Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 122, NWS Lake Charles, LA

December 6, 2021Rapides Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at Dec 6, 2021, 10:40 AM CST for Rapides Parish, Louisiana. It was in force for 35 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: Dec 6, 2021, 10:40 AM CST (16:40 UTC)
Expired: Dec 6, 2021, 11:15 AM CST
In force: 35 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Rapides Parish, LA

The radar

The Ft Polk radar (KPOE), 36 km from the middle of the area, began a volume at 16:39 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 12:00Z, 4.7 hours before the alert went out and 150 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: 1185 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 7.2

Open this sounding in Storm Lab

The text

As transmitted.

055 
WUUS54 KLCH 061640
SVRLCH
LAC079-061715-
/O.NEW.KLCH.SV.W.0122.211206T1640Z-211206T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
1040 AM CST Mon Dec 6 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Northwestern Rapides Parish in central Louisiana...

* Until 1115 AM CST.

* At 1039 AM CST, severe thunderstorms were located along a line
  extending from 6 miles south of Montgomery to 7 miles northeast of
  Kurthwood, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Alexandria, Boyce, Alexandria International Airport, Lena, Ball,
  Tioga, Timber Trails, Flatwoods and Paradise.

This includes Interstate 49 between mile markers 88 and 108.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3149 9270 3150 9268 3145 9271 3145 9268
      3140 9269 3140 9267 3139 9266 3145 9233
      3124 9257 3135 9295 3137 9295 3137 9292
      3139 9291 3139 9289 3142 9287 3142 9285
      3143 9284 3144 9281 3152 9272
TIME...MOT...LOC 1639Z 275DEG 40KT 3158 9288 3142 9309 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Stigger/87

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 6, 3:00 AM CST	Small Craft Advisory	LCH		21 hr
Dec 6, 6:24 AM CST	Special Weather Statement	LCH	Vernon	36 min
Dec 6, 6:37 AM CST	Tornado Warning	LCH	Vernon	23 min
Dec 6, 7:01 AM CST	Special Weather Statement	LCH	Vernon	29 min
Dec 6, 7:10 AM CST	Tornado Warning	LCH	Rapides, Vernon	35 min
Dec 6, 8:09 AM CST	Tornado Warning	LCH	Rapides	15 min

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.