Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 76, NWS Brownsville, TX

May 12, 2012Willacy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at May 12, 2012, 4:03 PM CDT for Willacy County, Texas. It was in force for 42 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 12, 2012, 4:03 PM CDT (21:03 UTC)
Expired: May 12, 2012, 4:45 PM CDT
In force: 42 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

County Willacy County, TX

The radar

The Brownsville radar (KBRO), 70 km from the middle of the area, began a volume at 21:04 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.

What was reported inside it

Time	Report	Where	Remark
May 12, 4:06 PM CDT	HAIL 0.88	E Raymondville, TX	NICKLE SIZE HAIL NEAR RAYMONDVILLE ABOUT 2 MILES EAST OF HWY 77
May 12, 4:25 PM CDT	HAIL 1	1 N Raymondville, TX	PUBLIC REPORTED QUARTER SIZE HAIL ON NORTH SIDE OF RAYMONDVILLE
May 12, 4:25 PM CDT	HAIL 1	7 N Raymondville, TX	EMERGENCY MANAGER REPORTED QUARTER SIZE HAIL NEAR YTURRIA
May 12, 4:34 PM CDT	HAIL 0.88	Raymondville, TX	PUBLIC VIA BROADCAST METEOROLOGIST REPORTED NICKEL SIZE HAIL AT THE CORNER OF 1ST AND TAMPICO

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 9.1 hours before the alert went out and 72 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: 3455 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 477 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.5

Open this sounding in Storm Lab

The text

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

107 
WUUS54 KBRO 122103
SVRBRO
TXC489-122145-
/O.NEW.KBRO.SV.W.0076.120512T2103Z-120512T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
403 PM CDT SAT MAY 12 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL 445 PM CDT

* AT 404 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL AND
  DAMAGING 60 MPH WINDS...OVER RAYMONDVILLE...MOVING WEST AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  YTURRIA.
  RAYMONDVILLE.
  LYFORD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS CONTAIN WIND GUSTS OF 60 MPH OR HIGHER...AND
HAIL THE SIZE OF QUARTERS OR LARGER. MOVE TO A PLACE OF SAFETY.

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.

QUARTER SIZE HAIL IS LIKELY. MOVE INDOORS IMMEDIATELY.

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 2642 9764 2638 9786 2643 9786 2643 9790
      2659 9783 2659 9759
TIME...MOT...LOC 2104Z 075DEG 9KT 2648 9777

$$

61

1 follow-up statement

401 
WWUS54 KBRO 122136
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
436 PM CDT SAT MAY 12 2012

TXC489-122145-
/O.CON.KBRO.SV.W.0076.000000T0000Z-120512T2145Z/
WILLACY-
436 PM CDT SAT MAY 12 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR WESTERN WILLACY COUNTY...

AT 425 PM CDT...THE PUBLIC REPORTED QUARTER SIZE HAIL NORTH SIDE OF 
RAYMONDVILLE.

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE
THUNDERSTORM WAS NOW OVER RAYMONDVILLE...MOVING WEST AT 10 MPH.

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

THE SEVERE THUNDERSTORM IS ALSO CAPABLE OF PRODUCING...
  QUARTER SIZE HAIL.
  60 MPH WIND GUSTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LEAVE MOBILE HOMES FOR A STURDY BUILDING. IF OUTSIDE AND THERE IS NO
STURDY BUILDING NEARBY...MOVE TO A DITCH OR LOW SPOT...BUT WATCH FOR
RISING WATERS.

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 2642 9764 2638 9786 2643 9786 2643 9790
      2659 9783 2659 9759
TIME...MOT...LOC 2133Z 069DEG 7KT 2648 9780

$$

61

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 7:06 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	39 min
May 11, 10:50 PM CDT	Areal Flood Advisory	BRO	Zapata	55 min
May 12, 1:42 AM CDT	Areal Flood Advisory	BRO	Zapata	63 min
May 12, 2:13 AM CDT	Severe Thunderstorm Warning	BRO	Zapata	62 min
May 12, 2:28 AM CDT	Flash Flood Warning	BRO	Zapata	92 min
May 12, 3:12 AM CDT	Severe Thunderstorm Warning	BRO	Zapata	63 min
May 12, 3:58 AM CDT	Flash Flood Warning	BRO	Zapata	92 min
May 12, 4:50 PM CDT	Severe Thunderstorm Warning	BRO	Willacy	40 min
May 12, 4:57 PM CDT	Areal Flood Advisory	BRO	Willacy	63 min
May 12, 5:20 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	25 min
May 12, 5:24 PM CDT	Areal Flood Advisory	BRO	Cameron, Hidalgo, Willacy	66 min
May 12, 5:43 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	32 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.