Alert archive / Louisiana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 55, NWS Lake Charles, LA

May 23, 2013Vernon Parish, Louisiana

NWS Lake Charles, LA issued this severe thunderstorm warning at May 23, 2013, 5:15 PM CDT for Vernon Parish, Louisiana. It was in force for 45 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 23, 2013, 5:15 PM CDT (22:15 UTC)
Expired: May 23, 2013, 6:00 PM CDT
In force: 45 min
Issued by: NWS Lake Charles, LA
Area: Storm-based polygon

County Vernon Parish, LA

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.3 hours before the alert went out and 96 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: 2552 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 597 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

768 
WUUS54 KLCH 232215
SVRLCH
LAC115-232300-
/O.NEW.KLCH.SV.W.0055.130523T2215Z-130523T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LAKE CHARLES LA
515 PM CDT THU MAY 23 2013

THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL VERNON PARISH IN WEST CENTRAL LOUISIANA...
  THIS INCLUDES...ROSEPINE...FORT POLK...

* UNTIL 600 PM CDT

* AT 515 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH...OVER FORT POLK...MOVING EAST
  AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL SOUTHERN VERNON PARISH AT 530 PM CDT

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND HEAVY RAIN. STAY INDOORS...
AWAY FROM WINDOWS.

&&

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE AT
337-477-5285 EXTENSION 1.

LAT...LON 3101 9307 3092 9309 3090 9331 3108 9330
TIME...MOT...LOC 2215Z 274DEG 9KT 3100 9319

$$

2 follow-up statements

281 
WWUS54 KLCH 232237
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
537 PM CDT THU MAY 23 2013

LAC115-232300-
/O.CON.KLCH.SV.W.0055.000000T0000Z-130523T2300Z/
VERNON LA-
537 PM CDT THU MAY 23 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM CDT
FOR SOUTH CENTRAL VERNON PARISH...

AT 526 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM ON RADAR CAPABLE OF PRODUCING QUARTER SIZE HAIL. 
THIS STORM WAS LOCATED NEAR FORT POLK..MOVING EAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL SOUTHERN VERNON PARISH AT 550 PM CDT

LAT...LON 3101 9307 3092 9309 3090 9331 3108 9330
TIME...MOT...LOC 2236Z 274DEG 9KT 3098 9319

$$

393 
WWUS54 KLCH 232305
SVSLCH

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
605 PM CDT THU MAY 23 2013

LAC115-232309-
/O.EXP.KLCH.SV.W.0055.000000T0000Z-130523T2300Z/
VERNON LA-
605 PM CDT THU MAY 23 2013

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL VERNON PARISH
WILL EXPIRE AT 600 PM CDT...

LAT...LON 3101 9307 3092 9309 3090 9331 3108 9330
TIME...MOT...LOC 2259Z 274DEG 9KT 3098 9312

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at May 23, 3:17 PM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, May 23, 3:17 PM CDT, 1 hour 58 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LAKE CHARLES LA
317 PM CDT THU MAY 23 2013

.DISCUSSION...
CURRENT CONDITIONS FOR THE FORECAST AREA ARE PARTLY CLOUDY SKIES
WITH SOUTHEASTERLY WINDS THROUGHOUT. NOTHING SIGNIFICANT DISPLAYED
ON RADAR, WITH ISOLATED SHOWERS IN THE SOUTHWEST PORTION OF THE
STATE. THIS MORNING'S SOUNDING FEATURED DRY AIR ALOFT, AND
MOISTURE BELOW. A VEERING WIND PROFILE, IDENTIFIED BY CLOCKWISE
WINDS, EXISTS IN THE LOWER LEVELS.

HIGH PRESSURE ASSOCIATED WITH SFC RIDGING ACROSS THE EASTERN
PLAINS WILL PUSH A WEAK BACKDOOR COLD FRONT SOUTH INTO THE
FORECAST AREA EARLY FRIDAY. A CHANCE OF SHOWERS IS POSSIBLE WITH
THIS FRONT IF DAYTIME HEATING IS SUFFICIENT DURING THE AFTERNOON,
PAIRED WITH THE DRIER AIR EXISTING IN THE UPPER LEVELS. BEHIND THE
FRONT, SLIGHTLY COOLER TEMPERATURES AND LOWER HUMIDITY VALUES WILL
BE FELT, BUT MAINLY ACROSS THE NORTHWEST HALF OF THE CWA.

FOLLOWING THE GFS MODEL GUIDANCE, MEMORIAL DAY, AS WELL AS THE
REST OF EARLY NEXT WEEK, APPEARS TO BE WARM AND DRY AS A RESULT OF
UPPER LEVEL RIDING BUILDING OVER EASTERN TEXAS INTO WESTERN
LOUISIANA.

STACKHOUSE

&&

.MARINE...FAIRLY TRANQUIL MARINE CONDITIONS ARE EXPECTED THROUGH
THE WEEKEND, HOWEVER INTO THE MIDDLE OF THE COMING WEEK LOW
PRESSURE WILL DEVELOP OVER THE PLAINS WITH THE PRESSURE GRADIENT
TIGHTENING LOCALLY. THIS WILL INCREASE THE SOUTHEAST FLOW TO NEAR
20 KTS BY WED.

