Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 176, NWS Lake Charles, LA

August 26, 2009Jasper County, Tyler County, Texas

NWS Lake Charles, LA issued this severe thunderstorm warning at Aug 26, 2009, 4:26 PM CDT for Jasper County, Tyler County, Texas. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 26, 2009, 4:26 PM CDT (21:26 UTC)
Expired
Aug 26, 2009, 5:30 PM CDT
In force
64 min
Issued by
NWS Lake Charles, LA
Area
Storm-based polygon

Counties Jasper County, TX, Tyler County, TX

The radar

The Lake Charles radar (KLCH), 118 km from the middle of the area, began a volume at 21:29 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 26, 10:47 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.4 hours before the alert went out and 119 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 12:00Z on 2009-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3625 joules per kilogram.LCLEL10008507005003002001001 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 12:00Z on 2009-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
3625 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
573 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 Aug 26, 4:18 PM CDT, 8 minutes earlier.

Area forecast discussion, Aug 26, 4:18 PM CDT, 8 minutes before
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Hazardous weather outlook, Aug 26, 5:20 AM CDT, 11 hours 6 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE LAKE CHARLES LA
520 AM CDT WED AUG 26 2009

GMZ430-432-435-450-452-455-470-472-475-LAZ027>033-041>045-051>055-
TXZ180>182-201-215-216-271030-
SABINE LAKE-CALCASIEU LAKE-VERMILION BAY-
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 EXTENDING FROM 20 NM
TO 60 NM-
WATERS FROM INTRACOASTAL CITY, LA TO CAMERON, LA EXTENDING FROM
20 NM TO 60 NM-
WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY, LA
EXTENDING FROM 20 NM TO 60 NM-VERNON-RAPIDES-AVOYELLES-BEAUREGARD-
ALLEN-EVANGELINE-ST. LANDRY-CALCASIEU-JEFFERSON DAVIS-ACADIA-
LAFAYETTE-UPPER ST. MARTIN-CAMERON-VERMILION-IBERIA-ST. MARY-
LOWER ST. MARTIN-TYLER-JASPER-NEWTON-HARDIN-JEFFERSON-ORANGE-
520 AM CDT WED AUG 26 2009

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

MINIMAL SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED TODAY AND
THESE MAINLY OVER SOUTHEAST TEXAS. ANY THUNDERSTORM DEVELOPMENT
ACROSS THIS AREA WILL HAVE THE POTENTIAL FOR SOME LARGE HAIL AND
DAMAGING DOWNBURST WINDS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

RAIN CHANCES ON THURSDAY WILL AGAIN BE PRIMARILY CONFINED TO
SOUTHEAST TEXAS. SHOWER AND THUNDERSTORM ACTIVITY WILL OVERSPREAD
THE ENTIRE AREA FRIDAY AND INTO THE WEEKEND AS A COLD FRONT
APPROACHES AND MOVES ACROSS THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY.

In the hours before

Special weather statement, Aug 26, 1:51 PM CDT, 2 hours 35 minutes before
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Local storm report, Aug 26, 2:04 PM CDT, 2 hours 22 minutes before
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Local storm report, Aug 26, 2:06 PM CDT, 2 hours 20 minutes before
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Local storm report, Aug 26, 2:20 PM CDT, 2 hours 6 minutes before
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Special weather statement, Aug 26, 2:26 PM CDT, 2 hours before
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Local storm report, Aug 26, 2:52 PM CDT, 1 hour 34 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 10:24 AM CDTSevere Thunderstorm WarningLCHVernon36 min
Aug 26, 12:54 PM CDTSevere Thunderstorm WarningLCHAllen, Beauregard, Calcasieu51 min
Aug 26, 1:16 PM CDTSevere Thunderstorm WarningLCHCalcasieu44 min
Aug 26, 1:25 PM CDTSevere Thunderstorm WarningLCHAllen, Beauregard35 min
Aug 26, 1:37 PM CDTSevere Thunderstorm WarningLCHAllen, Jefferson Davis38 min
Aug 26, 1:47 PM CDTSevere Thunderstorm WarningLCHAllen, Rapides, Vernon43 min
Aug 26, 2:44 PM CDTSevere Thunderstorm WarningLCHEvangeline31 min
Aug 26, 2:46 PM CDTSevere Thunderstorm WarningLCHRapides29 min
Aug 26, 4:05 PM CDTSevere Thunderstorm WarningLCHVernon40 min
Aug 25, 8:58 PM CDTSevere Thunderstorm WarningLCHTyler62 min
Aug 25, 9:43 PM CDTSevere Thunderstorm WarningLCHJasper, Tyler62 min
Aug 25, 10:41 PM CDTSevere Thunderstorm WarningLCHHardin, Jasper, Tyler64 min
Aug 26, 10:15 AM CDTSevere Thunderstorm WarningLCHJasper, Tyler45 min
Aug 26, 11:34 AM CDTSevere Thunderstorm WarningLCHJasper, Newton26 min

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009

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.