Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 131, NWS Austin/San Antonio, TX

May 14, 2008Lee County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 14, 2008, 11:12 PM CDT for Lee County, Texas. It was in force for 18 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 14, 2008, 11:12 PM CDT (04:12 UTC)
Expired: May 14, 2008, 11:30 PM CDT
In force: 18 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

County Lee County, TX

The radar

The Ft Hood radar (KGRK), 52 km from the middle of the area, began a volume at 04:15 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 14, 7:50 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 4.2 hours before the alert went out and 266 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: 726 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 1.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 150412
SVREWX
TXC287-150430-
/O.NEW.KEWX.SV.W.0131.080515T0412Z-080515T0430Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1112 PM CDT WED MAY 14 2008

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN LEE COUNTY...

* UNTIL 1130 PM CDT.

* AT 1111 PM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS STORM
  WAS LOCATED NEAR LEXINGTON...AND MOVING EAST AT 24 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  8 MILES NORTHWEST OF DIME BOX BY 1130 PM CDT...

A TORNADO WATCH IS IN EFFECT. SEVERE THUNDERSTORMS CAN PRODUCE
TORNADOES.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT THURSDAY MORNING
FOR SOUTH CENTRAL TEXAS.

LAT...LON 3029 9681 3035 9715 3048 9715 3055 9701
      3057 9699 3056 9695 3053 9690 3050 9689
      3048 9690 3041 9680
TIME...MOT...LOC 0412Z 270DEG 21KT 3045 9700

$$

1 follow-up statement

000 
WWUS54 KEWX 150428
SVSEWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1128 PM CDT WED MAY 14 2008

TXC287-150438-
/O.EXP.KEWX.SV.W.0131.000000T0000Z-080515T0430Z/
LEE TX-
1128 PM CDT WED MAY 14 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN LEE COUNTY WILL
EXPIRE AT 1130 PM CDT...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT THURSDAY MORNING
FOR SOUTH CENTRAL TEXAS.

LAT...LON 3029 9681 3035 9715 3048 9715 3055 9701
      3057 9699 3056 9695 3053 9690 3050 9689
      3048 9690 3041 9680
TIME...MOT...LOC 0428Z 265DEG 23KT 3049 9689

$$

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 14, 8:44 PM CDT, 2 hours 28 minutes earlier.

Area forecast discussion, May 14, 8:44 PM CDT, 2 hours 28 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
844 PM CDT WED MAY 14 2008

.DISCUSSION...
ADJUSTED THUNDERSTORMS POSSIBILITIES PER MESO TRENDS FROM
21Z TO 01Z AND INPUT FROM VARIOUS SHORT TERM SOLUTIONS AND
00Z 925 TO 200 HPA MAPS.  AREA OF THUNDERSTORMS WILL
CONTINUE TO INCREASE ACROSS THE HILL COUNTRY AND ADJACENT
PARTS OF CENTRAL TEXAS TONIGHT.  SOME OF THESE STORMS
WILL CONTINUE TO BE SEVERE.  FURTHER SOUTH...AND AREA
OF THUNDERSTORMS EAST OF EAGLE PASS TO SOUTH OF
SAN ANTONIO WILL CONTINUE TO DEVELOP EASTWARD IN THE
NEXT FEW HOURS.  BELIEVE THE CONVECTION WILL BECOME
MORE WIDESPREAD AS IT EVOLVES TO THE EAST TONIGHT.
IN ADDITION TO STRONG WINDS AND HAIL...THESE THUNDERSTORMS
WILL PRODUCE FREQUENT DANGEROUS LIGHTNING.

WILL CONTINUE WITH TRENDS FROM FORECASTS FOR CHANCES
OF SHOWERS AND THUNDERSTORMS EVOLVING FURTHER SOUTH
THURSDAY THROUGH FRIDAY...WITH MORE STABLE CONDITIONS
FORMING OVER THE WEEKEND THROUGH THE EARLY PART OF
NEXT WEEK.

