Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 1, NWS Brownsville, TX

October 9, 2011Kenedy County, Willacy County, Texas

NWS Brownsville, TX issued this tornado warning at Oct 9, 2011, 3:11 PM CDT for Kenedy County, Willacy County, Texas. It was in force for 34 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
Oct 9, 2011, 3:11 PM CDT (20:11 UTC)
Expired
Oct 9, 2011, 3:45 PM CDT
In force
34 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon

Counties Kenedy County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 67 km from the middle of the area, began a volume at 20:12 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 nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 8.2 hours before the alert went out and 69 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, Brownsville Intl, TX at 12:00Z on 2011-10-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2641 joules per kilogram.LCLEL10008507005003002001001 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, Brownsville Intl, TX at 12:00Z on 2011-10-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 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
2641 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
618 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

558 
WFUS54 KBRO 092011
TORBRO
TXC261-489-092045-
/O.NEW.KBRO.TO.W.0001.111009T2011Z-111009T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
311 PM CDT SUN OCT 9 2011

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN KENEDY COUNTY IN DEEP SOUTH TEXAS.
  NORTHEASTERN WILLACY COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 345 PM CDT

* AT 311 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
  TRACKING A TORNADO OVER CENTRAL WILLACY COUNTY...MOVING EAST AT 15
  MPH.

* THE TORNADO WILL BE NEAR...
  WILLAMAR BY 310 PM CDT
  PORT MANSFIELD BY 340 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM! MOVE INTO THE INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING...AWAY FROM WINDOWS. COVER YOUR HEAD AND
BODY WITH PILLOWS OR BLANKETS.

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&

LAT...LON 2656 9739 2654 9742 2652 9741 2652 9739
      2646 9737 2651 9740 2647 9742 2647 9739
      2645 9740 2641 9766 2659 9771 2666 9744
      2657 9742 2657 9740 2656 9739 2657 9733
      2655 9733
TIME...MOT...LOC 2011Z 257DEG 15KT 2652 9758

$$

64
2 follow-up statements
478 
WWUS54 KBRO 092029
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
329 PM CDT SUN OCT 9 2011

TXC261-489-092045-
/O.CON.KBRO.TO.W.0001.000000T0000Z-111009T2045Z/
WILLACY-KENEDY-
329 PM CDT SUN OCT 9 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR
SOUTHEASTERN KENEDY AND NORTHEASTERN WILLACY COUNTIES...

AT 328 PM CDT NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
TRACK A TORNADO 9 MILES WEST OF PORT MANSFIELD...MOVING EAST AT 15 
MPH. A SECOND AREA OF WEAKER ROTATION WAS NOTED 4 MILES WEST OF SAN 
PERLITA...ALSO MOVING EAST AT 15MPH. THIS STORM WILL BE ACCOMPANIED 
BY STRONG OUTFLOW WINDS.

THE TORNADO WILL BE NEAR...
  PORT MANSFIELD BY 340 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM! ACT QUICKLY. GO TO A SMALL INTERIOR ROOM
ON THE LOWEST FLOOR OF A STURDY BUILDING...AWAY FROM WINDOWS. COVER
YOUR HEAD WITH PILLOWS OR BLANKETS.

PLEASE REPORT TORNADOES OR FUNNEL CLOUDS...WINDS OF 58 MPH OR
HIGHER...HAIL THE SIZE OF PENNIES OR LARGER...AND ANY WIND DAMAGE TO
YOUR NATIONAL WEATHER SERVICE IN BROWNSVILLE BY CALLING 956-504-1432.

&&


LAT...LON 2656 9739 2654 9742 2652 9741 2652 9739
      2646 9737 2651 9740 2647 9742 2647 9739
      2645 9740 2641 9766 2659 9771 2666 9744
      2657 9742 2657 9740 2656 9739 2657 9733
      2655 9733
TIME...MOT...LOC 2028Z 264DEG 8KT 2653 9757

$$

64
638 
WWUS54 KBRO 092045
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
345 PM CDT SUN OCT 9 2011

TXC261-489-092055-
/O.EXP.KBRO.TO.W.0001.000000T0000Z-111009T2045Z/
WILLACY-KENEDY-
345 PM CDT SUN OCT 9 2011

...THE TORNADO WARNING FOR SOUTHEASTERN KENEDY AND NORTHEASTERN
WILLACY COUNTIES HAS EXPIRED...

AT 345 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THE TORNADO
HAD DISSIPATED...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

DOPPLER RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY 
WINDS WERE STILL POSSIBLE FROM THE THUNDERSTORM AS IT MOVES EAST AT 
20 MPH.


LAT...LON 2656 9739 2654 9742 2652 9741 2652 9739
      2646 9737 2651 9740 2647 9742 2647 9739
      2645 9740 2641 9766 2659 9771 2666 9744
      2657 9742 2657 9740 2656 9739 2657 9733
      2655 9733
TIME...MOT...LOC 2029Z 264DEG 8KT 2653 9757

$$

The office that day

Everything else NWS Brownsville, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 9, 12:45 PM CDTSevere Thunderstorm WarningBROJim Hogg, Zapata30 min
Oct 9, 1:03 PM CDTAreal Flood AdvisoryBROJim Hogg, Zapata117 min
Oct 9, 2:10 PM CDTSpecial Marine WarningBRO2 hr
Oct 9, 2:45 PM CDTSevere Thunderstorm WarningBROKenedy, Willacy30 min
Oct 9, 3:33 PM CDTSpecial Marine WarningBRO117 min
Oct 9, 3:38 PM CDTAreal Flood AdvisoryBROKenedy, Willacy97 min
Oct 9, 4:11 PM CDTSpecial Marine WarningBRO3 hr
Oct 9, 5:33 PM CDTSpecial Marine WarningBRO117 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.