Alert archive / Texas / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 53, NWS Austin/San Antonio, TX

April 18, 2006Kendall County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 18, 2006, 10:00 PM CDT for Kendall County, Kerr County, Texas. It was in force for 60 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: Apr 18, 2006, 10:00 PM CDT (03:00 UTC)
Expired: Apr 18, 2006, 11:00 PM CDT
In force: 60 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

Counties Kendall County, TX, Kerr County, TX

The radar

The Austin/San Antonio radar (KEWX), 92 km from the middle of the area, began a volume at 03:02 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 00:00Z, 3.0 hours before the alert went out and 204 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 4910 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 9 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 190300
SVREWX
TXC259-265-190400-
/O.NEW.KEWX.SV.W.0053.060419T0300Z-060419T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1000 PM CDT TUE APR 18 2006

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES...
  KERR
  KENDALL

* UNTIL 1100 PM CDT

* AT 956 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES
  SOUTHWEST OF BANKERSMITH...AND MOVING EAST AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

LAT...LON 3013 9906 2997 9908 2998 9859 3014 9863

$$

2 follow-up statements

000 
WWUS54 KEWX 190313
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1013 PM CDT TUE APR 18 2006

TXC259-265-190400-
/O.CON.KEWX.SV.W.0053.000000T0000Z-060419T0400Z/
KERR TX-KENDALL TX-
1013 PM CDT TUE APR 18 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR KENDALL AND KERR COUNTIES...

AT 1007 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL. 
THIS STORM WAS LOCATED 7 MILES SOUTHWEST OF BANKERSMITH...OR ABOUT 
NEAR COMFORT...MOVING SOUTHEAST AT 5 MPH. LOCALLY HEAVY DOWNPOURS UP 
TO 2 INCHES MAY BE POSSIBLE IF THESE STORMS CONTINUE TO MOVE AT THIS 
SLOW PACE.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

LAT...LON 3013 9906 2997 9908 2998 9859 3014 9863

$$

000 
WWUS54 KEWX 190332
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1029 PM CDT TUE APR 18 2006

TXC265-190339-
/O.CAN.KEWX.SV.W.0053.000000T0000Z-060419T0400Z/
KERR TX-
1029 PM CDT TUE APR 18 2006

...THE SEVERE THUNDERSTORM WARNING FOR KERR COUNTY IS CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS SINCE MOVED INTO 
KENDALL COUNTY.

LAT...LON 3013 9892 3013 9863 3011 9862 3008 9862
      3006 9860 2999 9859 2999 9891 2998 9892

$$

TXC259-190400-
/O.CON.KEWX.SV.W.0053.000000T0000Z-060419T0400Z/
KENDALL TX-
1029 PM CDT TUE APR 18 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1100 PM CDT
FOR KENDALL COUNTY...

AT 1024 PM CDT...A SEVERE THUNDERSTORM WAS REPORTED CAPABLE OF
PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED NEAR
BANKERSMITH...OR ABOUT 7 MILES NORTHEAST OF COMFORT...MOVING EAST AT 
10 MPH ACROSS THE NORTHERN ONE-THIRD OF KENDALL COUNTY.

THE SEVERE THUNDERSTORM WILL ALSO PRODUCE ISOLATED RAINFALL AMOUNTS 
IN EXCESS OF 1 INCH OVER AREAS NORTH OF SISTERDALE AND COMFORT.
 
LAT...LON 3013 9892 3013 9863 3011 9862 3008 9862
      3006 9860 2999 9859 2999 9891 2998 9892

$$

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 Apr 18, 9:56 PM CDT, 4 minutes earlier.

