Alert archive / Texas / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 113, NWS Austin/San Antonio, TX

May 14, 2008Burnet County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 14, 2008, 4:12 AM CDT for Burnet County, Williamson County, Texas. It was in force for 63 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 14, 2008, 4:12 AM CDT (09:12 UTC)
Expired: May 14, 2008, 5:15 AM CDT
In force: 63 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Burnet County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 77 km from the middle of the area, began a volume at 09:13 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.

What was reported inside it

Time	Report	Where	Remark
May 14, 5:00 AM CDT	TSTM WND DMG	2 Se Burnet, TX	MULTIPLE TREES DOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 48 minutes after it went out.

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, 3:39 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 9.2 hours before the alert went out and 237 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: 3961 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 681 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: -70 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 4.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KEWX 140912
SVREWX
TXC053-491-141015-
/O.NEW.KEWX.SV.W.0113.080514T0912Z-080514T1015Z/

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BURNET COUNTY...
  NORTHWESTERN WILLIAMSON COUNTY...

* UNTIL 515 AM CDT.

* AT 411 AM CDT...NWS METEOROLOGISTS HAVE DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 16 MILES WEST OF
  BURNET...OR NEAR BUCHANAN DAM...AND MOVING EAST AT 40 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BURNET BY 435 AM CDT...
  SHADY GROVE AND 6 MILES NORTH OF BERTRAM BY 450 AM CDT...
  JOPPA BY 455 AM CDT...
  MAHOMET BY 500 AM CDT...
  BRIGGS BY 505 AM CDT...
  ANDICE BY 510 AM CDT...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 AM CDT
WEDNESDAY MORNING FOR SOUTH CENTRAL TEXAS.

LAT...LON 3093 9783 3092 9781 3063 9784 3068 9840
      3075 9837 3077 9843 3081 9841 3083 9837
      3088 9845 3092 9844 3103 9790
TIME...MOT...LOC 0912Z 265DEG 35KT 3079 9849

$$

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, 3:52 AM CDT, 20 minutes earlier.

Area forecast discussion, May 14, 3:52 AM CDT, 20 minutes before

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

.DISCUSSION...
CURRENT CONVECTIVE ACTIVITY WILL CONTINUE TRACKING EAST AND EXIT
THE REGION AFTER 10 AM.

THE UPPER LOW MAINTAINS A DUE EAST MOVEMENT INTO SE NEW
MEXICO...APPROX 20 MPH SPEED. BRINGING THE DRY SLOT OVER THE
NORTHWEST COUNTIES AT 18Z, COINCIDENT WITH THE DRY LINE. THE DRY
SLOT/UPPER JET REMAINS OVER THE DRY LINE OVER THE WESTERN HILL
COUNTRY THROUGH 10 PM TONIGHT.

ENOUGH INSTABILITY WITH DAYTIME HEATING AND AMPLE PRECIPITABLE WATER
ALONG WITH DIFLUENT FLOW AS THE NOSE OF THE 300MB JET WILL MAKE FOR
ANOTHER ROUND OF SEVERE THUNDERSTORMS ALONG THE DRY LINE.

THURSDAY AND FRIDAY - - THE TRANSITIONAL WEATHER PATTERN DEVELOPS
ANOTHER UPPER LOW OVER NORTHWEST MEXICO WITH A PROGRESSIVE UPPER
TROUGH MOVE SOUTHEAST THROUGH THE MIDWEST AND SWINGS EAST THROUGH
NEW ENGLAND. THIS PATTERN WILL SEND A COLDER AIRMASS SOUTH THROUGH
THE STATE GRADUALLY PUSHING THE COLD FRONTAL BOUNDARY INTO THE
GULF WHILE OVERRUNNING HIGH CLOUDINESS STREAM ACROSS THE AREA.
LOCALLY HEAVY RAIN WILL BE POSSIBLE THURSDAY...TAPERING OFF THURSDAY
NIGHT AS THE RAINY PATTERN SHIFTS SOUTH.

