Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 90, NWS Shreveport, LA

November 8, 2011Panola County, Shelby County, Texas; De Soto Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Nov 8, 2011, 4:30 PM CST for Panola County, Shelby County, Texas; De Soto Parish, Louisiana. It was in force for 30 min. 3 reports 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, 4:30 PM CST (22:30 UTC)
Expired: Nov 8, 2011, 5:00 PM CST
In force: 30 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties De Soto Parish, LA, Panola County, TX, Shelby County, TX

The radar

The Shreveport radar (KSHV), 52 km from the middle of the area, began a volume at 22:30 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, 4:45 PM CST	TORNADO	Joaquin, TX	JOAQUIN FD SPOTTED A TORNADO ON THE GROUND...HEADED NORTHEAST TOWARD LONGSTREET.
Nov 8, 4:53 PM CST	TORNADO	5 Ne Logansport, LA	AN EF2 TORNADO TOUCHED DOWN E OF STATE ROUTE 5 NEAR FUNSTON RD. NUMEROUS TREES WERE SNAPPED OFF AND A HOME WAS HEAVILY DAMAGED ALONG FUNSTON RD. SEVERAL TREES WERE ALSO UPROOTED AND A MOBILE HOME WAS DAMAGED. THE TORNADO CROSSED JONES RD AND WOOD SPRINGS RD SN
Nov 8, 5:00 PM CST	TORNADO	2 E Longstreet, LA	WIDE SWATH OF DOWNED TREES NEAR SMYRNA ROAD AND HIGHWAY 5.

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, 10.5 hours before the alert went out and 58 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.

441 
WFUS54 KSHV 082230
TORSHV
LAC031-TXC365-419-082300-
/O.NEW.KSHV.TO.W.0090.111108T2230Z-111108T2300Z/

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

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL SHELBY COUNTY IN EASTERN TEXAS...
  SOUTHEASTERN PANOLA COUNTY IN NORTHEAST TEXAS...
  WEST CENTRAL DE SOTO PARISH IN NORTHWEST LOUISIANA...

* UNTIL 500 PM CST

* AT 426 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES
  SOUTHEAST OF TENAHA...OR 7 MILES NORTH OF CENTER...MOVING NORTHEAST
  AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  JOAQUIN AND LOGANSPORT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3218 9393 3194 9375 3179 9416 3194 9429
TIME...MOT...LOC 2230Z 234DEG 22KT 3191 9413

$$

VII

1 follow-up statement

474 
WWUS54 KSHV 082255
SVSSHV

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

LAC031-TXC365-419-082300-
/O.CON.KSHV.TO.W.0090.000000T0000Z-111108T2300Z/
PANOLA TX-SHELBY TX-DE SOTO LA-
455 PM CST TUE NOV 8 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CST FOR SHELBY
AND PANOLA COUNTIES...AND DE SOTO PARISH...

AT 451 PM CST...A TORNADO WAS REPORTED ON THE GROUND...HEADING 
TOWARDS LONGSTREET...MOVING NORTHEAST AT 25 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3187 9397 3207 9410 3218 9393 3194 9375
TIME...MOT...LOC 2253Z 234DEG 22KT 3199 9400

$$

VII

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, 2:42 PM CST	Tornado Warning	SHV	Smith, Upshur	21 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, 5:02 PM CST	Tornado Warning	SHV	Caddo, De Soto	43 min
Nov 8, 5:35 PM CST	Tornado Warning	SHV	Bossier, Caddo, De Soto, Red River	25 min

Nearby

Tornado Warnings in Texas, 2011 Tornado Warnings in Louisiana, 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.