Area forecast discussion, Apr 18, 9:56 PM CDT, 4 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
956 PM CDT TUE APR 18 2006

.UPDATE...
SEVERE WATCH WAS CANCELLED AS SATELLITE IMAGERY SHOWS WARMING
CLOUD TOPS. A FEW THUNDERSTORMS COULD FORM INTO THE OVERNIGHT
HOURS WITH CONTINUED LOW LEVEL SHEAR AND CONVECTIVE ACTIVITY
OCCURRING OVER MEXICO SOUTHWEST OF LAREDO. OTHERWISE CURRENT
FORECAST IS GENERALLY ON TRACK.

&&

.PREV DISCUSSION... (ISSUED ISSUED BY NATIONAL WEATHER SERVICE BROWNSVILLE TX)

DISCUSSION...
RECORD HEAT AND THE DRY LINE MAY HAVE THE SIDE EFFECT OF SOME
BRIEF BORDERLINE SEVERE WEATHER THIS AFTERNOON. LIFTED INDICES
OF -6 RUNNING FROM DRT TO BURNET AND CAPE FROM 1500-2000 IN THE
HILL COUNTRY AHEAD OF THE SLOWLY ADVANCING DRYLINE. CONVECTIVE
INHIBITION IS STILL FAIRLY STRONG...BUT TEMPS IN THE MID TO UPPER
90S ARE GETTING CLOSE TO BREAKING THE CAP. TCU NOTED ON LATEST VIS
IMAGERY ALONG THE DRYLINE FROM JCT TO MASON. RIGHT NOW FEEL THAT
CAP IS A BIT TOO STRONG FOR A LARGE NUMBER OF CELLS...BUT A FEW
SHOULD BE ABLE TO POP THROUGH AND BRIEFLY GO SEVERE WITH THE MAIN
THREAT BEING WIND GUSTS AND HAIL. FRONT/DRYLINE PUSHES FURTHER
INTO TEXAS ON WEDNESDAY BEFORE RETREATING WEDNESDAY NIGHT. AS IT
RETREATS...A VORT MAX SWEEPS THROUGH OVERHEAD. THIS WILL ADD LIFT
AND SPARK SOME SHOWER AND THUNDERSTORM ACTIVITY. SOUTHWEST FLOW
ALOFT WILL CONTINUE TO BRING IN VORTS DURING THE WEEKEND INTO
EARLY NEXT WEEK...BRINGING A SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS. HAVE NOT YET GONE WHOLEHEARTEDLY WITH POPS AFTER
THURSDAY ATTM UNTIL WE CAN SIGNIFICANTLY BREAK THIS DRY PATTERN.

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

18/02

Hazardous weather outlook, Apr 18, 6:30 PM CDT, 3 hours 30 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
ISSUED BY NATIONAL WEATHER SERVICE BROWNSVILLE TX
630 PM CDT TUE APR 18 2006

TXZ171>173-183>194-202>209-217>225-228-191100-
ATASCOSA-BANDERA-BASTROP-BEXAR-BLANCO-BURNET-CALDWELL-COMAL-DE WITT-
DIMMIT-EDWARDS-FAYETTE-FRIO-GILLESPIE-GONZALES-GUADALUPE-HAYS-KARNES-
KENDALL-KERR-KINNEY-LAVACA-LEE-LLANO-MAVERICK-MEDINA-REAL-TRAVIS-
UVALDE-VAL VERDE-WILLIAMSON-WILSON-ZAVALA-
630 PM CDT TUE APR 18 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TONIGHT.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 11 PM CDT TONIGHT FOR
THE COUNTIES OF ZAVALA...UVALDE...REAL...KERR...BANDERA...MEDINA
...GILLESPIE...KENDALL...BEXAR...COMAL...HAYS...BLANCO...LLANO...
BURNET...WILLIAMSON...TRAVIS...LEE...AND BASTROP...AS SOME SEVERE
THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS ARE POSSIBLE. NO
OTHER HAZARDOUS WEATHER IS EXPECTED.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

SHOWERS AND THUNDERSTORMS ARE EXPECTED EACH DAY DURING THE PERIOD.
SOME OF THE THUNDERSTORMS MAY BECOME SEVERE...PRODUCING LARGE HAIL
AND DAMAGING WINDS. NO OTHER HAZARDOUS WEATHER IS ANTICIPATED FOR
THE PERIOD.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION IS REQUESTED THIS EVENING DUE TO THE
SEVERE WEATHER OCURRING AT THIS TIME.

