Alert archive / Texas / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 33, NWS Shreveport, LA

January 29, 20137 counties in Texas

NWS Shreveport, LA issued this severe thunderstorm warning at Jan 29, 2013, 11:21 PM CST for 7 counties in Texas. It was in force for 39 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: Jan 29, 2013, 11:21 PM CST (05:21 UTC)
Expired: Jan 30, 2013, 12:00 AM CST
In force: 39 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Angelina County, TX, Cherokee County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, San Augustine County, TX, Shelby County, TX

The watch it was issued in

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

Issued	Product	Office	Lasted
Jan 29, 5:37 PM CST	Tornado Watch	SPC	8 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 5.4 hours before the alert went out and 111 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: 1413 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 291 m²/s²
0-3 km storm-relative helicity: 335 m²/s²
Significant tornado parameter: 3.1
Supercell composite: 10.4

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 Shreveport, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jan 29, 10:29 PM CST, 52 minutes earlier.

Area forecast discussion, Jan 29, 10:29 PM CST, 52 minutes before

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Hazardous weather outlook, Jan 29, 11:53 AM CST, 11 hours 28 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SHREVEPORT LA
1153 AM CST TUE JAN 29 2013

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ096-097-108>112-124>126-136>138-149>153-165>167-301200-
SEVIER-HOWARD-LITTLE RIVER-HEMPSTEAD-NEVADA-MILLER-LAFAYETTE-
COLUMBIA-UNION AR-CADDO-BOSSIER-WEBSTER-CLAIBORNE-LINCOLN-
UNION LA-DE SOTO-RED RIVER-BIENVILLE-JACKSON-OUACHITA-SABINE LA-
NATCHITOCHES-WINN-GRANT-CALDWELL-LA SALLE-MCCURTAIN-BOWIE-
FRANKLIN-TITUS-CAMP-MORRIS-CASS-WOOD-UPSHUR-MARION-SMITH-GREGG-
HARRISON-CHEROKEE-RUSK-PANOLA-NACOGDOCHES-SHELBY-ANGELINA-
SAN AUGUSTINE-SABINE TX-
1153 AM CST TUE JAN 29 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTH CENTRAL
ARKANSAS...SOUTHWEST ARKANSAS...NORTH CENTRAL LOUISIANA...
NORTHWEST LOUISIANA...SOUTHEAST OKLAHOMA...EAST TEXAS AND
NORTHEAST TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

SHOWERS AND THUNDERSTORMS WILL INCREASE THIS AFTERNOON OVER
NORTHEAST TEXAS...SOUTHEAST OKLAHOMA...AND SOUTHWEST
ARKANSAS...NEAR A SURFACE BOUNDARY AND AHEAD OF A STRONG UPPER
LEVEL STORM SYSTEM EMERGING OUT INTO THE PLAINS. LARGE SCALE
FORCING IN ADDITION TO THE VERY STRONG WIND SHEAR AND AVAILABLE
SURFACE BASED INSTABILITY WILL RESULT IN A HEIGHTENING POTENTIAL
FOR SEVERE THUNDERSTORM DEVELOPMENT...WITH DAMAGING WINDS AND
ISOLATED TORNADOES THE PRIMARY THREATS. LOCALLY HEAVY RAINFALL
WILL BE POSSIBLE IN THE STRONGER STORMS THIS AFTERNOON...ESPECIALLY
OVER EXTREME NORTHEAST TEXAS...SOUTHWEST OKLAHOMA...AND SOUTHWEST
ARKANSAS...BEFORE A SQUALL LINE DEVELOPS BY THIS EVENING AND
ACCELERATES EAST ACROSS NORTH LOUISIANA AND SOUTHWEST ARKANSAS
TONIGHT. THE SEVERE WEATHER THREAT WILL DIMINISH FROM WEST TO EAST
OVERNIGHT.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

STRONG NORTHWEST WINDS OF 15 TO 25 MPH...WITH GUSTS TO 30 TO 35
MPH...IS EXPECTED BEHIND A COLD FRONTAL PASSAGE WEDNESDAY
MORNING...BEFORE SUBSIDING BY EARLY EVENING.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF EMERGENCY MANAGERS...SKYWARN NETWORKS...AND AMATEUR
RADIO OPERATORS...WILL BE NEEDED THIS AFTERNOON AND TONIGHT.

