
still possible with this thunderstorm.

LAT...LON 2959 9116 2961 9118 2958 9122 2956 9122
      2955 9125 2957 9143 2963 9140 2962 9142
      2958 9143 2959 9154 2963 9155 2964 9157
      2977 9157 2982 9110 2975 9109 2974 9111
      2969 9110 2964 9111 2963 9108
TIME...MOT...LOC 1402Z 272DEG 24KT 2967 9124 

$$

25

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 13, 7:10 PM CDTSevere Thunderstorm WarningLCHSaint Martin, St. Mary20 min
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, 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.