Alert archive / Louisiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 93, NWS Lake Charles, LA

May 19, 2021Calcasieu Parish, Cameron Parish, Jefferson Davis Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 19, 2021, 11:29 PM CDT for Calcasieu Parish, Cameron Parish, Jefferson Davis Parish, Louisiana. It was in force for 17 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: May 19, 2021, 11:29 PM CDT (04:29 UTC)
Expired: May 19, 2021, 11:46 PM CDT
In force: 17 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Calcasieu Parish, LA, Cameron Parish, LA, Jefferson Davis Parish, LA

The radar

The Lake Charles radar (KLCH), 24 km from the middle of the area, began a volume at 04:32 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, 4.5 hours before the alert went out and 23 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: 708 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 567 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 217 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.8

Open this sounding in Storm Lab

The text

As transmitted.

800 
WUUS54 KLCH 200429
SVRLCH
LAC019-023-053-200500-
/O.NEW.KLCH.SV.W.0093.210520T0429Z-210520T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
1129 PM CDT Wed May 19 2021

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cameron Parish in southwestern Louisiana...
  Central Jefferson Davis Parish in southwestern Louisiana...
  Southeastern Calcasieu Parish in southwestern Louisiana...

* Until midnight CDT.

* At 1128 PM CDT, severe thunderstorms were located along a line
  extending from near Lacassine National Wildlife Refuge to near
  Lowry, moving north at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Welsh, Iowa, Fenton, Lacassine National Wildlife Refuge, Hayes,
  Moss Bluff, Lebleu Settlement, Pine Island, Thornwell, Lowry,
  Holmwood, Bell City, Roanoke and Lacassine.

This includes Interstate 10 in Louisiana between mile markers 36 and
59.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3036 9319 3036 9273 2991 9275 2992 9301
TIME...MOT...LOC 0428Z 165DEG 36KT 2997 9299 2996 9278 

HAIL...<.75IN
WIND...60MPH
 
$$

Jones

1 follow-up statement

819 
WWUS54 KLCH 200446
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
1146 PM CDT Wed May 19 2021

LAC019-023-053-200456-
/O.CAN.KLCH.SV.W.0093.000000T0000Z-210520T0500Z/
Cameron LA-Jefferson Davis LA-Calcasieu LA-
1146 PM CDT Wed May 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CAMERON...CENTRAL
JEFFERSON DAVIS AND SOUTHEASTERN CALCASIEU PARISHES IS CANCELLED...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with these thunderstorms.

LAT...LON 3036 9319 3036 9273 2991 9275 2992 9301
TIME...MOT...LOC 0446Z 165DEG 36KT 3015 9304 3014 9283 

$$

Jones

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 10:00 PM CDT	Flash Flood Warning	LCH	Cameron	3 hr
May 19, 10:27 PM CDT	Special Marine Warning	LCH		33 min
May 19, 10:29 PM CDT	Special Marine Warning	LCH		31 min
May 19, 10:54 PM CDT	Severe Thunderstorm Warning	LCH	Calcasieu, Cameron, Jefferson Davis	36 min
May 19, 10:56 PM CDT	Special Marine Warning	LCH		34 min
May 20, 3:55 AM CDT	Coastal Flood Advisory	LCH	Cameron	18 hr
May 20, 9:27 AM CDT	River Flood Warning	LCH	Calcasieu, Cameron	21 days
May 20, 4:04 PM CDT	Flash Flood Warning	LCH	Acadia, Allen, Jefferson Davis, Vermilion	5 hr
May 20, 5:16 PM CDT	Flash Flood Warning	LCH	Beauregard, Calcasieu, Cameron, Jefferson Davis	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.