&&

.PREV DISCUSSION... /ISSUED 705 PM CDT WED MAY 14 2008/

AVIATION...ORGANIZED SHRA/TSRA WILL CONTINUE TO TRACK INTO THE
RIO GRANDE PLAINS AND MOVE EASTWARD TOWARD THE I-35 CORRIDOR. THIS
WILL AFFECT THE I-35 TAFS AFTER 04-05Z. A SLIGHT RISK OF SEVERE
STORMS WILL CONTINUE WITH THE PRIMARY THREATS BEING LARGE HAIL
AND DAMAGING WINDS...ISOLATED TORNADOES ARE ALSO A POSSIBILITY. VFR
CONDITIONS WILL GENERALLY PREVAIL EARLY IN THE EVENING WITH SCT-
BKN CU AT 3-5 THSD FEET...WITH CB BECOMING WIDESPREAD TONIGHT WITH
THESE STORMS.

PREV DISCUSSION... /ISSUED 342 PM CDT WED MAY 14 2008/

DISCUSSION...
THE ATMOSPHERE HAS DESTABILIZED WITH HEATING TODAY...WITH LITTLE-
TO-NO CAP REMAINING AND SURFACE-BASED CAPES BETWEEN 3000-4000
J/KG. CONVECTION HAS ALREADY INITIATED ALONG THE DRYLINE AND OVER
THE BURRO MOUNTAINS AND WILL MOVE EAST IN THE STEERING FLOW THIS
EVENING AND OVERNIGHT ACROSS CENTRAL AND SOUTH CENTRAL TEXAS. OUR
AREA IS ONCE AGAIN IN THE SLIGHT RISK AREA OF THE SPC DAY1
CONVECTIVE OUTLOOK...WITH LARGE HAIL BEING THE PRIMARY THREAT
(ALTHOUGH ISOLATED TORNADOES ARE POSSIBLE). RAINFALL AMOUNTS OF
1-3 INCHES ARE POSSIBLE WITH THESE STORMS TONIGHT...SIMILAR TO
LAST NIGHT.

THE UPPER LOW WILL LIFT OUT OF SOUTHERN NEW MEXICO TONIGHT...
ACROSS THE PANHANDLE AND INTO OKLAHOMA BY EARLY THURSDAY MORNING.
A WEAK COLD FRONT WILL SLIDE DOWN INTO OUR AREA THURSDAY AND WILL
INTERACT WITH REMAINING GULF MOISTURE TO PRODUCE ANOTHER ROUND OF
THUNDERSTORMS...MAINLY ACROSS OUR EASTERN HALF. CHANCES FOR PRECIP
WILL BE CARRIED SOUTH WITH THE FRONT THURSDAY NIGHT INTO
FRIDAY. MOISTURE IN THE LOWER ATMOSPHERE WILL POOL ALONG THE RIO
GRANDE VALLEY DURING THIS PERIOD AS A 2ND UPPER LOW DROPS SOUTH
INTO NW MEXICO AND CUTS-OFF. AT SOME TIME BETWEEN SATURDAY AND
MONDAY...THIS FEATURE WILL EJECT OUT OF MEXICO AND MOVE ACROSS OUR
AREA...ALTHOUGH IN A MUCH WEAKENED STATE. THE MEDIUM RANGE MODEL
SOLUTIONS SHOW THE BEST SHOT AT PRECIP OVER THE WEEKEND ACROSS
SOUTH TEXAS...WHERE MOISTURE AVAILABILITY WILL BE GREATEST.
TEMPERATURES OVER THE WEEKEND WILL BE AT OR BELOW SEASONAL
AVERAGES THANKS TO THE POST-FRONTAL AIRMASS AND CLOUD COVER.
HOWEVER...A WARMING TREND WILL BEGIN MONDAY AND WELL CONTINUE
ABOVE NORMAL THROUGH NEXT WEEK.

