Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 3, NWS Shreveport, LA

March 8, 2011Red River County, Texas

NWS Shreveport, LA issued this tornado warning at Mar 8, 2011, 5:25 PM CST for Red River County, Texas. It was in force for 30 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: Mar 8, 2011, 5:25 PM CST (23:25 UTC)
Expired: Mar 8, 2011, 5:55 PM CST
In force: 30 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

County Red River County, TX

The radar

The Shreveport radar (KSHV), 158 km from the middle of the area, began a volume at 23:28 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
Mar 8, 5:30 PM CST	TORNADO	2 N Clarksville, TX	CHASERS AND SPOTTERS CONFIRM TORNADO ON THE GROUND...RAIN WRAPPED. SEMI ON A CAR...TRAILERS FLIPPED...POWERLINES DOWN...MANY ROOFS DAMAGED TO HOMES.

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
Mar 8, 1:34 PM CST	Tornado Watch	SPC	9 hr

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 11.4 hours before the alert went out and 161 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 448 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 608 m²/s²
0-3 km storm-relative helicity: 684 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

161 
WFUS54 KSHV 082325
TORSHV
TXC387-090015-
/O.NEW.KSHV.TO.W.0003.110308T2325Z-110309T0015Z/

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

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN RED RIVER COUNTY IN NORTHEAST TEXAS...
  THIS INCLUDES THE CITIES OF...CLARKSVILLE...BOXELDER...

* UNTIL 615 PM CST

* AT 520 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS ARE   
TRACKING A TORNADO JUST NORTHWEST CLARKSVILLE...MOVING EAST AT 35 
MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  CUTHAND...ANNONA...ENGLISH...AVERY AND LYDIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT USE YOUR CAR TO TRY TO OUTRUN A TORNADO. CARS ARE EASILY
TOSSED AROUND BY TORNADO WINDS. IF YOU ARE CAUGHT IN THE PATH OF A
TORNADO...LEAVE THE CAR AND GO TO A STRONG BUILDING. IF NO SAFE
STRUCTURE IS NEARBY...SEEK SHELTER IN A DITCH OR LOW SPOT AND COVER
YOUR HEAD.

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.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL 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 3376 9515 3370 9475 3334 9474 3337 9482
      3339 9483 3339 9485 3354 9526
TIME...MOT...LOC 2324Z 284DEG 32KT 3364 9506

$$

VII

2 follow-up statements

517 
WWUS54 KSHV 082328
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
528 PM CST TUE MAR 8 2011

TXC387-090015-
/O.CON.KSHV.TO.W.0003.000000T0000Z-110309T0015Z/
RED RIVER TX-
528 PM CST TUE MAR 8 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM CST FOR RED RIVER
COUNTY...

AT 524 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS AND STORM
SPOTTERS WERE TRACKING A LARGE AND EXTREMELY DANGEROUS TORNADO.  THIS
TORNADO WAS ON THE GROUND IN CITY OF CLARKSVILLE...MOVING EAST AT 35 
MPH.

RESIDENTS IN AND NEAR CLARKSDALE...TAKE COVER NOW!!!!


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL 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 3376 9515 3370 9475 3334 9474 3337 9482
      3339 9483 3339 9485 3354 9526
TIME...MOT...LOC 2327Z 284DEG 32KT 3363 9503

$$

VII

484 
WWUS54 KSHV 082355
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
555 PM CST TUE MAR 8 2011

TXC387-090004-
/O.CAN.KSHV.TO.W.0003.000000T0000Z-110309T0015Z/
RED RIVER TX-
555 PM CST TUE MAR 8 2011

...THE TORNADO WARNING FOR RED RIVER COUNTY IS CANCELLED...

THIS STORM HAS WEAKENED CONSIDERABLY WITH NO ADDITIONAL 
SEVERE WEATHER EXPECTED. 

LAT...LON 3376 9515 3370 9475 3334 9474 3337 9482
      3339 9483 3339 9485 3354 9526
TIME...MOT...LOC 2354Z 284DEG 32KT 3357 9475

$$

VII

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 8, 4:33 PM CST	Tornado Warning	SHV	Red River	57 min
Mar 8, 5:40 PM CST	Tornado Warning	SHV	Red River	50 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.