Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 41, NWS Brownsville, TX

October 20, 20024 counties in Texas

NWS Brownsville, TX issued this severe thunderstorm warning at Oct 20, 2002, 6:17 PM CDT for 4 counties in Texas. It was in force for 88 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, 6:17 PM CDT (23:17 UTC)
Expired: Oct 20, 2002, 7:45 PM CDT
In force: 88 min
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

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

The radar

The Brownsville radar (KBRO), 20 km from the middle of the area, began a volume at 23:19 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, 11.3 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: 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.

000 
WUUS54 KBRO 202317
SVRBRO
TXC061-215-261-489-210000-

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

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CAMERON COUNTY IN DEEP SOUTH TEXAS
  WILLACY COUNTY IN DEEP SOUTH TEXAS
  SOUTHERN KENEDY COUNTY IN DEEP SOUTH TEXAS
  EASTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS

* UNTIL 700 PM CDT

* AT 607 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR RAYMONDVILLE...MOVING EAST AT 20 MPH. THIS
  SEVERE THUNDERSTORM WILL LIKELY PRODUCE HAIL TO THE SIZE OF
  QUARTERS... AND WINDS IN EXCESS OF 60 MPH.

* THE SEVERE THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF...  
  WILLACY AND CAMERON COUNTIES.                                    

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

LAT...LON 2662 9799 2627 9793 2631 9737 2665 9748

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, 5:24 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo, Willacy	81 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, 6:38 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.