Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 9, NWS Brownsville, TX

May 12, 2011Kenedy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 12, 2011, 4:11 PM CDT for Kenedy County, Texas. It was in force for 19 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 12, 2011, 4:11 PM CDT (21:11 UTC)
Expired: May 12, 2011, 4:30 PM CDT
In force: 19 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Kenedy County, TX

The radar

The Brownsville radar (KBRO), 94 km from the middle of the area, began a volume at 21:14 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 12, 7:52 AM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 9.2 hours before the alert went out and 96 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: 2604 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 470 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 39 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

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

053 
WUUS54 KBRO 122111
SVRBRO
TXC261-122145-
/O.NEW.KBRO.SV.W.0009.110512T2111Z-110512T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
411 PM CDT THU MAY 12 2011

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN KENEDY COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 445 PM CDT

* AT 411 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND
  DAMAGING 60 MPH WINDS...OVER CENTRAL KENEDY COUNTY...MOVING
  SOUTHEAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  NORIAS.
  RUDOLPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 2660 9790 2675 9789 2687 9783 2681 9750
      2680 9749 2660 9746
TIME...MOT...LOC 2111Z 296DEG 21KT 2677 9779

$$

59

1 follow-up statement

376 
WWUS54 KBRO 122130
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
430 PM CDT THU MAY 12 2011

TXC261-122141-
/O.CAN.KBRO.SV.W.0009.000000T0000Z-110512T2145Z/
KENEDY-
430 PM CDT THU MAY 12 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN KENEDY COUNTY IS
CANCELLED...

AT 431 PM CDT...NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE
THUNDERSTORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO LONGER
SEVERE...THUS THE WARNING HAS BEEN CANCELLED.

DOPPLER RADAR INDICATED THAT HEAVY RAIN...SMALL HAIL...AND GUSTY
WINDS WERE STILL POSSIBLE FROM THE THUNDERSTORM.

STAY TUNED TO LOCAL MEDIA OUTLETS FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.


LAT...LON 2660 9790 2675 9789 2687 9783 2681 9750
      2680 9749 2660 9746
TIME...MOT...LOC 2131Z 296DEG 21KT 2672 9767

$$

59

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 2:34 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	26 min
May 12, 2:46 PM CDT	Areal Flood Advisory	BRO	Brooks	59 min
May 12, 3:00 PM CDT	Special Marine Warning	BRO		2 hr
May 12, 3:02 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	28 min
May 12, 3:17 PM CDT	Flash Flood Warning	BRO	Brooks	63 min
May 12, 3:27 PM CDT	Areal Flood Advisory	BRO	Kenedy	63 min
May 12, 3:29 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	46 min
May 12, 3:35 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	40 min
May 12, 4:25 PM CDT	Areal Flood Advisory	BRO	Kenedy	65 min
May 12, 4:30 PM CDT	Areal Flood Advisory	BRO	Willacy	60 min
May 12, 4:55 PM CDT	Special Marine Warning	BRO		2 hr
May 12, 5:07 PM CDT	Areal Flood Advisory	BRO	Hidalgo	53 min
May 12, 6:50 PM CDT	Special Marine Warning	BRO		85 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011 Every severe thunderstorm warning 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.