Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 18, NWS Brownsville, TX

June 25, 2002Hidalgo County, Starr County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Jun 25, 2002, 7:40 PM CDT for Hidalgo County, Starr County, Texas. It was in force for 50 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: Jun 25, 2002, 7:40 PM CDT (00:40 UTC)
Expired: Jun 25, 2002, 8:30 PM CDT
In force: 50 min
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

Counties Hidalgo County, TX, Starr County, TX

The radar

The Brownsville radar (KBRO), 134 km from the middle of the area, began a volume at 00:39 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Brownsville Intl, TX (KBRO), launched 00:00Z, 0.7 hours before the alert went out and 137 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: 1640 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1209 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: 5 m²/s²
Significant tornado parameter: -0.2
Supercell composite: -1.8

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KBRO 260040
SVRBRO
TXC215-427-260130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
739 PM CDT TUE JUN 25 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

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

* UNTIL 830 PM CDT

* AT 727 PM CDT... A SEVERE THUNDERSTORM 10 MILES SOUTH OF LA
  GLORIA...OR 15 MILES NORTHWEST OF MCCOOK...MOVING SOUTHWEST AT 15
  MPH. THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE DIME SIZE HAIL...
  AND WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   SULLIVAN CITY BY 810 PM CDT.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER
AWAY FROM WINDOWS. REMEMBER...SEVERE THUNDERSTORMS PRODUCE LARGE
DAMAGING HAIL...DAMAGING WINDS...FREQUENT CLOUD TO GROUND
LIGHTNING...AND VERY HEAVY RAIN.

LAT...LON 2656 9836 2669 9870 2646 9900 2626 9855

PHILO

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Brownsville, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 25, 7:30 PM CDT, 10 minutes earlier.

Area forecast discussion, Jun 25, 7:30 PM CDT, 10 minutes before

DEEP SOUTH TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BROWNSVILLE TX
730 PM CDT TUE JUN 25 2002

.DISCUSSION...SVR WX ALONG SEA BREEZE ATTM. UPDATED HIDALGO AND
BROOKS FOR TSTMS.

.MARINE...5H LOW NOW OVER THE ARKLATX AREA WILL EVENTUALLY DEVOLVE
INTO A WEAKNESS OVER DEEP SOUTH TEXAS TOWARD THE END OF THE WEEK AS
RIDGING SIMULTANEOUSLY BUILDS OVER THE SOUTHWEST. MODERATE SOUTH TO
SOUTHEAST WINDS WILL PREVAIL OVER THE LOWER TEXAS COASTAL WATERS AS
THE BERMUDA HIGH CONTINUES TO EXHIBIT STRENGTH INTO THE GULF OF
MEXICO. MORE PERSISTENT ISOLATED SHOWERS COULD DEVELOP BEGINNING
WEDNESDAY NIGHT AS INCREASED INSTABILITY WORKS SOUTH DOWN THE TEXAS
COAST ALONG AN ELONGATING SHEAR AXIS. SOME CONCERN BY THE WEEKEND AS
AN INVERTED UPPER TROUGHING SETS UP OVER THE EAST COAST OF
MEXICO...SPARKING CONVECTION IN THE BAY OF CAMPECHE AND SOUTHWEST
GULF. UPPER WINDS MAY BE MORE CONDUCIVE TO ALLOWING SOME CONVECTION
TO WORK NORTH INTO THE COASTAL WATERS FOR FRIDAY THROUGH SUNDAY. THE
AVN SEEMS TO LATCH ONTO THIS IDEA WITH THE BEST SHOT AT SOME
SCATTERED SHOWERS OVER THE COASTAL WATERS FOR SATURDAY AND SUNDAY.
NOGAPS ENSEMBLE SUPPORTS THIS SOLUTION.

SYNOPTIC-AVIATION-MARINE...PHILO (58) / MESO...VEGA

INTERNET ADDRESS...WWW.SRH.NOAA.GOV/BRO

.BRO...SVR 252 AND 253 THRU 745 PM.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:00 PM CDT	Severe Thunderstorm Warning	BRO	Hidalgo, Starr	45 min
Jun 26, 4:15 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	45 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every severe thunderstorm warning in 2002

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.