Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 84, NWS Shreveport, LA

November 8, 2011Smith County, Upshur County, Wood County, Texas

NWS Shreveport, LA issued this tornado warning at Nov 8, 2011, 2:14 PM CST for Smith County, Upshur County, Wood County, Texas. It was in force for 31 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
Nov 8, 2011, 2:14 PM CST (20:14 UTC)
Expired
Nov 8, 2011, 2:45 PM CST
In force
31 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon

Counties Smith County, TX, Upshur County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 134 km from the middle of the area, began a volume at 20:14 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
Nov 8, 10:49 AM CSTTornado WatchSPC7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 8.2 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-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2011-11-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2011-11-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 296 square meters per square second.193958Sfc1 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
12 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
496 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
296 m²/s²
0-3 km storm-relative helicity
361 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

332 
WFUS54 KSHV 082014
TORSHV
TXC423-459-499-082045-
/O.NEW.KSHV.TO.W.0084.111108T2014Z-111108T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
214 PM CST TUE NOV 8 2011

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL SMITH COUNTY IN NORTHEAST TEXAS...
  SOUTHWESTERN UPSHUR COUNTY IN NORTHEAST TEXAS...
  SOUTHEASTERN WOOD COUNTY IN NORTHEAST TEXAS...

* UNTIL 245 PM CST

* AT 210 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR LINDALE...
  OR 11 MILES NORTHWEST OF TYLER...MOVING NORTHEAST AT 30 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  HAWKINS AND BIG SANDY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3270 9526 3257 9507 3241 9531 3250 9543
TIME...MOT...LOC 2014Z 224DEG 26KT 3250 9536

$$

23
1 follow-up statement
245 
WWUS54 KSHV 082029
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
229 PM CST TUE NOV 8 2011

TXC423-459-499-082045-
/O.CON.KSHV.TO.W.0084.000000T0000Z-111108T2045Z/
SMITH TX-UPSHUR TX-WOOD TX-
229 PM CST TUE NOV 8 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CST FOR WOOD...
UPSHUR AND SMITH COUNTIES...

AT 227 PM CST...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS
LOCATED NEAR HAWKINS...OR 16 MILES WEST OF GLADEWATER...MOVING
NORTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BIG
SANDY

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

&&

LAT...LON 3265 9519 3257 9507 3247 9523 3257 9528
TIME...MOT...LOC 2029Z 238DEG 31KT 3256 9520

$$

23

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 8, 1:13 PM CSTTornado WarningSHVCherokee, Nacogdoches32 min
Nov 8, 1:43 PM CSTTornado WarningSHVNacogdoches, Rusk47 min
Nov 8, 1:47 PM CSTSevere Thunderstorm WarningSHVCamp, Franklin, Smith, Upshur, Wood58 min
Nov 8, 2:27 PM CSTTornado WarningSHVPanola, Rusk, Shelby11 min
Nov 8, 2:36 PM CSTTornado WarningSHVSmith11 min
Nov 8, 2:42 PM CSTTornado WarningSHVSmith, Upshur21 min
Nov 8, 3:00 PM CSTSevere Thunderstorm WarningSHVCherokee, Gregg, Rusk, Smith45 min
Nov 8, 3:02 PM CSTSevere Thunderstorm WarningSHVCamp, Cass, Gregg, Harrison, Marion, Morris and 1 more43 min
Nov 8, 3:21 PM CSTTornado WarningSHVNacogdoches, Panola, Rusk24 min
Nov 8, 3:58 PM CSTSevere Thunderstorm WarningSHVPanola, Shelby47 min
Nov 8, 4:30 PM CSTTornado WarningSHVPanola, Shelby30 min

Nearby

Tornado Warnings in Texas, 2011Every tornado warning in 2011Tornadoes in 2011

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.