Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 49, NWS Brownsville, TX

August 12, 2003Cameron County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Aug 12, 2003, 3:04 PM CDT for Cameron 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: Aug 12, 2003, 3:04 PM CDT (20:04 UTC)
Expired: Aug 12, 2003, 3:45 PM CDT
In force: 41 min
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

County Cameron County, TX

The radar

The Brownsville radar (KBRO), 20 km from the middle of the area, began a volume at 20:04 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.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 12:00Z, 8.1 hours before the alert went out and 22 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: 2173 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 711 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

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

549 
WUUS54 KBRO 122004 CCA
SVRBRO
TXC061-122045-

BULLETIN - EAS ACTIVATION REQUESTED...CORRECTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
258 PM CDT TUE AUG 12 2003

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL 345 PM CDT

* AT 258 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM. THIS STORM WAS LOCATED NEAR SAN BENITO      
  AND MOVING SOUTH AT 20 MPH.

* THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING WINDS TO 60 MPH    
  AND HAIL THREE QUARTERS OF AN INCH IN DIAMETER. THE STORM WILL BE  
  AFFECTING AREAS FROM SAN BENITO SOUTH TO THE MEXICAN BORDER...
  INCLUDING OLMITO AS WELL AS WESTERN AND CENTRAL BROWNSVILLE.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD 
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... 
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

LAT...LON 2612 9772 2599 9772 2574 9734 2605 9741
          2617 9749

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 2:15 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	45 min
Aug 12, 2:20 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	10 min
Aug 12, 3:01 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	44 min
Aug 12, 3:58 PM CDT	Tornado Warning	BRO	Cameron	32 min
Aug 12, 6:45 PM CDT	Severe Thunderstorm Warning	BRO	Starr, Zapata	60 min
Aug 12, 6:48 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Hidalgo	57 min

Nearby

Severe Thunderstorm Warnings in Texas, 2003 Every severe thunderstorm warning in 2003

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.