15

In the hours before

Local storm report, Jan 29, 10:53 PM CST, 28 minutes before

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Local storm report, Jan 29, 10:55 PM CST, 26 minutes before

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Local storm report, Jan 29, 10:56 PM CST, 25 minutes before

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Local storm report, Jan 29, 10:57 PM CST, 24 minutes before

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Local storm report, Jan 29, 11:01 PM CST, 20 minutes before

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Local storm report, Jan 29, 11:07 PM CST, 14 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 29, 6:02 PM CST	Severe Thunderstorm Warning	SHV	Franklin, Wood	58 min
Jan 29, 6:14 PM CST	Severe Thunderstorm Warning	SHV	Franklin, Red River, Titus	46 min
Jan 29, 6:24 PM CST	Severe Thunderstorm Warning	SHV	Smith, Wood	66 min
Jan 29, 6:52 PM CST	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Morris, Red River, Titus and 1 more	38 min
Jan 29, 7:17 PM CST	Severe Thunderstorm Warning	SHV	Cass, Cherokee, Gregg, Harrison, Marion, Panola and 3 more	58 min
Jan 29, 7:29 PM CST	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Morris, Upshur	61 min
Jan 29, 8:10 PM CST	Severe Thunderstorm Warning	SHV	Angelina, Cherokee, Nacogdoches	65 min
Jan 29, 8:15 PM CST	Severe Thunderstorm Warning	SHV	Harrison, Panola, Shelby	60 min
Jan 29, 8:19 PM CST	Severe Thunderstorm Warning	SHV	Cass	56 min
Jan 29, 9:09 PM CST	Severe Thunderstorm Warning	SHV	Shelby	51 min
Jan 29, 9:21 PM CST	Severe Thunderstorm Warning	SHV	Angelina, Nacogdoches, San Augustine	54 min
Jan 29, 9:52 PM CST	Severe Thunderstorm Warning	SHV	Angelina, Sabine, San Augustine, Shelby	53 min
Jan 30, 1:28 AM CST	Lake Wind Advisory	SHV	Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more	17 hr
Jan 29, 7:31 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Lincoln, Union	29 min
Jan 29, 8:04 PM CST	Tornado Warning	SHV	Caldwell, Grant, Jackson, LaSalle, Winn	41 min
Jan 29, 8:08 PM CST	Tornado Warning	SHV	Union	37 min
Jan 29, 8:29 PM CST	Tornado Warning	SHV	Ouachita, Union	31 min
Jan 29, 8:38 PM CST	Tornado Warning	SHV	Caldwell, Ouachita	37 min
Jan 29, 9:07 PM CST	Tornado Warning	SHV	Caldwell, Jackson, Ouachita, Union	38 min
Jan 29, 9:14 PM CST	Severe Thunderstorm Warning	SHV	Claiborne, Union, Webster	61 min
Jan 29, 9:31 PM CST	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Winn	44 min
Jan 29, 10:01 PM CST	Severe Thunderstorm Warning	SHV	Bienville, Claiborne, De Soto, Jackson, Lincoln, Natchitoches and 3 more	59 min
Jan 29, 10:08 PM CST	Severe Thunderstorm Warning	SHV	Caldwell, Ouachita	22 min
Jan 29, 10:42 PM CST	Severe Thunderstorm Warning	SHV	Grant, Natchitoches, Sabine, Winn	63 min
Jan 29, 10:59 PM CST	Severe Thunderstorm Warning	SHV	Caldwell, Jackson, Ouachita, Union, Winn	61 min
Jan 29, 11:42 PM CST	Severe Thunderstorm Warning	SHV	Grant, LaSalle	63 min
Jan 29, 11:57 PM CST	Severe Thunderstorm Warning	SHV	Caldwell	33 min
Jan 30, 12:42 AM CST	Severe Thunderstorm Warning	SHV	LaSalle	48 min
Jan 29, 6:40 PM CST	Severe Thunderstorm Warning	SHV	Little River, Sevier	50 min

Nearby

Severe Thunderstorm Warnings in Texas, 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.