TOMASELLI

In the hours before

Local storm report, Apr 18, 7:07 PM CDT, 2 hours 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
707 PM CDT TUE APR 18 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0500 PM     HAIL             14 NE HARPER            30.44N 99.08W
04/18/2006  M2.75 INCH       GILLESPIE          TX   LAW ENFORCEMENT

            BASEBALL SIZE HAIL IN DOSS.

0605 PM     HAIL             30 W MOUNTAIN HOME      30.17N 99.87W
04/18/2006  M1.00 INCH       EDWARDS            TX   TRAINED SPOTTER

            ONE INCH HAIL 10 MILES N OF JUNCTION OF HWYS 41 AND 83 ON
            HWY 83.

0644 PM     HAIL             MOUNTAIN HOME           30.17N 99.37W
04/18/2006  M1.75 INCH       KERR               TX   LAW ENFORCEMENT

&&

DC

Local storm report, Apr 18, 7:52 PM CDT, 2 hours 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
752 PM CDT TUE APR 18 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0721 PM     HAIL             12 SE HARPER            30.18N 99.11W
04/18/2006  M1.75 INCH       GILLESPIE          TX   TRAINED SPOTTER

0740 PM     HAIL             LEANDER                 30.56N 97.86W
04/18/2006  M2.00 INCH       WILLIAMSON         TX   LAW ENFORCEMENT

            NAMELESS ROAD AND ROUND MOUNTAIN ROAD. MOSTLY 1/2 TO 3/4
            HAIL, A FEW 2 INCH STONES.

&&

COOEWX

Local storm report, Apr 18, 9:07 PM CDT, 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
907 PM CDT TUE APR 18 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0730 PM     HAIL             LEANDER                 30.56N 97.86W
04/18/2006  M1.25 INCH       WILLIAMSON         TX   PUBLIC

0747 PM     HAIL             MOUNTAIN HOME           30.17N 99.37W
04/18/2006  M4.25 INCH       KERR               TX   TRAINED SPOTTER

0800 PM     HAIL             ROUND ROCK              30.52N 97.67W
04/18/2006  M1.75 INCH       WILLIAMSON         TX   PUBLIC

0806 PM     HAIL             10 WSW JOHNSON CITY     30.22N 98.56W
04/18/2006  M0.75 INCH       BLANCO             TX   PUBLIC

            BLANCO AND GILLESPIE COUNTY LINE ON HWY 290.

&&

DC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 18, 7:09 PM CDT	Severe Thunderstorm Warning	EWX	Burnet	36 min
Apr 18, 7:22 PM CDT	Flash Flood Warning	EWX	Kerr	3 hr
Apr 18, 7:28 PM CDT	Severe Thunderstorm Warning	EWX	Travis, Williamson	62 min
Apr 18, 7:35 PM CDT	Severe Thunderstorm Warning	EWX	Blanco	55 min
Apr 18, 7:55 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie	65 min
Apr 18, 8:09 PM CDT	Severe Thunderstorm Warning	EWX	Kendall	51 min
Apr 18, 8:18 PM CDT	Flash Flood Warning	EWX	Blanco	3 hr
Apr 18, 8:27 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Hays, Travis, Williamson	63 min
Apr 18, 8:59 PM CDT	Severe Thunderstorm Warning	EWX	Comal	61 min
Apr 18, 9:59 PM CDT	Severe Thunderstorm Warning	EWX	Travis	28 min
Apr 18, 11:02 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Kendall	58 min

Nearby

Severe Thunderstorm Warnings in Texas, 2006 Every severe thunderstorm warning in 2006

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.