Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 144, NWS Austin/San Antonio, TX

August 8, 2003Gillespie County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Aug 8, 2003, 5:51 PM CDT for Gillespie County, Texas. It was in force for 54 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
Aug 8, 2003, 5:51 PM CDT (22:51 UTC)
Expired
Aug 8, 2003, 6:45 PM CDT
In force
54 min
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Gillespie County, TX

The radar

The Austin/San Antonio radar (KEWX), 114 km from the middle of the area, began a volume at 22:54 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

Del Rio, TX (KDRT), launched 12:00Z, 10.9 hours before the alert went out and 206 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, Del Rio, TX at 12:00Z on 2003-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1111 joules per kilogram.LCLLFCEL10008507005003002001001 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, Del Rio, TX at 12:00Z on 2003-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -108 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
1111 J/kg
Mixed-layer CIN
-185 J/kg
Mixed-layer LCL
1998 m above ground
0-6 km bulk shear
2 kt
0-1 km storm-relative helicity
-108 m²/s²
0-3 km storm-relative helicity
-80 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.

000 
WUUS54 KEWX 082251
SVRSAT
TXC171-082345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
548 PM CDT FRI AUG 8 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 645 PM CDT

* AT 548 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A     
  SEVERE THUNDERSTORM 7 MILES NORTHEAST OF WILLOW CITY ...MOVING     
  SOUTHWEST AT 20 MPH.  THE STORM MAY TRACK OVER FREDERICKSBURG
  AROUND 620 PM. 

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


LAT...LON 3019 9922 3019 9864 3046 9863 3047 9924

$$

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 Aug 8, 2:30 PM CDT, 3 hours 21 minutes earlier.

Area forecast discussion, Aug 8, 2:30 PM CDT, 3 hours 21 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
230 PM CDT FRI AUG 8 2003

NEXT 7 DAYS IS A GRADUAL TRANSITION.  THE UPPER HIGH NEAR THE
TEXAS/NEW MEXICO BORDER IS NUDGED WEST AND NORTH AS PROGRESSIVE
SYSTEMS RIDE OVER THE RIDGE AND BLEND WITH THE EASTERN U.S.
TROUGH.  THE RESULT IS A RETROGRADING TROUGH, PUTTING BETTER UPPER
DYNAMICS OVER CENTRAL TEXAS FOR THE REST OF THE WEEKEND.  AN UPPER
LOW PINCHES OFF FROM THE MEAN TROUGH AND IS PUSHED WEST THROUGH
SOUTH CENTRAL TEXAS BY THE BUILDING BERMUDA RIDGE. LOOKS LIKE A GOOD
TROPICAL TAP IN STORE FOR THE LATTER PART OF NEXT WEEK WITH TEMPS
RETURNING TO SEASONAL NORMALS.

ALL AVAILABLE MODELS IMPLY MCCS DEVELOPING ALONG THE SURFACE
BOUNDARY AND DROPPING SOUTH ACROSS THE EASTERN HALF OF CWA.
GRADUALLY THE SFC BOUNDARY WORKS INTO THE HILL COUNTRY MONDAY GIVING
ALL AREAS A CHANCE OF RW/TRW. THE FULL TROPICAL TAP PROGGED FOR
WEDNESDAY THROUGH FRIDAY WILL BRING AMPLE RAIN TO ALL AREAS.

ONE MORE HOT DAY THEN TEMPS GRADUALLY RETURN TO SEASONAL NORMALS.

RECORDS FOR SATURDAY
AUS    106  1962
ATT    106  1953
SAT    106  1953
DRT    107  1953

.EWX...NONE.

NUMBERS...
AUS 77 102 77 96 75      23233
DRT 78 105 79 99 78      02122
SAT 78 101 78 96 77      12233

06/02
Hazardous weather outlook, Aug 8, 5:49 AM CDT, 12 hours 2 minutes before
TXZ171>173-183>194-202>209-217>225-228-091100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
549 AM CDT FRI AUG 8 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT...
HAZARDOUS WEATHER IS NOT EXPECTED TODAY AND TONIGHT.
ISOLATED SUMMERTIME HEATING SHOWERS POSSIBLE THIS AFTERNOON
AND EVENING.

ANOTHER HOT EARLY AUGUST DAY IS EXPECTED TODAY.  THE HIGH EARLY
AUGUST SUN WILL ADD TO THE HEAT...ESPECIALLY IN THE LATE MORNING TO
THE AFTERNOON.

HIGHS TODAY ARE EXPECTED TO BE AROUND 100 TO 105 OVER THE EAST PART
OF SOUTH CENTRAL TEXAS AND AROUND 100 TO 106 OVER WEST PARTS OF
SOUTH CENTRAL TEXAS.  THIS IS AROUND 5 TO 10 DEGREES ABOVE NORMAL
FOR EARLY AUGUST.  HEAT INDEX READINGS WILL REACH BETWEEN 100 AND
114 IN THE HOT PART OF THE AFTERNOON.

COMPLICATIONS FROM HEAT EXPOSURE CAN BE AVOIDED OR MINIMIZED BY
USE OF HATS TO PROTECT FROM THE SUN...USE OF LIGHT COLORED AND
LIGHTWEIGHT CLOTHING...USE OF WATER OR OTHER NON-ALCOHOLIC
BEVERAGES...AVOIDING OUTSIDE WORK IN THE HOTTEST PART OF THE
DAY...AND AVOIDING POORLY VENTILATED AREAS.

OVERNIGHT LOWS ARE EXPECTED TO BE IN THE MID TO UPPER 70S
TONIGHT...PROVIDING SOME BREAK FROM THE HOT DAYS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.
WIDELY SCATTERED MAINLY AFTERNOON AND EVENING SHOWERS OR
THUNDERSTORMS MAY FORM IN THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 8, 5:04 PM CDTSevere Thunderstorm WarningEWXBexar41 min
Aug 8, 5:52 PM CDTSevere Thunderstorm WarningEWXCaldwell, Gonzales53 min
Aug 8, 6:41 PM CDTSevere Thunderstorm WarningEWXGonzales34 min

Nearby

Severe Thunderstorm Warnings in Texas, 2003Every severe thunderstorm warning in 2003

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.