Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 102, NWS Austin/San Antonio, TX

July 2, 2002Frio County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 2, 2002, 9:32 PM CDT for Frio County, Texas. It was in force for 58 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: Jul 2, 2002, 9:32 PM CDT (02:32 UTC)
Expired: Jul 2, 2002, 10:30 PM CDT
In force: 58 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Frio County, TX

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

Del Rio, TX (KDRT), launched 00:00Z, 2.5 hours before the alert went out and 170 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: 3349 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 6.2

Open this sounding in Storm Lab

The text

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

484 
WUUS54 KEWX 030232
SVRSAT
TXC163-030330-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
930 PM CDT TUE JUL 2 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  FRIO

* UNTIL 1030 PM CDT

* AT 930 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER FRIO TOWN AND PEARSALL...MOVING VERY  
  SLOWLY SOUTH.

LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM ALONG WITH VERY 
HEAVY RAIN...DAMAGING WINDS AND DEADLY LIGHTNING. IF YOU ARE IN THE 
PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A 
SUBSTANTIAL SHELTER.

LAT...LON 2906 9933 2873 9937 2873 9887 2905 9893

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 Austin/San Antonio, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 2, 9:00 PM CDT, 32 minutes earlier.

Area forecast discussion, Jul 2, 9:00 PM CDT, 32 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
900 PM CDT TUE JUL 2 2002

CURRENT WEATHER ANALYSIS AND OUTLOOK...
THE CONVECTIVE SHOWER AND THUNDERSTORM ACTIVITY OVER THE COUNTIES
ALONG THE ESCARPMENT AND INTO THE HILL COUNTRY ARE REDEVELOPING AS
EXPECTED. THIS WILL CONTINUE THE ONGOING FLOODING PROBLEMS THROUGH
THE NIGHT.

THE TROPICAL AIRMASS OVER THE FORECAST WARNING COUNTY AREA WILL
SLOWLY DRIFT WESTWARD OVER THE NEXT 24 HOURS. THIS PLACES THE WESTERN
COUNTIES UNDER THE MAIN THREAT OF FLOODING...SIMILAR TO THE FLOODING
THAT IS AND HAS OCCURRED OVER THE CENTRAL AND EASTERN COUNTIES.

WE HAVE ONLY FOUR COUNTIES NOW UNDER A FLASH FLOOD WARNING.
TWO HOURS AGO IT WAS EIGHTEEN COUNTIES. ALL RIVERS AND CREEKS ACROSS
THE CENTRAL SECTIONS OF THE FORECAST WARNING AREA ARE EITHER RISING
AND/OR IN FLOOD. THE FLASH FLOOD WATCH THAT IS IN EFFECT FOR THE
ENTIRE FORECAST WARNING AREA THROUGH THE NIGHT WILL MOST LIKELY BE
RE-ISSUED AND EXTENDED THROUGH WEDNESDAY.

THE 4PM ZONE FORECAST HAS THIS SITUATION HANDLED OK.
SEE NO SIGNIFICANT CHANGES NEEDED...BUT WILL RE-ISSUE AN UPDATED
FORECAST...ADJUSTING TEMPS.

PREVIOUS DISCUSSION...
FLASH FLOOD WATCH WILL CONTINUE TONIGHT.  THE FLASH FLOOD WATCH
WILL LIKELY BE REISSUED WEDNESDAY MORNING AND THE THREAT AREA
REDEFINED WESTWARD.

THE MCS THAT HAS BEEN OVER THE HILL COUNTY THIS MORNING AND
AFTERNOON IS WEAKENING AFTER DUMPING 6 TO 12 INCHES ACROSS UVALDE
COUNTY.  HOWEVER ADDITIONAL SHOWERS AND THUNDERSTORMS ARE FORMING
ACROSS THE EASTERN CWFA...JUST EAST OF THE DECAYING MCS.  THESE
STORMS WILL TRAIN NORTHWARD FROM THE COASTAL BEND.  THIS AREA...FROM
SAN ANTONIO TO AUSTIN AND BURNET EASTWARD...WILL HAVE THE GREATEST
RISK OF FLASH FLOODING FOR THE REMAINDER OF THIS AFTERNOON INTO THIS
EVENING.

THE ETA/MESOETA WILL BE THE BASIS FOR THIS FCST.  IT SLOWLY MOVES
THE UPPER LOW AND ASSOCIATED TROF AXIS SOUTHWESTWARD INTO MEXICO BY
THURSDAY NIGHT.  THIS MEANS THE HEAVY RAINS WILL SLOWLY SHIFT
WESTWARD TO THE CENTRAL AND WESTERN COUNTIES WEDNESDAY...WITH RAINS
DIMINISHING OVER THE EASTERN COUNTIES.  RAIN CHANCES WILL DIMINISH
BUT CONTINUE THURSDAY AND FRIDAY AS DAYTIME HEATING INTERACTS WITH
THE RESIDUAL TROPICAL AIRMASS.

PRELIMS...
AUS 073/084 073/088 073 74220
DRT 074/085 075/088 075 76640
SAT 073/085 074/089 074 85320

.EWX...FLASH FLOOD WATCH FOR THE ENTIRE CWA TONIGHT.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 2, 7:45 PM CDT	Flash Flood Warning	EWX	Bexar, Medina	4 hr
Jul 2, 8:23 PM CDT	Flash Flood Warning	EWX	Kendall	3 hr
Jul 2, 8:30 PM CDT	Flash Flood Warning	EWX	Frio	3 hr
Jul 2, 10:50 PM CDT	Flash Flood Warning	EWX	Dimmit, Zavala	3 hr
Jul 2, 11:27 PM CDT	Flash Flood Warning	EWX	Bandera, Bexar, Medina	4 hr
Jul 3, 1:57 AM CDT	Flash Flood Warning	EWX	Dimmit, Zavala	4 hr
Jul 3, 3:05 AM CDT	Flash Flood Warning	EWX	Atascosa, Bandera, Bexar, Blanco, Comal, Frio and 2 more	4 hr
Jul 3, 5:12 AM CDT	Flash Flood Warning	EWX	Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 9 more	7 hr
Jul 3, 9:06 AM CDT	Flash Flood Warning	EWX	Burnet, Williamson	3 hr
Jul 3, 9:47 AM CDT	Flash Flood Warning	EWX	Real	2 hr
Jul 3, 11:51 AM CDT	Flash Flood Warning	EWX	Dimmit, Zavala	3 hr
Jul 3, 11:54 AM CDT	Flash Flood Warning	EWX	Burnet, Williamson	3 hr
Jul 3, 12:46 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	59 min
Jul 3, 1:16 PM CDT	Flash Flood Warning	EWX	Bandera, Medina	119 min
Jul 3, 2:38 PM CDT	Flash Flood Warning	EWX	Kendall, Kerr	3 hr
Jul 3, 2:52 PM CDT	Flash Flood Warning	EWX	Real, Uvalde	3 hr
Jul 3, 3:19 PM CDT	Flash Flood Warning	EWX	Bandera, Medina	2 hr
Jul 3, 5:38 PM CDT	Flash Flood Warning	EWX	Comal	3 hr

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.