SATURDAY THROUGH TUESDAY - -THE UPPER LOW RETROGRADES TO BAJA
WITH AN ALMOST EAST-WEST TROF AXIS FROM BAJA TO THE RED
RIVER...AND A STRONG NORTH FLOW THROUGH THE MID SECTIONS OF THE
UNITED STATES. THE UPPER TROF AXIS SHIFTS SOUTH THROUGH TEXAS,
ALLOWING THE DRY NORTHERLY FLOW TO MOVE INTO THE REGION.

&&

.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY              89  70  80  60  80 /  50  30  50  10  -
AUSTIN BERGSTROM INTL AIRPORT  88  69  81  58  79 /  50  30  50  10  10
DEL RIO INTL AIRPORT           95  70  88  65  77 /  20  30  20  30  20
SAN ANTONIO INTL AIRPORT       89  71  81  63  78 /  40  30  50  20  20

&&

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

06/04

Hazardous weather outlook, May 13, 3:58 PM CDT, 12 hours 14 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
358 PM CDT TUE MAY 13 2008

TXZ171>173-183>194-202>209-217>225-228-141200-
LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA-
GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE-
MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA-
FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT-
358 PM CDT TUE MAY 13 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT. ISOLATED
STRONG TO SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP OVER THE
EDWARDS PLATEAU THIS EVENING...THEN SPREAD EAST AND BECOME MORE
NUMEROUS LATE TONIGHT OVER THE HILL COUNTRY AND NEAR THE AUSTIN
METRO AREA. LOCALLY HEAVY RAINS OF 1 TO 3 INCHES MAY RESULT IN AN
ISOLATED FLASH FLOOD THREAT...GENERALLY NORTH OF A CAMP WOOD TO
SAN MARCOS TO GIDDINGS LINE. OTHERWISE... THE PRIMARY THREATS ARE
FOR LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS LATE WEDNESDAY
AFTERNOON THROUGH EARLY THURSDAY MORNING. LARGE HAIL AND DAMAGING
WINDS ARE THE PRIMARY THREATS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE NEEDED TONIGHT OR LATE WEDNESDAY.

In the hours before

Local storm report, May 14, 2:53 AM CDT, 1 hour 19 minutes before

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

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

0240 AM     HAIL             SPOFFORD                29.17N 100.42W
05/14/2008  E0.50 INCH       KINNEY             TX   LAW ENFORCEMENT

            VERY HEAVY RAINS

&&

EVENT NUMBER 00113

JPB

Local storm report, May 14, 3:11 AM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
311 AM CDT WED MAY 14 2008

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

0235 AM     HAIL             LEAKEY                  29.73N  99.76W
05/14/2008  M0.50 INCH       REAL               TX   LAW ENFORCEMENT

            ON THE NORTH SIDE OF THE STORM

0240 AM     HAIL             SPOFFORD                29.17N 100.42W
05/14/2008  E0.50 INCH       KINNEY             TX   LAW ENFORCEMENT

            VERY HEAVY RAINS

0250 AM     HAIL             SPOFFORD                29.17N 100.41W
05/14/2008  M1.00 INCH       KINNEY             TX   LAW ENFORCEMENT

            STRONG WINDS AND VERY HEAVY RAIN

0250 AM     HAIL             6 W BRACKETTVILLE       29.33N 100.51W
05/14/2008  M1.75 INCH       KINNEY             TX   LAW ENFORCEMENT

&&

EVENT NUMBER 00112 00113 00114 00115

JPB

Local storm report, May 14, 3:52 AM CDT, 20 minutes before

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

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

0348 AM     HAIL             1 SW SABINAL            29.32N  99.47W
05/14/2008  M0.75 INCH       UVALDE             TX   TRAINED SPOTTER

