Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 239, NWS San Angelo, TX

July 28, 2002Tom Green County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Jul 28, 2002, 9:12 PM CDT for Tom Green County, Texas. It was in force for 63 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 28, 2002, 9:12 PM CDT (02:12 UTC)
Expired
Jul 28, 2002, 10:15 PM CDT
In force
63 min
Issued by
NWS San Angelo, TX
Area
Counties, with a storm outline in the text

County Tom Green 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

Midland Regional, TX (KMAF), launched 00:00Z, 2.2 hours before the alert went out and 189 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-pSkew-T log-p diagram, Midland Regional, TX at 00:00Z on 2002-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 670 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 00:00Z on 2002-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
670 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
2995 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

962 
WUUS54 KSJT 290212
SVRSJT
TXC451-290315-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
ISSUED BY NWS MIDLAND/ODESSA TX
911 PM CDT SUN JUL 28 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN TOM GREEN COUNTY IN SOUTHWEST TEXAS

* UNTIL 1015 PM CDT

* AT 911 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 16 MILES SOUTH OF SAN ANGELO...MOVING SOUTHEAST AT
  15 MPH.

* SOME LOCATIONS AFFECTED BY THE STORM INCLUDE...
  CHRISTOVAL

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WINDS AND LARGE HAIL.
GO INSIDE A STURDY BUILDING AND STAY AWAY FROM WINDOWS.

LAT...LON 3144 10015 3143 10063 3113 10063 3113 10017

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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 28, 1:45 PM CDT, 7 hours 27 minutes earlier.

Area forecast discussion, Jul 28, 1:45 PM CDT, 7 hours 27 minutes before
WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
145 PM CDT SUN JUL 28 2002

...FORECAST CHALLENGE WILL BE THUNDERSTORM CHANCES THROUGH TUESDAY...

.CURRENT...LATEST RADAR TRENDS INDICATE SHOWERS AND THUNDERSTORMS
DEVELOPING OVER THE WESTERN PORTIONS OF THE FORECAST AREA EARLY THIS
AFTERNOON AS SHORT WAVE BEGINS TO WORK ITS WAY INTO THE AREA.
MOISTURE IS STILL HERE WITH DEWPOINTS AT 1 PM REMAINING IN THE UPPER
60S TO LOWER 70S WITH WELL MIXED ATMOSPHERE.

.SHORT TERM...SHORT WAVE TROUGH WORKS INTO THE AREA. THUS EXPECT
THUNDERSTORMS CURRENTLY FORM TO INCREASE IN AREAL COVERAGE THROUGH
THE AFTERNOON AND EARLY EVENING. THUNDERSTORMS MAY DISSIPATE SOME
AFTER SUNSET...HOWEVER WITH THE LOW LEVEL JET IN PLACE AGAIN TONIGHT
CANT RULE OUT THUNDERSTORMS SURVIVING THROUGH THE NIGHT. THINK THE
BEST COVERAGE OF SCATTERED VARIETY WILL BE FROM THE CONCHO VALLEY
NORTHWARD INTO THE BIG COUNTRY. WITH ISOLATED COVERAGE AT BEST
ELSEWHERE. THE WINDS HAVE BEEN RATHER BREEZY ACROSS THE AREA TODAY
AND EXPECT THIS TO CONTINUE INTO THE EVENING HOURS...THUS WILL ADD
CAUTION ON AREA LAKES TO THE ZONES.

.MONDAY THROUGH TUESDAY...AS THE SHORTWAVE TROUGH PASSES BY THE
SOUTHERN END IS FORECAST TO GET LEFT BEHIND...THUS LEAVING A
WEAKNESS IN THE RIDGE THROUGH TUESDAY. PLAN ON LEAVING SCATTERED
POPS ACROSS THE NORTH TAPERING TO ISOLATED BY TUESDAY. ACROSS THE
SOUTH...CURRENT ISOLATED MENTION LOOKS TO BE GOOD AND WILL KEEP.
TEMPERATURES WILL BE A LITTLE COOLER DUE TO THE CLOUDS AND SOME
PRECIP AROUND.

.WEDNESDAY THROUGH SUNDAY...LOOKS LIKE THE RIDGE WILL TAKE OVER ON
WEDNESDAY...THUS WILL PULL THE CURRENT SLIGHT CHANCE IN FORECAST.
HOWEVER THURSDAY THROUGH SUNDAY...THE RIDGE GRADUALLY BUILDS INTO
THE CENTRAL PLAINS LEAVING WEST CENTRAL TEXAS ON THE SOUTHERN
PERIPHERY OF THIS FEATURE AND GIVING US HOPE FOR AN EASTERLY WAVE.
MODELS ALSO INDICATE A FAIRLY WEAK CAP STRENGTH WITH 700MB
TEMPERATURES ONLY RUNNING 8C OR BELOW THURSDAY THROUGH SUNDAY. WITH
ALL THAT SAID WILL NOT PUT RAIN CHANCES IN JUST YET THAT FAR
OUT...BUT MAY HAVE TO IN LATER FORECASTS.

ABI 075/093/073/093 3332
SJT 076/094/072/094 3332
JCT 075/093/073/093 2222

.SJT...CAUTION ON AREA LAKES THIS EVENING.

27/BRAZZELL

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 7:32 PM CDTFlash Flood WarningSJTTom Green3 hr
Jul 28, 8:03 PM CDTSevere Thunderstorm WarningSJTTom Green57 min
Jul 28, 8:40 PM CDTSevere Thunderstorm WarningSJTJones, Taylor35 min
Jul 28, 9:02 PM CDTFlash Flood WarningSJTIrion3 hr
Jul 28, 9:46 PM CDTFlash Flood WarningSJTCoke59 min
Jul 28, 10:01 PM CDTSevere Thunderstorm WarningSJTTom Green29 min
Jul 28, 10:13 PM CDTFlash Flood WarningSJTCoke, Tom Green107 min
Jul 29, 11:45 AM CDTSevere Thunderstorm WarningSJTCoke60 min
Jul 29, 1:18 PM CDTFlash Flood WarningSJTTom Green4 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2002Every 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.