Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Lake Charles, LA

April 7, 2021Avoyelles Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 7, 2021, 9:37 PM CDT for Avoyelles Parish, Louisiana. It was in force for 38 min. 6 reports 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 7, 2021, 9:37 PM CDT (02:37 UTC)
Expired: Apr 7, 2021, 10:15 PM CDT
In force: 38 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Avoyelles Parish, LA

The radar

The Ft Polk radar (KPOE), 106 km from the middle of the area, began a volume at 02:36 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

Time	Report	Where	Remark
Apr 7, 9:52 PM CDT	TSTM WND DMG	1 S Marksville, LA	MINOR WIND RELATED DAMAGE TO BUILDINGS AND SIGNS ON THE SOUTHSIDE OF MARKSVILLE. DAMAGE WAS SEEN AT THE SONIC DRIVE-IN AS WELL AS THE AVOYELLES PARISH 911 OFFICE. THIS WAS POSSIBLY DUE TO A TORNADO.
Apr 7, 9:52 PM CDT	TSTM WND DMG	1 S Marksville, LA	MINOR WIND RELATED DAMAGE TO BUILDINGS AND SIGNS ON THE SOUTHSIDE OF MARKSVILLE. DAMAGE WAS SEEN AT THE SONIC DRIVE-IN AS WELL AS THE AVOYELLES PARISH 911 OFFICE. THIS WAS NOT A TORNADO.
Apr 7, 9:52 PM CDT	TORNADO	3 S Marksville, LA	AN EF1 TORNADO TOUCHED DOWN AT THE CHARTER SCHOOL,DAMAGING SOME OF THE EXTERIOR WALLS. SEVERAL ROOFS OF OUTSIDE BALLFIELDS WERE DESTROYED. MANY TREES WERE SNAPPED OR UPROOTED NEAR OLD RIVER ROAD EAST OF THE SCHOOL.
Apr 7, 9:54 PM CDT	TSTM WND DMG	3 S Marksville, LA	MINOR WIND RELATED DAMAGE AT THE AVOYELLES PUBLIC CHARTER SCHOOL LOCATED NEAR MANSURA. THIS WAS POSSIBLY DUE TO A TORNADO.
Apr 7, 10:16 PM CDT	TSTM WND DMG	2 Ese Bordelonville, LA	AN EF1 TORNADO TOUCHED DOWN ALONG HWY 451 AND PETELABORDE RD. ONE HOME LOST ITS ROOF. SEVERAL BARNS AND OUTBUILDINGS LOST ROOFS. SEVERAL TREES WERE SNAPPED OR UPROOTED.
Apr 7, 10:17 PM CDT	TSTM WND DMG	2 Se Bordelonville, LA	ROOF OFF OF A BUILDING ON PETE LABORDE RD NEAR BORDELONVILLE. THIS WAS POSSIBLY DUE TO A TORNADO.

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, 2.6 hours before the alert went out and 175 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.

519 
WUUS54 KLCH 080237
SVRLCH
LAC009-080315-
/O.NEW.KLCH.SV.W.0023.210408T0237Z-210408T0315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
937 PM CDT Wed Apr 7 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Central Avoyelles Parish in central Louisiana...

* Until 1015 PM CDT.

* At 937 PM CDT, a severe thunderstorm was located near Marksville,
  moving east at 40 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...
  Marksville, Simmesport, Moreauville, Bordelonville, Effie,
  Cottonport, Mansura, Hessmer, Brouillette, Big Bend, Lake Ophelia
  National Wildlife Refuge and Hamburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3126 9185 3127 9184 3123 9179 3120 9173
      3121 9170 3119 9168 3117 9168 3114 9172
      3110 9170 3105 9172 3097 9181 3103 9220
      3124 9223 3128 9201 3122 9199 3125 9195
      3122 9194 3124 9192 3128 9194 3129 9190
TIME...MOT...LOC 0237Z 272DEG 33KT 3111 9211 

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

24

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, 9:44 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, 12:31 AM CDT	Severe Thunderstorm Warning	LCH	Saint Landry	16 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.