&&

.PRELIMINARY POINT TEMPS/POPS...
KLCH  72  89  69  87  67 /  10  20  10  10  10
KBPT  73  89  70  86  69 /  10  20  10  10  10
KAEX  70  87  62  87  64 /  10  20  10  20  10
KLFT  70  90  68  88  66 /  10  20  10  10  10

&&

.LCH WATCHES/WARNINGS/ADVISORIES...
LA...NONE.
TX...NONE.
GM...NONE.
&&

Hazardous weather outlook, May 23, 4:28 AM CDT, 12 hours 47 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
428 AM CDT THU MAY 23 2013

GMZ430-432-435-LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-
216-259>262-241100-
SABINE LAKE-CALCASIEU LAKE-VERMILION BAY-VERNON-RAPIDES-AVOYELLES-
BEAUREGARD-ALLEN-EVANGELINE-ST. LANDRY-CALCASIEU-JEFFERSON DAVIS-
ACADIA-LAFAYETTE-UPPER ST. MARTIN-VERMILION-IBERIA-ST. MARY-
LOWER ST. MARTIN-WEST CAMERON-EAST CAMERON-TYLER-HARDIN-JEFFERSON-
ORANGE-NORTHERN JASPER-NORTHERN NEWTON-SOUTHERN JASPER-
SOUTHERN NEWTON-
428 AM CDT THU MAY 23 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST
GULF OF MEXICO...CENTRAL LOUISIANA...SOUTH CENTRAL LOUISIANA...
SOUTHWEST LOUISIANA...WEST CENTRAL LOUISIANA AND SOUTHEAST TEXAS.

.DAY ONE...TODAY AND TONIGHT

PATCHY FOG WITH ISOLATED LOCATIONS HAVING VISIBILITIES BELOW 1/4 OF
A MILE WILL OCCUR UNTIL MID MORNING. OTHERWISE...NO HAZARDOUS WEATHER IS
EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

GMZ450-452-455-470-472-475-241100-
COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM-
COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM-
COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY
LA OUT 20 NM-
WATERS FROM CAMERON LA TO HIGH ISLAND TX FROM 20 TO 60 NM-
WATERS FROM  INTRACOASTAL CITY TO CAMERON LA FROM 20 TO 60 NM-
WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA FROM
20 TO 60 NM-
428 AM CDT THU MAY 23 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST
GULF OF MEXICO.

.DAY ONE...TODAY AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

RUA

In the hours before

Local storm report, May 23, 2:08 PM CDT, 3 hours 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
208 PM CDT THU MAY 23 2013

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1245 PM     TSTM WND GST     AMELIA                  29.66N 91.11W
05/22/2013  M115 MPH         ST. MARY           LA   PUBLIC

            REPORT OF WIND GUSTS TO 115 MPH AS PERSONNEL EVACUATED
            TOWER. AN AWOS AT HELIPORT REPORTED 44 MPH BEFORE
            FAILING.

&&

MOGGED

Special weather statement, May 23, 4:01 PM CDT, 1 hour 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LAKE CHARLES LA
401 PM CDT THU MAY 23 2013

LAZ027-TXZ259-260-232200-
NORTHERN JASPER TX-NORTHERN NEWTON TX-VERNON LA-
401 PM CDT THU MAY 23 2013

...SIGNIFICANT WEATHER ADVISORY FOR JASPER AND NEWTON COUNTIES...
SIGNIFICANT WEATHER ADVISORY FOR VERNON PARISH UNTIL 500 PM CDT...

AT 358 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 5 MILES NORTHWEST OF MAYFLOWER...MOVING EAST AT
10 MPH.

* THE STRONG THUNDERSTORM WILL BE NEAR...
  MAYFLOWER BY 425 PM...
  TOLEDO BEND DAM BY 500 PM...

THE PRIMARY THREATS FROM THIS STORM ARE CONTINUOUS LIGHTNING AND PEA
TO NICKEL SIZE HAIL. SEEK SHELTER IN A SAFE HOME OR BUILDING UNTIL
THIS STORM HAS PASSED.

LAT...LON 3120 9348 3100 9363 3113 9404 3114 9403
      3116 9392 3118 9363 3118 9360 3117 9358
      3120 9355 3122 9355

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 2:27 AM CDT	Areal Flood Warning	LCH	Acadia, Evangeline, Saint Landry	24 hr
May 23, 5:13 PM CDT	Areal Flood Advisory	LCH	Avoyelles, Rapides	2 hr
May 23, 5:18 PM CDT	Severe Thunderstorm Warning	LCH	Evangeline, Rapides	57 min
May 23, 5:31 PM CDT	Severe Thunderstorm Warning	LCH	Saint Landry, Saint Martin	29 min
May 23, 5:43 PM CDT	Areal Flood Advisory	LCH	Vernon	2 hr
May 23, 5:49 PM CDT	Areal Flood Advisory	LCH	Saint Landry, Saint Martin	116 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2013 Every severe thunderstorm warning in 2013

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.