Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 87, NWS Brownsville, TX

July 26, 2012Starr County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Jul 26, 2012, 8:49 PM CDT for Starr County, Texas. It was in force for 41 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: Jul 26, 2012, 8:49 PM CDT (01:49 UTC)
Expired: Jul 26, 2012, 9:30 PM CDT
In force: 41 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Starr County, TX

The radar

The Brownsville radar (KBRO), 179 km from the middle of the area, began a volume at 01:52 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 00:00Z, 1.8 hours before the alert went out and 181 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: 1971 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 964 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 78 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.

266 
WUUS54 KBRO 270149
SVRBRO
TXC427-270230-
/O.NEW.KBRO.SV.W.0087.120727T0149Z-120727T0230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
849 PM CDT THU JUL 26 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN STARR COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 930 PM CDT

* AT 849 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF 
PRODUCING DESTRUCTIVE 70 MPH WINDS...7 MILES WEST OF ROMA...MOVING 
NORTH AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE...
  FRONTON.
  SALINENO.
  FALCON DAM.
  FALCON HEIGHTS.

THIS STORM WILL ALSO BE CAPABLE OF HAIL TO THE SIZE OF PENNIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WIND GUSTS TO 60 MPH OR MORE WILL CAUSE SOME STRUCTURAL DAMAGE...
MAINLY TO TREES AND POWER LINES. POORLY ANCHORED ROOFS...MOBILE
HOMES...AND SHEDS ARE ALSO AT RISK.

&&

LAT...LON 2656 9917 2663 9907 2650 9889 2639 9901
      2641 9903 2639 9908 2643 9912 2647 9910
      2649 9910 2652 9913 2653 9916 2655 9918
TIME...MOT...LOC 0149Z 201DEG 13KT 2646 9911

$$

JGG

2 follow-up statements

076 
WWUS54 KBRO 270211
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
911 PM CDT THU JUL 26 2012

TXC427-270230-
/O.CON.KBRO.SV.W.0087.000000T0000Z-120727T0230Z/
STARR-
911 PM CDT THU JUL 26 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM CDT
FOR WESTERN STARR COUNTY...

AT 910 PM CDT...RADAR CONTINUED TO INDICATE A LARGE SEVERE 
THUNDERSTORM FROM JUST WEST OF ROMA...TO 3 MILES SOUTHEAST OF 
SALINENO...MOVING NORTH AT 15 MPH. THIS STORM REMAINS CAPABLE OF 
DAMAGING WINDS TO 60 MPH.

LOCATIONS IN THE WARNING INCLUDE...
  FRONTON...ROMA...SALINENO...AND HIGHWAY 281.


LAT...LON 2652 9913 2661 9905 2650 9889 2639 9901
      2641 9903 2639 9908 2643 9912 2647 9910
      2649 9910
TIME...MOT...LOC 0210Z 206DEG 13KT 2648 9904

$$

JGG

781 
WWUS54 KBRO 270226
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
926 PM CDT THU JUL 26 2012

TXC427-270236-
/O.EXP.KBRO.SV.W.0087.000000T0000Z-120727T0230Z/
STARR-
926 PM CDT THU JUL 26 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN STARR COUNTY WILL
EXPIRE AT 930 PM CDT...

AT 926 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THE 
THUNDERSTORM HAD WEAKENED AND WAS NO LONGER SEVERE...THUS THE WARNING
HAS BEEN ALLOWED TO EXPIRE. VERY HEAVY RAINFALL WILL REMAIN POSSIBLE 
WITH THIS STORM AS IT MOVES BETWEEN ROMA AND FALCON ON HIGHWAY 281 
AND TOWARDS EL SAUZ.


LAT...LON 2652 9913 2661 9905 2650 9889 2639 9901
      2641 9903 2639 9908 2643 9912 2647 9910
      2649 9910
TIME...MOT...LOC 0226Z 206DEG 13KT 2653 9901

$$

JGG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 9:43 PM CDT	Areal Flood Advisory	BRO	Starr	62 min
Jul 27, 12:28 AM CDT	Areal Flood Advisory	BRO	Starr	62 min
Jul 27, 1:55 AM CDT	Areal Flood Advisory	BRO	Jim Hogg	65 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning 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.