Alert archive / Louisiana / Special Weather Statements in 2021

Special Weather Statement, NWS Lake Charles, LA

July 31, 2021Saint Landry Parish, Louisiana

NWS Lake Charles, LA issued this special weather statement at Jul 31, 2021, 7:10 PM CDT for Saint Landry Parish, Louisiana. It was in force for 50 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
Jul 31, 2021, 7:10 PM CDT (00:10 UTC)
Expired
Jul 31, 2021, 8:00 PM CDT
In force
50 min
Issued by
NWS Lake Charles, LA

County Saint Landry Parish, LA

The radar

The Ft Polk radar (KPOE), 100 km from the middle of the area, began a volume at 00:07 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, 0.2 hours before the alert went out and 120 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 00:00Z on 2021-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1899 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 00:00Z on 2021-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.1939Sfc1 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
1899 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1243 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

336 
WWUS84 KLCH 010010
SPSLCH

Special Weather Statement
National Weather Service Lake Charles LA
710 PM CDT Sat Jul 31 2021
 
LAZ032-033-010100-
St. Landry LA-Evangeline LA-
710 PM CDT Sat Jul 31 2021

...SPECIAL WEATHER STATEMENT...

At 710 PM CDT, Doppler radar was tracking a strong thunderstorm near
Port Barre, or 8 miles southwest of Palmetto, moving west at 25 mph.

Pea size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Opelousas, Ville Platte, Leonville, Melville, Palmetto, Port Barre,
Washington, Chataignier, Prairie Ronde, Indian Lake, Savoy, Chicot
State Park, Lawtell, Whiteville, Swords, Grand Prairie, Lebeau and
St. Landry.

This includes Interstate 49 between mile markers 15 and 45.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3044 9179 3047 9224 3048 9225 3048 9233
      3088 9229 3087 9224 3085 9224 3085 9218
      3073 9176
TIME...MOT...LOC 0010Z 096DEG 21KT 3061 9197 

$$

K. Kuyper

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 7:42 AM CDTSpecial Marine WarningLCH33 min

Nearby

Special Weather Statements in Louisiana, 2021Every special weather statement 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.