&&

EVENT NUMBER 00116

JPB

Local storm report, May 14, 4:01 AM CDT, 11 minutes before

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

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

0358 AM     HAIL             10 NW LLANO             30.84N  98.81W
05/14/2008  M0.88 INCH       LLANO              TX   COCORAHS

&&

EVENT NUMBER 00117

JPB

Local storm report, May 14, 4:03 AM CDT, 9 minutes before

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

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

0358 AM     HAIL             5 WSW DHANIS           29.31N  99.36W
05/14/2008  E0.88 INCH       MEDINA             TX   TRAINED SPOTTER

            GUSTY THUNDERSTORM WINDS

&&

EVENT NUMBER 00118

JPB

Local storm report, May 14, 4:11 AM CDT, 1 minute before

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

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

0407 AM     HEAVY RAIN       1 SSE PIPE CREEK        29.70N  98.93W
05/14/2008  M3.66 INCH       BANDERA            TX   EMERGENCY MNGR

            0NE HOUR RAINFALL

&&

EVENT NUMBER 00119

JPB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 7:20 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	70 min
May 13, 7:44 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	31 min
May 13, 8:17 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Val Verde	28 min
May 13, 8:28 PM CDT	Severe Thunderstorm Warning	EWX	Kinney	24 min
May 13, 8:29 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real	61 min
May 13, 9:37 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Gillespie, Kerr, Real	53 min
May 13, 10:39 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kerr	51 min
May 14, 1:27 AM CDT	Tornado Warning	EWX	Kinney, Maverick	63 min
May 14, 1:58 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kinney, Real, Uvalde	62 min
May 14, 2:23 AM CDT	Areal Flood Advisory	EWX	Edwards, Real, Uvalde	2 hr
May 14, 2:28 AM CDT	Tornado Warning	EWX	Kinney, Maverick, Uvalde, Zavala	47 min
May 14, 2:59 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kinney, Medina, Real, Uvalde	61 min
May 14, 3:02 AM CDT	Areal Flood Advisory	EWX	Bandera, Real	118 min
May 14, 3:08 AM CDT	Severe Thunderstorm Warning	EWX	Edwards	56 min
May 14, 3:24 AM CDT	Severe Thunderstorm Warning	EWX	Llano	66 min
May 14, 3:35 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Kendall, Kerr	25 min
May 14, 3:52 AM CDT	Severe Thunderstorm Warning	EWX	Bandera, Bexar, Blanco, Comal, Kendall, Kerr and 1 more	68 min
May 14, 4:45 AM CDT	Areal Flood Advisory	EWX	Bandera, Edwards, Kerr, Real, Uvalde, Val Verde	2 hr
May 14, 4:51 AM CDT	Severe Thunderstorm Warning	EWX	Bexar, Caldwell, Comal, Gonzales, Guadalupe, Hays	69 min
May 14, 5:04 AM CDT	Severe Thunderstorm Warning	EWX	Burnet, Travis, Williamson	56 min
May 14, 5:19 AM CDT	Areal Flood Advisory	EWX	Burnet	116 min
May 14, 6:30 AM CDT	Areal Flood Advisory	EWX	Bandera, Gillespie, Kerr, Llano	79 min
May 14, 8:01 AM CDT	Severe Thunderstorm Warning	EWX	Comal, Hays, Travis	37 min
May 14, 8:55 AM CDT	Areal Flood Advisory	EWX	Hays, Travis	2 hr
May 14, 9:07 AM CDT	Flash Flood Warning	EWX	Fayette	3 hr
May 14, 4:30 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	75 min
May 14, 5:20 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick, Zavala	55 min
May 14, 5:58 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde, Zavala	62 min
May 14, 6:20 PM CDT	Tornado Warning	EWX	Frio, Medina, Uvalde, Zavala	40 min
May 14, 6:26 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick, Zavala	64 min
May 14, 6:37 PM CDT	Tornado Warning	EWX	Llano	38 min
May 14, 6:48 PM CDT	Tornado Warning	EWX	Atascosa, Frio, Zavala	42 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.