Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 24, NWS Lake Charles, LA

April 8, 2021Saint Landry Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 8, 2021, 12:31 AM CDT for Saint Landry Parish, Louisiana. It was in force for 16 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 8, 2021, 12:31 AM CDT (05:31 UTC)
Expired: Apr 8, 2021, 12:47 AM CDT
In force: 16 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Saint Landry Parish, LA

The radar

The Ft Polk radar (KPOE), 131 km from the middle of the area, began a volume at 05:33 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 00:00Z, 5.5 hours before the alert went out and 143 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1905 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 549 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 204 m²/s²
0-3 km storm-relative helicity: 210 m²/s²
Significant tornado parameter: 2.0
Supercell composite: 12.6

Open this sounding in Storm Lab

The text

As transmitted.

052 
WUUS54 KLCH 080531
SVRLCH
LAC097-080600-
/O.NEW.KLCH.SV.W.0024.210408T0531Z-210408T0600Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
1231 AM CDT Thu Apr 8 2021

The National Weather Service in Lake Charles has issued a

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

* Until 100 AM CDT.

* At 1230 AM CDT, a severe thunderstorm was located near Leonville,
  moving east at 35 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Opelousas, Krotz Springs, Leonville, Melville, Port Barre,
  Washington and Grand Coteau.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3043 9204 3060 9211 3072 9175 3071 9173
      3067 9173 3066 9175 3063 9174 3062 9175
      3056 9176 3051 9173 3051 9175 3048 9176
      3045 9174 3045 9172 3044 9172
TIME...MOT...LOC 0530Z 255DEG 32KT 3051 9202 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
 
$$

25

1 follow-up statement

534 
WWUS54 KLCH 080547
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
1247 AM CDT Thu Apr 8 2021

LAC097-080557-
/O.CAN.KLCH.SV.W.0024.000000T0000Z-210408T0600Z/
St. Landry LA-
1247 AM CDT Thu Apr 8 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL ST. LANDRY PARISH
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.

LAT...LON 3043 9204 3060 9211 3072 9175 3071 9173
      3067 9173 3066 9175 3063 9174 3062 9175
      3056 9176 3051 9173 3051 9175 3048 9176
      3045 9174 3045 9172 3044 9172
TIME...MOT...LOC 0546Z 255DEG 32KT 3055 9185 

$$

25

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 7, 7:07 PM CDT	Special Weather Statement	LCH	Vernon	38 min
Apr 7, 7:53 PM CDT	Severe Thunderstorm Warning	LCH	Vernon	16 min
Apr 7, 8:17 PM CDT	Special Weather Statement	LCH	Vernon	43 min
Apr 7, 8:33 PM CDT	Special Weather Statement	LCH	Rapides	42 min
Apr 7, 9:01 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	44 min
Apr 7, 9:11 PM CDT	Tornado Warning	LCH	Avoyelles, Rapides	19 min
Apr 7, 9:33 PM CDT	Special Weather Statement	LCH	Allen, Beauregard, Evangeline	42 min
Apr 7, 9:37 PM CDT	Severe Thunderstorm Warning	LCH	Avoyelles	38 min
Apr 7, 9:44 PM CDT	Tornado Warning	LCH	Avoyelles	31 min
Apr 7, 10:11 PM CDT	Tornado Warning	LCH	Avoyelles	19 min
Apr 7, 11:39 PM CDT	Special Weather Statement	LCH	Saint Landry	51 min
Apr 8, 12:39 AM CDT	Special Weather Statement	LCH	Lafayette	36 min
Apr 8, 6:22 AM CDT	Dense Fog Advisory	LCH	Avoyelles, Rapides	3 hr

Nearby

Severe Thunderstorm Warnings in Louisiana, 2021 Every 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.