Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 25, NWS Brownsville, TX

May 11, 2012Cameron County, Texas

NWS Brownsville, TX issued this tornado warning at May 11, 2012, 4:47 AM CDT for Cameron County, Texas. It was in force for 28 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: May 11, 2012, 4:47 AM CDT (09:47 UTC)
Expired: May 11, 2012, 5:15 AM CDT
In force: 28 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 29 km from the middle of the area, began a volume at 09:47 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 10, 7:50 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 9.8 hours before the alert went out and 30 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: 2994 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.7

Open this sounding in Storm Lab

The text

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

398 
WFUS54 KBRO 110947
TORBRO
TXC061-111015-
/O.NEW.KBRO.TO.W.0025.120511T0947Z-120511T1015Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
447 AM CDT FRI MAY 11 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL CAMERON COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 515 AM CDT

* AT 445 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE   
TRACKING A TORNADO ON RADAR OVER ABOUT 3 MILES WEST OF 
BAYVIEW...MOVING EAST AT 40 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  HOLLY BEACH.
  CAMERON COUNTY AIRPORT
  LAGUNA VISTA
  BUENA VISTA ROAD
  HIGHWAY 510

IN ADDITION TO THE THREAT OF A TORNADO...THIS STORM WILL BE CAPABLE 
OF PRODUCING DAMAGING WINDS TO 60 MPH AND HAIL TO THE SIZE OF HALF 
DOLLARS.

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 2611 9729 2610 9729 2608 9747 2619 9754
      2625 9730 2623 9730 2622 9731 2621 9730
      2619 9729 2617 9730 2616 9729 2614 9729
      2612 9728
TIME...MOT...LOC 0945Z 252DEG 34KT 2614 9741

$$

JGG

2 follow-up statements

902 
WWUS54 KBRO 111002
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
502 AM CDT FRI MAY 11 2012

TXC061-111015-
/O.CON.KBRO.TO.W.0025.000000T0000Z-120511T1015Z/
CAMERON-
502 AM CDT FRI MAY 11 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 AM CDT FOR CENTRAL
CAMERON COUNTY...

AT 502 AM CDT NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
TRACK A TORNADO 9 MILES NORTHWEST OF PORT ISABEL...NEAR THE CAMERON 
COUNTY AIRPORT...MOVING EAST AT 30 MPH. STRAIGHT LINE WINDS TO 60 
MPH AND LARGE HAIL WILL ALSO BE POSSIBLE FURTHER SOUTH TOWARDS 
BAYVIEW AND LAGUNA VISTA.

THE TORNADO WILL BE NEAR...
  HOLLY BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 2611 9729 2610 9729 2608 9747 2609 9747
      2616 9743 2622 9743 2625 9730 2623 9730
      2622 9731 2621 9730 2619 9729 2617 9730
      2616 9729 2614 9729 2612 9728
TIME...MOT...LOC 1002Z 255DEG 26KT 2617 9732

$$

JGG

303 
WWUS54 KBRO 111011
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
511 AM CDT FRI MAY 11 2012

TXC061-111021-
/O.EXP.KBRO.TO.W.0025.000000T0000Z-120511T1015Z/
CAMERON-
511 AM CDT FRI MAY 11 2012

...THE TORNADO WARNING FOR CENTRAL CAMERON COUNTY WILL EXPIRE AT 515
AM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED INTO THE SOUTHERN 
LAGUNA MADRE.

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 2611 9729 2610 9729 2608 9747 2609 9747
      2616 9743 2622 9743 2625 9730 2623 9730
      2622 9731 2621 9730 2619 9729 2617 9730
      2616 9729 2614 9729 2612 9728
TIME...MOT...LOC 1011Z 255DEG 26KT 2618 9725

$$

JGG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 9:37 PM CDT	Severe Thunderstorm Warning	BRO	Zapata	53 min
May 10, 10:34 PM CDT	Severe Thunderstorm Warning	BRO	Jim Hogg, Starr, Zapata	71 min
May 10, 10:56 PM CDT	Tornado Warning	BRO	Zapata	34 min
May 10, 11:18 PM CDT	Areal Flood Advisory	BRO	Jim Hogg, Zapata	57 min
May 10, 11:24 PM CDT	Tornado Warning	BRO	Zapata	36 min
May 10, 11:33 PM CDT	Tornado Warning	BRO	Jim Hogg, Starr	42 min
May 10, 11:36 PM CDT	Flash Flood Warning	BRO	Jim Hogg, Zapata	84 min
May 10, 11:41 PM CDT	Tornado Warning	BRO	Jim Hogg, Zapata	24 min
May 10, 11:44 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Hidalgo, Jim Hogg, Starr, Zapata	76 min
May 11, 12:01 AM CDT	Tornado Warning	BRO	Jim Hogg	29 min
May 11, 12:13 AM CDT	Tornado Warning	BRO	Brooks, Jim Hogg	47 min
May 11, 12:47 AM CDT	Severe Thunderstorm Warning	BRO	Brooks, Hidalgo, Jim Hogg, Kenedy, Starr, Willacy	88 min
May 11, 1:07 AM CDT	Areal Flood Advisory	BRO	Starr	53 min
May 11, 1:39 AM CDT	Special Marine Warning	BRO		2 hr
May 11, 1:58 AM CDT	Areal Flood Advisory	BRO	Hidalgo, Starr	62 min
May 11, 2:14 AM CDT	Special Marine Warning	BRO		2 hr
May 11, 2:49 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	41 min
May 11, 3:14 AM CDT	Tornado Warning	BRO	Cameron	31 min
May 11, 3:41 AM CDT	Special Marine Warning	BRO		2 hr
May 11, 3:41 AM CDT	Tornado Warning	BRO	Cameron, Willacy	34 min
May 11, 3:53 AM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	52 min
May 11, 4:10 AM CDT	Severe Thunderstorm Warning	BRO	Cameron	38 min
May 11, 4:20 AM CDT	Special Marine Warning	BRO		115 min
May 11, 4:29 AM CDT	Tornado Warning	BRO	Cameron	31 min
May 11, 6:11 AM CDT	Special Marine Warning	BRO		64 min
May 11, 6:30 AM CDT	Tornado Warning	BRO	Cameron	30 min
May 11, 6:45 AM CDT	Special Marine Warning	BRO		60 min
May 11, 6:58 AM CDT	Tornado Warning	BRO	Cameron	32 min
May 11, 7:12 AM CDT	Special Marine Warning	BRO		93 min
May 11, 11:48 AM CDT	Special Marine Warning	BRO		57 min
May 11, 12:37 PM CDT	Special Marine Warning	BRO		53 min
May 11, 1:27 PM CDT	Special Marine Warning	BRO		63 min
May 11, 2:01 PM CDT	Special Marine Warning	BRO		59 min
May 11, 2:26 PM CDT	Special Marine Warning	BRO		49 min
May 11, 3:25 PM CDT	Special Marine Warning	BRO		50 min

Nearby

Tornado Warnings in Texas, 2012 Every tornado warning in 2012 Tornadoes in 2012

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.