Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 1, NWS Brownsville, TX

February 4, 2012Cameron County, Willacy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Feb 4, 2012, 2:41 PM CST for Cameron County, Willacy County, Texas. It was in force for 64 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: Feb 4, 2012, 2:41 PM CST (20:41 UTC)
Expired: Feb 4, 2012, 3:45 PM CST
In force: 64 min
Issued by: NWS Brownsville, TX
Area: Storm-based polygon

Counties Cameron County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 59 km from the middle of the area, began a volume at 20:42 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 12:00Z, 8.7 hours before the alert went out and 61 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: 1984 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

694 
WUUS54 KBRO 042041
SVRBRO
TXC061-489-042145-
/O.NEW.KBRO.SV.W.0001.120204T2041Z-120204T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
241 PM CST SAT FEB 4 2012

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CAMERON COUNTY IN DEEP SOUTH TEXAS.
  EASTERN WILLACY COUNTY IN DEEP SOUTH TEXAS.

* UNTIL 345 PM CST

* AT 241 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS...CAPABLE OF PRODUCING QUARTER SIZE
  HAIL AND DAMAGING 60 MPH WINDS...FROM 12 MILES SOUTHWEST OF PORT
  MANSFIELD TO 21 MILES SOUTHWEST OF PORT MANSFIELD...MOVING
  SOUTHEAST AT 10 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  PORFIRIO BY 240 PM CST.
  PORT MANSFIELD BY 250 PM CST.
  SANTA MONICA BY 255 PM CST.
  RIO HONDO BY 330 PM CST.

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 2622 9755 2631 9773 2659 9773 2658 9742
      2656 9743 2655 9741
TIME...MOT...LOC 2041Z 312DEG 9KT 2643 9758 2633 9767

$$

61

1 follow-up statement

053 
WWUS54 KBRO 042118
SVSBRO

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
318 PM CST SAT FEB 4 2012

TXC061-489-042145-
/O.CON.KBRO.SV.W.0001.000000T0000Z-120204T2145Z/
CAMERON-WILLACY-
318 PM CST SAT FEB 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM CST
FOR EASTERN WILLACY AND NORTHERN CAMERON COUNTIES...

AT 317 PM CST...THE PUBLIC REPORTED FOUR FUNNEL CLOUDS DEVELOPED 
BETWEEN THE CITIES OF RAYMONDVILLE IN WILLACY COUNTY AND RIO HONDO
IN CAMERON COUNTY.

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS
WERE NOW ALONG A LINE EXTENDING FROM 13 MILES SOUTHWEST OF PORT
MANSFIELD TO 4 MILES NORTHEAST OF HARLINGEN VALLEY AIRPORT...MOVING
SOUTHEAST AT 10 MPH.

THE SEVERE THUNDERSTORMS ARE ALSO CAPABLE OF PRODUCING...
  QUARTER SIZE HAIL.
  60 MPH WIND GUSTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS LINE OF STORMS.

MOVE INTO A STURDY BUILDING 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 2622 9755 2631 9773 2659 9773 2658 9742
      2656 9743 2655 9741
TIME...MOT...LOC 2117Z 312DEG 9KT 2637 9751 2627 9760

$$

TOMASELLI/CASTILLO

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 4, 4:53 AM CST	Small Craft Advisory	BRO		46 hr
Feb 4, 4:53 AM CST	Small Craft Advisory for Winds	BRO		34 hr
Feb 4, 2:27 PM CST	Areal Flood Advisory	BRO	Kenedy, Willacy	63 min
Feb 4, 3:45 PM CST	Areal Flood Advisory	BRO	Cameron, Willacy	60 min
Feb 4, 3:46 PM CST	Severe Thunderstorm Warning	BRO	Cameron, Willacy	59 min
Feb 4, 5:19 PM CST	Areal Flood Advisory	BRO	Cameron	56 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.