Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 88, NWS Shreveport, LA

November 8, 2011Smith County, Upshur County, Texas

NWS Shreveport, LA issued this tornado warning at Nov 8, 2011, 2:42 PM CST for Smith County, Upshur County, Texas. It was in force for 21 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: Nov 8, 2011, 2:42 PM CST (20:42 UTC)
Expired: Nov 8, 2011, 3:03 PM CST
In force: 21 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Smith County, TX, Upshur County, TX

The radar

The Shreveport radar (KSHV), 109 km from the middle of the area, began a volume at 20:44 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
Nov 8, 3:06 PM CST	HAIL 0.75	Union Grove, TX

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
Nov 8, 10:49 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 8.7 hours before the alert went out and 117 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: 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.

662 
WFUS54 KSHV 082042
TORSHV
TXC423-459-082115-
/O.NEW.KSHV.TO.W.0088.111108T2042Z-111108T2115Z/

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

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN SMITH COUNTY IN NORTHEAST TEXAS...
  SOUTHWESTERN UPSHUR COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITY OF GILMER...

* UNTIL 315 PM CST

* AT 240 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR BIG
  SANDY...OR 11 MILES WEST OF GLADEWATER...MOVING NORTHEAST AT 30
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEST
  MOUNTAIN AND EAST MOUNTAIN...

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.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

&&

LAT...LON 3279 9497 3259 9484 3255 9492 3254 9497
      3252 9499 3249 9513 3266 9514
TIME...MOT...LOC 2042Z 238DEG 26KT 3260 9510

$$

23

1 follow-up statement

567 
WWUS54 KSHV 082103
SVSSHV

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

TXC423-459-082113-
/O.CAN.KSHV.TO.W.0088.000000T0000Z-111108T2115Z/
SMITH TX-UPSHUR TX-
303 PM CST TUE NOV 8 2011

...THE TORNADO WARNING FOR UPSHUR AND SMITH COUNTIES IS CANCELLED...

LAT...LON 3279 9497 3259 9484 3255 9492 3254 9497
      3252 9499 3249 9513 3266 9514
TIME...MOT...LOC 2103Z 238DEG 26KT 3268 9495

$$

23

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 8, 1:13 PM CST	Tornado Warning	SHV	Cherokee, Nacogdoches	32 min
Nov 8, 1:43 PM CST	Tornado Warning	SHV	Nacogdoches, Rusk	47 min
Nov 8, 1:47 PM CST	Severe Thunderstorm Warning	SHV	Camp, Franklin, Smith, Upshur, Wood	58 min
Nov 8, 2:14 PM CST	Tornado Warning	SHV	Smith, Upshur, Wood	31 min
Nov 8, 2:27 PM CST	Tornado Warning	SHV	Panola, Rusk, Shelby	11 min
Nov 8, 2:36 PM CST	Tornado Warning	SHV	Smith	11 min
Nov 8, 3:00 PM CST	Severe Thunderstorm Warning	SHV	Cherokee, Gregg, Rusk, Smith	45 min
Nov 8, 3:02 PM CST	Severe Thunderstorm Warning	SHV	Camp, Cass, Gregg, Harrison, Marion, Morris and 1 more	43 min
Nov 8, 3:21 PM CST	Tornado Warning	SHV	Nacogdoches, Panola, Rusk	24 min
Nov 8, 3:58 PM CST	Severe Thunderstorm Warning	SHV	Panola, Shelby	47 min
Nov 8, 4:30 PM CST	Tornado Warning	SHV	Panola, Shelby	30 min

Nearby

Tornado Warnings in Texas, 2011 Every tornado warning in 2011 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.