Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 135, NWS Austin/San Antonio, TX

July 23, 2003Gillespie County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 23, 2003, 2:03 PM CDT for Gillespie County, Texas. It was in force for 57 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 23, 2003, 2:03 PM CDT (19:03 UTC)
Expired: Jul 23, 2003, 3:00 PM CDT
In force: 57 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), 121 km from the middle of the area, began a volume at 19:05 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, 7.1 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-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: 3092 J/kg
Mixed-layer CIN: -47 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -37 m²/s²
0-3 km storm-relative helicity: 38 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 231903
SVRSAT
TXC171-232000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
203 PM CDT WED JUL 23 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 300 PM CDT

* AT 203 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 15 MILES NORTHEAST OF HARPER...OR ABOUT 15
  MILES NORTHWEST OF FREDERICKSBURG...MOVING SOUTH AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  RURAL GILLESPIE COUNTY AT 220 PM

LARGE HAIL AND DAMAGING WINDS ARE 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.


LAT...LON 3050 9930 3018 9927 3016 9864 3048 9865

$$

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 23, 12:05 PM CDT, 1 hour 58 minutes earlier.

Area forecast discussion, Jul 23, 12:05 PM CDT, 1 hour 58 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1205 PM CDT WED JUL 23 2003

OUTFLOW BNDRY FROM NORTH AND NORTHEAST CONTINUES TO MOVE SOUTH AND
SOUTHWEST...CAUSING AN INCREASING CHC OF RAIN FROM SHRA AND TSRA.
INCREASED CHC OF RAIN IN 1205 PM ZONE FORECAST UPDATE...AND CONTD
SOME PSBLY SVR EAST PART OF CWA FOR THE AFTN AND PSBLY PART OF EARLY
EVE.

THURSDAY WEATHER PATTERN CONTINUES TO SHOW HIGH ALOFT BUILDING OVER
AREA FROM THE WEST AND NORTHWEST...WITH SOME MARGINAL INSTABILITY
OVER THE EAST PART OF SOUTH CENTRAL TEXAS.  WILL CONT TO SHOW A SLGT
CHANCE OF SHRA/TSRA FOR EAST AND SOUTHEAST PART OF SOUTH CENTRAL
TEXAS FOR THURSDAY.   08/01/WR

PREVIOUS DISCUSSION...
NEW MESO ETA INDICATES WEAK FRONT WILL REMAIN NORTH OF CWA AND THEN
DISSIPATE.  FOCUS FOR PRECIP WILL BE MCS AND ATTENDANT OUTFLOW
BOUNDARIES MOVING DOWN FROM NE TEXAS.  WILL MAINTAIN POPS AS
PREVIOUSLY MENTIONED.

MESO ETA AND GFS HAVE WEAK FRONT SAGGING SOUTH INTO NE CWA BY NOON
AND INTO CENTRAL ZONES BY LATE AFTERNOON.  FRONT BECOMES DIFFUSE
TONIGHT.  WILL GO WITH SPC OUTLOOK AND INCLUDE SOME SEVERE
THUNDERSTORMS POSSIBLE EAST AND CENTRAL THIS AFTERNOON AND EVENING
WITH DOWN BURST WINDS THE MAIN THREAT.  POPS LIMITED TO SEA BREEZE
ACTIVITY MAINLY SE THURSDAY THROUGH TUESDAY.  TEMPS A BIT COOLER
MAINLY NORTH NEXT COUPLE OF DAYS WITH VALUES CLOSE TO MAV GUIDANCE.
BACK TO NEAR SEASONAL NORMALS FRIDAY.

PRELIMS...
AUS 090 069 095 070 6100
DRT 097 074 098 076 2200
SAT 091 073 094 074 5100

.EWX...NONE.

3/6

Hazardous weather outlook, Jul 23, 5:22 AM CDT, 8 hours 41 minutes before

TXZ171>173-183>194-202>209-217>225-228-241100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
522 AM CDT WED JUL 23 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS
LATE THIS AFTERNOON AND THIS EVENING. THE THREAT AREA IS ALONG AND
EAST OF A LINE FROM  CUERO TO SAN ANTONIO TO  LBJ STATE PARK TO
GRANGER LAKE.  THE THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE
DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 11:24 AM CDT	Severe Thunderstorm Warning	EWX	Lee	51 min
Jul 23, 12:05 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop	40 min
Jul 23, 1:26 PM CDT	Severe Thunderstorm Warning	EWX	Blanco	64 min
Jul 23, 2:39 PM CDT	Severe Thunderstorm Warning	EWX	Kendall	51 min
Jul 23, 3:09 PM CDT	Severe Thunderstorm Warning	EWX	Bandera	66 min
Jul 23, 3:18 PM CDT	Severe Thunderstorm Warning	EWX	Real	57 min
Jul 23, 4:44 PM CDT	Flash Flood Warning	EWX	Val Verde	2 hr
Jul 23, 4:51 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Uvalde	54 min

Nearby

Severe Thunderstorm Warnings in Texas, 2003 Every 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.