Alert archive / Texas / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 54, NWS Austin/San Antonio, TX

May 6, 2003Blanco County, Kendall County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 6, 2003, 8:27 AM CDT for Blanco County, Kendall 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: May 6, 2003, 8:27 AM CDT (13:27 UTC)
Expired: May 6, 2003, 9:30 AM CDT
In force: 63 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

Counties Blanco County, TX, Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 72 km from the middle of the area, began a volume at 13:30 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, 1.5 hours before the alert went out and 227 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: 5257 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 779 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 4.7
Supercell composite: 20.1

Open this sounding in Storm Lab

The text

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

817 
WUUS54 KEWX 061327
SVRSAT
TXC031-259-061430-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
825 AM CDT TUE MAY 6 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  BLANCO
  KENDALL

* UNTIL 930 AM CDT

* AT 825 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTHEAST OF COMFORT...OR ABOUT 8 MILES
  NORTHWEST OF BOERNE...MOVING NORTHEAST AT 25 MPH. ANOTHER SEVERE 
  STORM WAS LOCATED NEAR KENDALIA MOVING NORTHEAST AT 25 MPH.

VERY LARGE HAIL IS POSSIBLE WITH THESE SEVERE THUNDERSTORMS. IF YOU 
ARE IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.


LAT...LON 2977 9874 2991 9892 3013 9877 3014 9859
          3032 9859 3041 9850 3020 9825

$$

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 May 6, 7:20 AM CDT, 1 hour 7 minutes earlier.

Area forecast discussion, May 6, 7:20 AM CDT, 1 hour 7 minutes before

SOUTH CENTRAL TEXAS FORECAST DISCUSSION UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
720 AM CDT TUE MAY 6 2003

UPDATED FORECASTS FOR THIS MORNING TO SHOW POSSIBLE SHOWERS
AND THUNDERSTORMS EASTERN HILL COUNTRY...EAST TO PARTS OF
CENTRAL TEXAS...WITH ISOLATED MORNING SHOWERS OVER THE EAST
PART OF SOUTH CENTRAL TEXAS.  AS S/W TROF PASSES NE OF AREA
PARTLY CLOUDY SKIES EXPECTED FOR THE AFTERNOON.  CONTD
20 PCT CHC OF SHRA OR TSRA EXTREME EAST AND NORTHEAST PART
OF AREA INT HE AFTERNOON.  EXPECT WARM DAY AGAIN TODAY AND
WEDNESDAY.  CONTINUE WARM AND HUMID WEDNESDAY THRU FRIDAY.
S/W TROFS MOVING FROM ROCKIES TO GREAT PLAINS STATES WEDNESDAY
THROUGH FRIDAY WILL MAKE FOR A LITTLE MORE MARITIME AIRMASS OVER S
CNTRL TX WED THRU FRI VERSUS YESTERDAY AND TODAY.  BY SATURDAY
STRONG WX SYSTEM ALOFT MOVES OUT OF ROCKIES TO GREAT PLAINS STATES.
WILL SHOW ISOLD SHRA/TSRA FRI NIGHT NW TO EXTREME NORTH PART OF CWA
WITH THIS PATTERN.  BY SUNDAY AS STRONG WX SYSTEM MOVES
EAST...HEIGHT FIELD OVER S CNTRL TX SHOW RISK OF GRADUAL WEAKENING
AND FORECASTS SHOW POSSIBLE FRONT JUST NORTH OR NORTHEAST OF THE
AREA.  THESE FEATURES MAY ALLOW POPS TO DRIFT NEAR EARLY TO MID MAY
NORMALS FOR SUNDAY AND MONDAY.  AS A RESULT WILL SHOW LOW POPS WITH
THIS PATTERN FOR NOW.  BY THE MID TO LATE PART OF NEXT WEEK POPS
BEGAN TO FALL BACK AGAIN AS NORTHERN EDGE OF SUBTROPICAL HIGH SLOWLY
INCREASES OVER AREA...AS INDICATED BY COMPOSITE SOLUTIONS OF MEDIUM
RANGE FORECASTS.

PRELIMS...
AUS 093/074 093/074 092 21000
DRT 102/074 099/075 100 00000
SAT 094/075 092/075 092 10000

.EWX...NONE.

08/11/PM

Hazardous weather outlook, May 6, 6:00 AM CDT, 2 hours 27 minutes before

TXZ171>173-183>194-202>209-217>225-228-071100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 AM CDT TUE MAY 6 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...
ISOLATED THUNDERSTORMS ARE POSSIBLE ACROSS THE NORTHEASTERN QUARTER
OF SOUTH CENTRAL TEXAS LATER THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT ANTICIPATED.

In the hours before

Special weather statement, May 6, 7:20 AM CDT, 1 hour 7 minutes before

TXZ171>173-186>194-205>209-220>225-061400-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
720 AM CDT TUE MAY 6 2003

...SCATTERED SHOWERS AND THUNDERSTORMS OVER THE EASTERN
HILL COUNTRY MOVING NORTHEAST TO PARTS OF CENTRAL TEXAS...

SCATTERED SHOWERS AND THUNDERSTORMS HAVE FORMED OVER THE
EASTERN HILL COUNTRY...MOVING NORTHEAST AT 35 MPH.
THESE SHOWERS AND THUNDERSTORMS WILL AFFECT PARTS OF THE
EASTERN HILL COUNTRY AND ADJACENT PARTS OF CENTRAL TEXAS
IN THE NEXT 1 TO 2 HOURS.  THE SHOWERS AND THUNDERSTORMS
WERE MOVING TOWARD PARTS OF LLANO...BURNET...WESTERN HAYS...
WESTERN TRAVIS...AND WILLIAMSON COUNTIES.  SOME HAIL...OCCASIONAL
LIGHTNING...AND GUSTY WIND IS POSSIBLE WITH THE STRONGER
THUNDERSTORMS.

FURTHER SOUTH FROM NEAR SAN ANTONIO TO NEAR SEGUIN AND SCHULENBURG
ISOLATED SHOWERS ARE POSSIBLE IN THE NEXT 1 TO 2 HOURS.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 11:46 AM CDT	Severe Thunderstorm Warning	EWX	Kerr	59 min
May 6, 1:21 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Real	54 min
May 6, 2:28 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee	62 min
May 6, 3:34 PM CDT	Severe Thunderstorm Warning	EWX	Fayette	56 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.