&&

.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY              64  81  61  81  59 /  70  50  10  -   -
AUSTIN BERGSTROM INTL AIRPORT  64  82  61  80  54 /  70  50  10  -   -
DEL RIO INTL AIRPORT           68  90  64  79  62 /  50  10  40  30  10
SAN ANTONIO INTL AIRPORT       68  86  62  80  58 /  50  40  20  10  -

&&

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

08/03/05/JB/11/01

In the hours before

Local storm report, May 14, 9:25 PM CDT, 1 hour 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
925 PM CDT WED MAY 14 2008

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

0924 PM     HAIL             10 NW LLANO             30.85N  98.79W
05/14/2008  M1.75 INCH       LLANO              TX   CO-OP OBSERVER

&&

EVENT NUMBER 00145

JPB

Local storm report, May 14, 9:34 PM CDT, 1 hour 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
934 PM CDT WED MAY 14 2008

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

0931 PM     HAIL             1 SSE LEANDER           30.55N  97.85W
05/14/2008  M1.25 INCH       WILLIAMSON         TX   COCORAHS

            3 MIN DURATION

&&

EVENT NUMBER 00146

JPB

Local storm report, May 14, 9:35 PM CDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
935 PM CDT WED MAY 14 2008

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

0933 PM     HAIL             1 N ROUND ROCK          30.53N  97.67W
05/14/2008  M1.00 INCH       WILLIAMSON         TX   PUBLIC

&&

EVENT NUMBER 00147

JPB

Local storm report, May 14, 9:58 PM CDT, 1 hour 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
958 PM CDT WED MAY 14 2008

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

0953 PM     TSTM WND GST     PEARSALL                28.89N  99.09W
05/14/2008  M72 MPH          FRIO               TX   STORM CHASER

            OUTFLOW BOUNDARY

&&

EVENT NUMBER 00148

JPB

Local storm report, May 14, 10:12 PM CDT, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1012 PM CDT WED MAY 14 2008

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

1010 PM     HAIL             4 SE HUTTO              30.50N  97.49W
05/14/2008  M0.75 INCH       WILLIAMSON         TX   AMATEUR RADIO

&&

EVENT NUMBER 00150

JPB

Local storm report, May 14, 10:23 PM CDT, 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1023 PM CDT WED MAY 14 2008

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

1016 PM     HAIL             1 NW COUPLAND           30.48N  97.40W
05/14/2008  M1.00 INCH       WILLIAMSON         TX   PUBLIC

&&

EVENT NUMBER 00151

JPB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 7:21 PM CDT	Tornado Warning	EWX	Burnet, Llano	24 min
May 14, 7:28 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Frio, Zavala	62 min
May 14, 7:33 PM CDT	Severe Thunderstorm Warning	EWX	Frio	27 min
May 14, 7:47 PM CDT	Tornado Warning	EWX	Blanco, Burnet, Llano, Travis, Williamson	43 min
May 14, 8:16 PM CDT	Severe Thunderstorm Warning	EWX	Burnet, Williamson	59 min
May 14, 8:29 PM CDT	Tornado Warning	EWX	Burnet, Llano, Travis, Williamson	46 min
May 14, 8:48 PM CDT	Areal Flood Advisory	EWX	Travis, Williamson	117 min
May 14, 9:02 PM CDT	Tornado Warning	EWX	Travis, Williamson	43 min
May 14, 9:07 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Zavala	53 min
May 14, 9:10 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	50 min
May 14, 9:13 PM CDT	Severe Thunderstorm Warning	EWX	Llano	62 min
May 14, 9:27 PM CDT	Areal Flood Advisory	EWX	Burnet, Llano	2 hr
May 14, 9:42 PM CDT	Tornado Warning	EWX	Bastrop, Lee, Travis, Williamson	48 min
May 14, 9:50 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano, Travis, Williamson	40 min
May 14, 10:00 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real	60 min
May 14, 10:31 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	44 min
May 14, 10:52 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Gillespie, Kendall, Kerr	53 min
May 14, 11:58 PM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Blanco, Burnet, Hays, Travis, Williamson	47 min
May 15, 12:24 AM CDT	Severe Thunderstorm Warning	EWX	Maverick	36 min
May 15, 12:36 AM CDT	Areal Flood Advisory	EWX	Travis, Williamson	114 min
May 15, 12:39 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee, Travis, Williamson	36 min
May 15, 1:16 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Fayette, Lee, Travis	34 min

Nearby

Severe Thunderstorm Warnings in Texas, 2008 Every severe thunderstorm warning in 2008

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.