Alert archive / Louisiana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 13, NWS Lake Charles, LA

April 3, 2018Rapides Parish, Vernon Parish, Louisiana; Newton County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 3, 2018, 6:48 PM CDT for Rapides Parish, Vernon Parish, Louisiana; Newton County, Texas. It was in force for 57 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 3, 2018, 6:48 PM CDT (23:48 UTC)
Expired: Apr 3, 2018, 7:45 PM CDT
In force: 57 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Rapides Parish, LA, Vernon Parish, LA, Newton County, TX

The radar

The Ft Polk radar (KPOE), 28 km from the middle of the area, began a volume at 23:49 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 3, 7:44 PM CDT	TSTM WND DMG	Pitkin, LA	VERNON SHERIFFS DEPT REPORTS TREE DOWN.

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 3, 5:51 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.8 hours before the alert went out and 143 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: 321 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 684 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 227 m²/s²
0-3 km storm-relative helicity: 469 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted.

420 
WUUS54 KLCH 032348
SVRLCH
LAC079-115-TXC351-040045-
/O.NEW.KLCH.SV.W.0013.180403T2348Z-180404T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lake Charles LA
648 PM CDT TUE APR 3 2018

The National Weather Service in Lake Charles has issued a

* Severe Thunderstorm Warning for...
  Rapides Parish in central Louisiana...
  Vernon Parish in west central Louisiana...
  Northeastern Newton County in southeastern Texas...

* Until 745 PM CDT

* At 647 PM CDT, a line of severe thunderstorms was located near 
  Leesville, moving east at 35 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

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

* Locations impacted include...
  Alexandria, Pineville, Leesville, Rosepine, Boyce, Fort Polk,
  Alexandria International Airport, Slagle, Hineston, Lena, Pitkin,
  Burkeville, Deridder, Ball, New Llano, Tioga, Timber Trails,
  Hutton, Esler Regional Airport and Flatwoods.

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 3139 9266 3148 9221 3147 9216
      3142 9215 3088 9283 3089 9374 3110 9361
      3137 9313 3135 9295 3137 9295 3137 9292
      3139 9291 3152 9272
TIME...MOT...LOC 2347Z 265DEG 31KT 3118 9322 

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

RACKLEY

1 follow-up statement

562 
WWUS54 KLCH 040017
SVSLCH

Severe Weather Statement
National Weather Service Lake Charles LA
717 PM CDT TUE APR 3 2018

TXC351-040025-
/O.CAN.KLCH.SV.W.0013.000000T0000Z-180404T0045Z/
Newton TX-
717 PM CDT TUE APR 3 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NEWTON COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until midnight CDT for
central, southwestern and west central Louisiana...and southeastern
Texas.

LAT...LON 3149 9270 3150 9268 3145 9271 3145 9268
      3140 9269 3139 9266 3148 9221 3147 9216
      3142 9215 3088 9283 3089 9356 3103 9347
      3121 9341 3137 9314 3135 9295 3137 9295
      3137 9292 3139 9291 3139 9289 3152 9272
TIME...MOT...LOC 0015Z 265DEG 31KT 3120 9293 

$$

LAC079-115-040045-
/O.CON.KLCH.SV.W.0013.000000T0000Z-180404T0045Z/
Rapides LA-Vernon LA-
717 PM CDT TUE APR 3 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR RAPIDES AND VERNON PARISHES...

At 715 PM CDT, a severe thunderstorm was located over Lacamp, or 10
miles west of Hineston, moving east at 35 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

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

Locations impacted include...
Alexandria, Pineville, Leesville, Rosepine, Boyce, Fort Polk,
Alexandria International Airport, Slagle, Hineston, Lena, Pitkin,
Deridder, Ball, New Llano, Tioga, Timber Trails, Hutton, Esler
Regional Airport, Flatwoods and Otis.

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 3139 9266 3148 9221 3147 9216
      3142 9215 3088 9283 3089 9356 3103 9347
      3121 9341 3137 9314 3135 9295 3137 9295
      3137 9292 3139 9291 3139 9289 3152 9272
TIME...MOT...LOC 0015Z 265DEG 31KT 3120 9293 

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

RACKLEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 4:47 AM CDT	Small Craft Advisory	LCH		41 hr
Apr 3, 4:47 AM CDT	Small Craft Advisory for Winds	LCH		34 hr
Apr 3, 5:21 PM CDT	River Flood Warning	LCH	Calcasieu	24 hr
Apr 3, 5:38 PM CDT	Severe Thunderstorm Warning	LCH	Rapides, Vernon	67 min
Apr 3, 6:09 PM CDT	Special Weather Statement	LCH	Jasper	51 min
Apr 3, 6:15 PM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton	45 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2018 Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning in 2018

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.