Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 2, NWS Shreveport, LA

March 8, 2011Red River County, Texas

NWS Shreveport, LA issued this tornado warning at Mar 8, 2011, 4:33 PM CST for Red River County, Texas. It was in force for 57 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: Mar 8, 2011, 4:33 PM CST (22:33 UTC)
Expired: Mar 8, 2011, 5:30 PM CST
In force: 57 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 22:33 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, 5:15 PM CST	TORNADO	8 W Clarksville, TX	AN EF1 TORNADO TOUCHED DOWN ABOUT 8 MILES WEST OF CLARKSVILLE TEXAS...AND MOVED EAST NORTHEAST TO A POINT ABOUT 3 MILES EAST NORTHEAST OF CLARKSVILLE. DAMAGE PATH WAS 11 MILES LONG AND 225 YARDS WIDE. ABOUT 20 HOMES SUFFERED MILD TO MODERATE DAMAGE ON THE NORT
Mar 8, 5:20 PM CST	TORNADO	4 E Detroit, TX	CHASERS CONFIRMED RAIN WRAPPED TORNADO ON THE GROUND NEAR BAGWELL..EAST OF DETROIT ALONG US 82
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, 10.6 hours before the alert went out and 162 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.

672 
WFUS54 KSHV 082233
TORSHV
TXC387-082330-
/O.NEW.KSHV.TO.W.0002.110308T2233Z-110308T2330Z/

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

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

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

* UNTIL 530 PM CST

* AT 426 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 20 MILES WEST OF
  BAGWELL...OR NEAR PARIS...MOVING EAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BOGATA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS WHICH DESTROYED
A BARN.

DO NOT USE HIGHWAY OVERPASSES FOR SHELTER. OVERPASSES DO NOT PROVIDE
PROTECTION FROM TORNADIC WINDS. VEHICLES STOPPED UNDER BRIDGES BLOCK
TRAFFIC AND PREVENT PEOPLE FROM GETTING OUT OF THE STORM'S PATH AND
TO SHELTER. IF YOU CANNOT DRIVE AWAY FROM THE TORNADO...GET OUT OF
YOUR VEHICLE AND LIE FLAT IN A DITCH AS A LAST RESORT.

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 3373 9530 3372 9476 3334 9475 3335 9479
      3338 9482 3340 9488 3340 9500 3339 9504
      3340 9509 3339 9520 3338 9523 3339 9530
TIME...MOT...LOC 2232Z 273DEG 34KT 3364 9545

$$

VII

1 follow-up statement

324 
WWUS54 KSHV 082319
SVSSHV

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

TXC387-082330-
/O.CON.KSHV.TO.W.0002.000000T0000Z-110308T2330Z/
RED RIVER TX-
519 PM CST TUE MAR 8 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM CST FOR RED RIVER
COUNTY...

AT 511 PM CST...TRAINED WEATHER SPOTTERS REPORTED A TORNADO.  THIS 
TORNADO WAS LOCATED EAST OF DETROIT...NEAR HIGHWAY 82...MOVING EAST 
AT 30 MPH. THIS TORNADO WAS REPORTED TO BE RAIN WRAPPED.

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 3373 9530 3372 9476 3334 9475 3335 9479
      3338 9482 3340 9488 3340 9500 3339 9504
      3340 9509 3339 9520 3338 9523 3339 9530
TIME...MOT...LOC 2316Z 273DEG 34KT 3362 9495

$$

VII

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 8, 5:25 PM CST	Tornado Warning	SHV	Red River	30 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.