Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 29, NWS Lake Charles, LA

April 10, 2021Saint Landry Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 10, 2021, 1:34 AM CDT for Saint Landry Parish, Louisiana. It was in force for 41 min. 1 report 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 10, 2021, 1:34 AM CDT (06:34 UTC)
Expired: Apr 10, 2021, 2:15 AM CDT
In force: 41 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

County Saint Landry Parish, LA

The radar

The Ft Polk radar (KPOE), 112 km from the middle of the area, began a volume at 06:34 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 10, 2:06 AM CDT	TORNADO 3	5 Sw Palmetto, LA	* 1 FATAL, 7 INJ * A STRONG TORNADO TOUCHED DOWN ON BOLDEN ROAD, DESTROYING SEVERAL HOMES. SINGLE WIDE MOBILE HOME THAT WAS TIED DOWN ROLLED NUMEROUS TIMES OVER 320 YARDS. ONE MAN DIED IN THIS HOME. DOUBLE WIDE MOBILE HOME NEXT DOOR ROLLED OVER 100 YARDS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 9, 10:25 PM CDT	Severe Thunderstorm Watch	SPC	6 hr
Apr 10, 12:16 AM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 6.6 hours before the alert went out and 121 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: 2773 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 733 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 149 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

As transmitted.

987 
WUUS54 KLCH 100634
SVRLCH
LAC097-100715-
/O.NEW.KLCH.SV.W.0029.210410T0634Z-210410T0715Z/

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

The National Weather Service in Lake Charles has issued a

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

* Until 215 AM CDT.

* At 134 AM CDT, a severe thunderstorm was located over Lawtell, or 8
  miles west of Opelousas, moving northeast at 30 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...
  Opelousas, Krotz Springs, Palmetto, Port Barre, Washington,
  Lawtell, Swords and Prairie Ronde.

This includes Interstate 49 between mile markers 16 and 30.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect until 700 AM CDT for central and
southwestern Louisiana.

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

&&

LAT...LON 3051 9174 3045 9224 3048 9224 3048 9227
      3054 9229 3054 9226 3057 9226 3057 9221
      3061 9221 3080 9184 3060 9175 3056 9176
      3051 9173
TIME...MOT...LOC 0634Z 247DEG 28KT 3053 9222 

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

24

1 follow-up statement

902 
WWUS54 KLCH 100712
SVSLCH

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

LAC097-100721-
/O.EXP.KLCH.SV.W.0029.000000T0000Z-210410T0715Z/
St. Landry LA-
212 AM CDT Sat Apr 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ST. LANDRY PARISH WILL
EXPIRE AT 215 AM CDT...
        
The storm which prompted the warning is moving out of the area.
Therefore, the warning will be allowed to expire.

A Tornado Watch remains in effect until 700 AM CDT for central and
southwestern Louisiana.

Remember, a Tornado Warning still remains in effect for portions of 
Saint Landry Parish until 245 AM.

LAT...LON 3051 9174 3045 9224 3048 9224 3048 9227
      3054 9229 3054 9226 3057 9226 3057 9221
      3061 9221 3080 9184 3060 9175 3056 9176
      3051 9173
TIME...MOT...LOC 0711Z 247DEG 28KT 3064 9193 

$$

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 9:08 PM CDT	Special Weather Statement	LCH	Rapides	82 min
Apr 9, 9:24 PM CDT	Severe Thunderstorm Warning	LCH	Rapides	81 min
Apr 10, 12:28 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Rapides	47 min
Apr 10, 12:52 AM CDT	Special Weather Statement	LCH	Vernon	38 min
Apr 10, 12:53 AM CDT	Tornado Warning	LCH	Avoyelles, Rapides	22 min
Apr 10, 1:10 AM CDT	Tornado Warning	LCH	Avoyelles	35 min
Apr 10, 1:13 AM CDT	Severe Thunderstorm Warning	LCH	Avoyelles, Evangeline, Saint Landry	47 min
Apr 10, 1:22 AM CDT	Tornado Warning	LCH	Avoyelles, Saint Landry	23 min
Apr 10, 1:40 AM CDT	Tornado Warning	LCH	Avoyelles, Saint Landry	18 min
Apr 10, 1:42 AM CDT	Tornado Warning	LCH	Saint Landry	33 min
Apr 10, 2:11 AM CDT	Tornado Warning	LCH	Saint Landry	34 min
Apr 10, 4:11 AM CDT	Severe Thunderstorm Warning	LCH	Beauregard, Calcasieu	49 min
Apr 10, 4:58 AM CDT	Special Weather Statement	LCH	Lafayette, Saint Martin, Vermilion	62 min
Apr 10, 5:00 AM CDT	Special Weather Statement	LCH	Calcasieu	60 min
Apr 10, 6:01 AM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron, Jefferson Davis	29 min
Apr 10, 6:05 AM CDT	Special Weather Statement	LCH	Iberia, St. Mary, Vermilion	40 min
Apr 10, 6:51 AM CDT	Special Marine Warning	LCH		54 min
Apr 10, 6:55 AM CDT	Special Weather Statement	LCH	Vermilion	50 min
Apr 10, 10:44 AM CDT	Severe Thunderstorm Warning	LCH	St. Mary	31 min
Apr 10, 11:14 AM CDT	Severe Thunderstorm Warning	LCH	St. Mary	12 min
Apr 10, 11:56 AM CDT	River Flood Warning	LCH	Beauregard, Calcasieu	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.