Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 34, NWS Lake Charles, LA

April 10, 2021St. Mary Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 10, 2021, 11:14 AM CDT for St. Mary Parish, Louisiana. It was in force for 12 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 10, 2021, 11:14 AM CDT (16:14 UTC)
Expired
Apr 10, 2021, 11:26 AM CDT
In force
12 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County St. Mary Parish, LA

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 4.2 hours before the alert went out and 202 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 2021-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 2021-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -206 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
1 J/kg
Mixed-layer CIN
-499 J/kg
Mixed-layer LCL
1700 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
-206 m²/s²
0-3 km storm-relative helicity
-104 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

637 
WUUS54 KLCH 101614
SVRLCH
LAC101-101645-
/O.NEW.KLCH.SV.W.0034.210410T1614Z-210410T1645Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
1114 AM CDT Sat Apr 10 2021

The National Weather Service in Lake Charles has issued a

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

* Until 1145 AM CDT.

* At 1114 AM CDT, a severe thunderstorm was located 8 miles south of
  Bayou Vista, moving east at 35 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...
  Amelia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2962 9112 2961 9112 2961 9114 2959 9116
      2961 9118 2958 9122 2956 9122 2955 9124
      2955 9128 2953 9129 2951 9127 2948 9128
      2948 9131 2965 9132 2968 9110 2964 9111
      2963 9108
TIME...MOT...LOC 1614Z 265DEG 31KT 2957 9124 

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

13
1 follow-up statement
333 
WWUS54 KLCH 101626
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
1126 AM CDT Sat Apr 10 2021

LAC101-101636-
/O.CAN.KLCH.SV.W.0034.000000T0000Z-210410T1645Z/
St. Mary LA-
1126 AM CDT Sat Apr 10 2021

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

LAT...LON 2962 9112 2961 9112 2961 9114 2959 9116
      2961 9118 2958 9122 2956 9122 2955 9124
      2955 9128 2953 9129 2951 9127 2948 9128
      2948 9131 2965 9132 2968 9110 2964 9111
      2963 9108
TIME...MOT...LOC 1625Z 265DEG 31KT 2958 9112 

$$

13

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 9, 9:08 PM CDTSpecial Weather StatementLCHRapides82 min
Apr 9, 9:24 PM CDTSevere Thunderstorm WarningLCHRapides81 min
Apr 10, 12:28 AM CDTSevere Thunderstorm WarningLCHAvoyelles, Rapides47 min
Apr 10, 12:52 AM CDTSpecial Weather StatementLCHVernon38 min
Apr 10, 12:53 AM CDTTornado WarningLCHAvoyelles, Rapides22 min
Apr 10, 1:10 AM CDTTornado WarningLCHAvoyelles35 min
Apr 10, 1:13 AM CDTSevere Thunderstorm WarningLCHAvoyelles, Evangeline, Saint Landry47 min
Apr 10, 1:22 AM CDTTornado WarningLCHAvoyelles, Saint Landry23 min
Apr 10, 1:34 AM CDTSevere Thunderstorm WarningLCHSaint Landry41 min
Apr 10, 1:40 AM CDTTornado WarningLCHAvoyelles, Saint Landry18 min
Apr 10, 1:42 AM CDTTornado WarningLCHSaint Landry33 min
Apr 10, 2:11 AM CDTTornado WarningLCHSaint Landry34 min
Apr 10, 4:11 AM CDTSevere Thunderstorm WarningLCHBeauregard, Calcasieu49 min
Apr 10, 4:58 AM CDTSpecial Weather StatementLCHLafayette, Saint Martin, Vermilion62 min
Apr 10, 5:00 AM CDTSpecial Weather StatementLCHCalcasieu60 min
Apr 10, 6:01 AM CDTSevere Thunderstorm WarningLCHCalcasieu, Cameron, Jefferson Davis29 min
Apr 10, 6:05 AM CDTSpecial Weather StatementLCHIberia, St. Mary, Vermilion40 min
Apr 10, 6:51 AM CDTSpecial Marine WarningLCH54 min
Apr 10, 6:55 AM CDTSpecial Weather StatementLCHVermilion50 min
Apr 10, 10:44 AM CDTSevere Thunderstorm WarningLCHSt. Mary31 min
Apr 10, 11:56 AM CDTRiver 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.