Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 48, NWS Brownsville, TX

April 20, 2012Hidalgo County, Willacy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Apr 20, 2012, 6:11 PM CDT for Hidalgo County, Willacy County, Texas. It was in force for 29 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: Apr 20, 2012, 6:11 PM CDT (23:11 UTC)
Expired: Apr 20, 2012, 6:40 PM CDT
In force: 29 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

Counties Hidalgo County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 76 km from the middle of the area, began a volume at 23:11 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
Apr 20, 2:29 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 11.2 hours before the alert went out and 78 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: 1336 J/kg
Mixed-layer CIN: -192 J/kg
Mixed-layer LCL: 742 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 151 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

544 
WUUS54 KBRO 202311
SVRBRO
TXC215-489-210000-
/O.NEW.KBRO.SV.W.0048.120420T2311Z-120421T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
611 PM CDT FRI APR 20 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH EASTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS.
  WESTERN WILLACY COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 700 PM CDT

* AT 611 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING GOLF BALL SIZE HAIL AND
  DAMAGING 60 MPH WINDS...12 MILES WEST OF LASARA...MOVING SOUTHEAST
  AT 45 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RED GATE.
  HARGILL.
  LASARA.
  RAYMONDVILLE.
  LYFORD.

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 2634 9779 2634 9782 2645 9816 2651 9815
      2662 9807 2657 9773 2637 9769
TIME...MOT...LOC 2311Z 294DEG 40KT 2650 9804

$$

JGG

3 follow-up statements

692 
WWUS54 KBRO 202321
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
621 PM CDT FRI APR 20 2012

TXC215-489-210000-
/O.CON.KBRO.SV.W.0048.000000T0000Z-120421T0000Z/
HIDALGO-WILLACY-
621 PM CDT FRI APR 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR WESTERN WILLACY AND EASTERN HIDALGO COUNTIES...

AT 621 PM CDT NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM 3 MILES WEST OF LASARA...MOVING EAST AT
45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  HARGILL.
  LASARA.
  STOCKHOLM.
  LYFORD.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  GOLFBALL SIZE HAIL...WITH POSSIBLE DAMAGE.

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 2634 9779 2634 9782 2644 9811 2650 9811
      2659 9804 2657 9773 2637 9769
TIME...MOT...LOC 2321Z 289DEG 37KT 2646 9794

$$

JGG

015 
WWUS54 KBRO 202329
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
629 PM CDT FRI APR 20 2012

TXC215-489-210000-
/O.CON.KBRO.SV.W.0048.000000T0000Z-120421T0000Z/
HIDALGO-WILLACY-
629 PM CDT FRI APR 20 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR WESTERN WILLACY AND EASTERN HIDALGO COUNTIES...

AT 629 PM CDT NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM 2 MILES SOUTHEAST OF LASARA...MOVING
EAST AT 45 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  RANCHETTE ESTATES.
  LYFORD.
  RAYMONDVILLE.

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  GOLFBALL SIZE HAIL...WITH POSSIBLE DAMAGE.

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 2634 9779 2634 9782 2641 9799 2647 9797
      2658 9795 2657 9773 2637 9769
TIME...MOT...LOC 2329Z 289DEG 37KT 2644 9784

$$

JGG

238 
WWUS54 KBRO 202340
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
640 PM CDT FRI APR 20 2012

TXC215-489-202350-
/O.CAN.KBRO.SV.W.0048.000000T0000Z-120421T0000Z/
HIDALGO-WILLACY-
640 PM CDT FRI APR 20 2012

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN WILLACY AND EASTERN
HIDALGO COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED TO BELOW SEVERE 
LIMITS.

LAT...LON 2634 9779 2634 9782 2641 9799 2647 9797
      2658 9795 2657 9773 2637 9769
TIME...MOT...LOC 2340Z 289DEG 37KT 2640 9772

$$

JGG

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 3:54 AM CDT	Small Craft Advisory	BRO		42 hr
Apr 20, 3:54 AM CDT	Small Craft Advisory for Winds	BRO		30 hr
Apr 20, 3:09 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Jim Hogg	51 min
Apr 20, 3:57 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Jim Hogg, Starr	48 min
Apr 20, 4:12 PM CDT	Tornado Warning	BRO	Jim Hogg	10 min
Apr 20, 4:14 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	46 min
Apr 20, 4:18 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	42 min
Apr 20, 4:36 PM CDT	Areal Flood Advisory	BRO	Brooks	114 min
Apr 20, 4:37 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	38 min
Apr 20, 4:38 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	52 min
Apr 20, 4:58 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy	47 min
Apr 20, 5:04 PM CDT	Special Marine Warning	BRO		2 hr
Apr 20, 5:08 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	52 min
Apr 20, 5:16 PM CDT	Severe Thunderstorm Warning	BRO	Kenedy, Willacy	27 min
Apr 20, 5:17 PM CDT	Areal Flood Advisory	BRO	Hidalgo, Starr	118 min
Apr 20, 5:20 PM CDT	Areal Flood Advisory	BRO	Kenedy	115 min
Apr 20, 5:27 PM CDT	Tornado Warning	BRO	Willacy	14 min
Apr 20, 5:30 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	45 min
Apr 20, 5:40 PM CDT	Severe Thunderstorm Warning	BRO	Willacy	50 min
Apr 20, 5:53 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo	52 min
Apr 20, 5:56 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo	24 min
Apr 20, 6:18 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	42 min
Apr 20, 6:30 PM CDT	Areal Flood Advisory	BRO	Cameron, Willacy	2 hr
Apr 20, 6:30 PM CDT	Tornado Warning	BRO	Cameron	30 min
Apr 20, 6:56 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	49 min
Apr 20, 6:57 PM CDT	Tornado Warning	BRO	Cameron	12 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.