Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 136, NWS Austin/San Antonio, TX

July 23, 2003Kendall County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Jul 23, 2003, 2:39 PM CDT for Kendall County, Texas. It was in force for 51 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, 2:39 PM CDT (19:39 UTC)
Expired: Jul 23, 2003, 3:30 PM CDT
In force: 51 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 70 km from the middle of the area, began a volume at 19:40 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, 7.7 hours before the alert went out and 222 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.

873 
WUUS54 KEWX 231939
SVRSAT
TXC259-232030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
237 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...
  KENDALL

* UNTIL 330 PM CDT

* AT 237 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 8 MILES NORTHWEST OF KENDALIA...OR ABOUT 10
  MILES WEST OF BLANCO...MOVING SOUTHWEST AT 35 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  OVER SISTERDALE AT 250 PM
  OVER WARING AT 255 PM

DAMAGING WINDS AND LARGE HAIL ARE POSSIBLE WITH THIS SEVERE 
THUNDERSTORM.  THIS STORM PRODUCED DAMAGING WINDS EARLIER IN BLANCO 
COUNTY.   

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE 
FOR DAMAGING WINDS IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY 
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY 
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.


LAT...LON 3012 9860 2996 9847 2977 9874 3010 9890

$$

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, 2:15 PM CDT, 24 minutes earlier.

Area forecast discussion, Jul 23, 2:15 PM CDT, 24 minutes before

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

OUTFLOW BNDRY EXPECTED TO CONTINUE MOVING S AND SW ACROSS SOUTH
CNTRL TEXAS LATE THIS AFTERNOON AND IN THE EVENING HOURS HAS
POTENTIAL TO TRIGGER SCT SHRA/TSRA THRU THE EVE HOURS.  WILL
SHOW CHC OF SHRA/TSRA IN THE EVE OVR PARTS OF S CNTRL TX...WITH
LIMITED TO NIL CHC OF SHRA OVER FAR NE PART OF CWA...OR PARTS OF
CNTRL TX...IN WAKE OF BOUNDARY.  FURTHER WEST TOWARD RIO GRANDE
WILL KEEP CHC OF SHRA THRU 12Z.

THE THURSDAY WEATHER PATTERN SHOWS MORE STABLE CONDITIONS OVER
MOST OF S CNTRL TX...EXCPET FOR THE SE PART OF THE AREA...WHERE
SOME MARGINAL INSTABILITY LINGERS...AND IN THE LATE AFTN TO EARLY
EVENING ALONG RIO GRANDE...WHERE MONSOON SUMMER AFFECTS TO THE
WEST MAY DRIFT FAR ENOUGH EAST.

FOR FRIDAY AND SATURDAY...AVERAGE OF FCSTS IN TIME SHOW RIDGE
ALOFT GETTING STRONGER OVER S CNTRL TX...EXCEPT FOR EAST TO SE PART
OF THE AREA WHERE SLGT CHC OF SHRA LINGERS.

ON SUNDAY...MEDIUM RANGE FORECASTS CONT TO SHOW WEAKNESS IN HEIGHT
FIELD VCNTY 700 TO 300 HPA EVOLVING OVER EAST HALF OF CWA...AS
SUBTLE WX SYS ALOFT PASSES TO THE SOUTH AND THEN SW OF CWA.
THIS PATTERN LINGERS INTO MONDAY...SO WILL SHOW SLGT CHC OF SHRA
OVER EAST HALF OF AREA SUNDAY AND MONDAY.  THE TUESDAY FORECASTS
SHOW MODERATE LATE JULY RIDGE ALOFT OVER THE AREA...THAT CONTINUES
ON WEDNESDAY...WITH SIGNS OF WEAKENING POSSIBLY FROM THE EAST
AND NORTHEAST.  COMPOSITE FORECATS IN TIME SHOW LIMITING CHC OF
RAIN TUESDAY AND WEDNESDAY...SO FOR NOW WILL LEAVE OUT CHC OF
RAIN TUESDAY AND WEDNESDAY...EXCPET FOR FAR SE PART OF CWA ON
WEDNESDAY...WHERE SOME SEABREEZE/MESO SCALE INTERACTIONS MAY
CAUSE ISOLD SHRA.

AFTN HIGHS CONTINUE TO LOOK LIMITING FOR A LATE JULY SETTING SO
WILL ADJUST THEM TO FIT THE JULY 2003 WEATHER PATTERNS.

PRELIMS...
AUS 070 095 072 096 072 00000
DRT 073 095 076 097 078 31200
SAT 073 091 075 092 076 30000

.EWX...NONE.

08/01/13/PM

Hazardous weather outlook, Jul 23, 2:15 PM CDT, 24 minutes before

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

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
215 PM 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 THIS AFTERNOON AND
EVENING. THE THREAT AREA IS ALONG AND WEST OF A LINE FROM PLEASANTON
TO SAN ANTONIO TO BURNET.  THE THUNDERSTORMS WILL HAVE THE POTENTIAL
TO PRODUCE DAMAGING WINDS AND LARGE HAIL.

.DAYS TWO THROUGH SEVEN...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

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, 2:03 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie	57 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.