Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 39, NWS Brownsville, TX

October 20, 2002Cameron County, Hidalgo County, Willacy County, Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Oct 20, 2002, 5:24 PM CDT for Cameron County, Hidalgo County, Willacy County, Texas. It was in force for 81 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: Oct 20, 2002, 5:24 PM CDT (22:24 UTC)
Expired: Oct 20, 2002, 6:45 PM CDT
In force: 81 min
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

Counties Cameron County, TX, Hidalgo County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 41 km from the middle of the area, began a volume at 22:26 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, 10.4 hours before the alert went out and 42 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: 1974 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

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

091 
WUUS54 KBRO 202224
SVRBRO
TXC061-215-489-202330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
523 PM CDT SUN OCT 20 2002

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

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

* UNTIL 630 PM CDT

* AT 522 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR PORT MANSFIELD...MOVING SOUTH AT 15 MPH.
  THIS SEVERE THUNDERSTORM WILL LIKELY PRODUCE HAIL TO THE SIZE OF
  NICKELS... AND WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
   SEBASTIAN BY 535 PM CDT.
   SANTA ROSA BY 555 PM CDT.
   COMBES BY 605 PM CDT.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE ADVANCE
WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE
SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED.

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE.

LAT...LON 2660 9738 2652 9789 2623 9789 2625 9722

PHILO

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 19, 7:37 PM CDT	Severe Thunderstorm Warning	BRO	Brooks, Kenedy	68 min
Oct 19, 8:16 PM CDT	Severe Thunderstorm Warning	BRO	Brooks	21 hr
Oct 20, 4:17 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo	103 min
Oct 20, 4:29 PM CDT	Tornado Warning	BRO	Kenedy	31 min
Oct 20, 4:32 PM CDT	Special Marine Warning	BRO		58 min
Oct 20, 4:32 PM CDT	Special Marine Warning	BRO		58 min
Oct 20, 5:02 PM CDT	Tornado Warning	BRO	Kenedy, Willacy	28 min
Oct 20, 5:06 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo, Willacy	84 min
Oct 20, 5:29 PM CDT	Tornado Warning	BRO	Hidalgo	31 min
Oct 20, 5:41 PM CDT	Special Marine Warning	BRO		2 hr
Oct 20, 5:51 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Willacy	69 min
Oct 20, 6:17 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo, Kenedy, Willacy	88 min
Oct 20, 6:38 PM CDT	Tornado Warning	BRO	Cameron	37 min
Oct 20, 6:58 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	47 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.