Alert archive / Texas / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 65, NWS Austin/San Antonio, TX

April 10, 2004Hays County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Apr 10, 2004, 5:19 PM CDT for Hays County, Texas. It was in force for 41 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 10, 2004, 5:19 PM CDT (22:19 UTC)
Expired: Apr 10, 2004, 6:00 PM CDT
In force: 41 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Hays County, TX

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
Apr 10, 2:50 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.3 hours before the alert went out and 263 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: 1910 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 607 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

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

418 
WUUS54 KEWX 102219
SVRSAT
TXC209-102300-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
519 PM CDT SAT APR 10 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  HAYS

* UNTIL 600 PM CDT

* AT 519 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WIMBERLEY...MOVING NORTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR DRIFTWOOD AT 535 PM
  NEAR BUDA AT 600 PM

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 2986 9799 3003 9818 3024 9802 3015 9791
          3009 9782 3002 9774

$$

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 10, 2:50 PM CDT, 2 hours 29 minutes earlier.

Area forecast discussion, Apr 10, 2:50 PM CDT, 2 hours 29 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
250 PM CDT SAT APR 10 2004

.DISCUSSION...
ACTIVE WEATHER ON TAP THIS EVENING THRU EARLY SUNDAY MORNING. SHOWERS
AND THUNDERSTORMS ONGOING IN THE VICINITY OF THE COLD FRONT. FRONT
WILL SLIDE SOUTHWARD THIS EVENING WITH INDIVIDUAL STORMS TRAINING
SW TO NE ALONG AND BEHIND THE FRONTAL BOUNDARY. SEVERE WX STILL A
THREAT THRU THE EVENING HOURS WITH LARGE HAIL POSSIBLE WITH ISOLATED
OCCURRENCES OF DAMAGING WINDS. TRAINING CELLS WILL ALSO RESULT IN
FLASH FLOODING...AS SOILS ARE ALREADY SATURATED FROM PREVIOUS RAINS
AND RUNOFF WILL BE RAPID.

ALTHOUGH THE COLD FRONT WILL MOVE SOUTH ACROSS THE CWFA THIS
EVENING...ELEVATED CONVECTION WILL CONTINUE BEHIND THE FRONT.
POST-FRONTAL RAINS WILL CONTINUE ON SUNDAY WITH THE UPPER TROF
STILL TO THE WEST OF THE CWFA. RAIN CHANCES WILL FINALLY END FROM
WEST TO EAST MONDAY AFTERNOON.

DRY WEATHER TUESDAY THRU FRIDAY WITH RIDGING DEVELOPING ALOFT. RAIN
CHANCES RETURN BY THE WEEKEND WITH THE APPROACH OF ANOTHER WESTERN
U.S. UPPER TROF.

&&

.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY              50  58  44  59 /  70  60  30  20
AUSTIN BERGSTROM INTL AIRPORT  50  58  44  59 /  70  60  30  20
DEL RIO INTL AIRPORT           53  59  44  61 /  50  60  30  20
SAN ANTONIO INTL AIRPORT       51  59  44  59 /  70  60  30  20

&&

.EWX WATCHES/WARNINGS/ADVISORIES...FLOOD WATCH FOR FLASH FLOODING
THRU 4 AM CDT SUNDAY FOR ALL OF SOUTH CENTRAL TEXAS AND THE HILL
COUNTRY. SEVERE TSTM WATCH #63 IN EFFECT UNTIL 8 PM CDT FOR MUCH OF
THE HILL COUNTRY AND ALL OF SOUTH CENTRAL TEXAS.

&&

13/03

Hazardous weather outlook, Apr 10, 9:57 AM CDT, 7 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
957 AM CDT SAT APR 10 2004

TXZ171>173-183>194-202>209-217>225-228-111100-
ATASCOSA-BANDERA-BASTROP-BEXAR-BLANCO-BURNET-CALDWELL-COMAL-DEWITT-
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-
957 AM CDT SAT APR 10 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT.
THERE IS A SLIGHT RISK OF SEVERE WEATHER IN THE FORM OF LARGE
HAIL AND DAMAGING WINDS THIS AFTERNOON AND TONIGHT. A SQUALL LINE
IS EXPECTED TO DEVELOP IN ASSOCIATION WITH A COLD FRONTAL PASSAGE.
IN ADDITION...LOCALLY HEAVY RAINFALL IS POSSIBLE.  A FLASH FLOOD
WATCH WILL LIKELY BE POSTED...POSSIBLY AS EARLY AS THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.
LOCALLY HEAVY RAINS ARE EXPECTED TO CONTINUE SUNDAY WHICH WILL
ONLY AGGRAVATE FLASH FLOOD AND FLOOD PROBLEMS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED STARTING LATE THIS MORNING OR THIS
AFTERNOON.

In the hours before

Local storm report, Apr 10, 1:59 PM CDT, 3 hours 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
159 PM CDT SAT APR 10 2004

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

0156 PM     HAIL             1 S ROCKSPRINGS         30.00N 100.21W
04/10/2004  0.75 INCH        EDWARDS            TX   CO-OP OBSERVER

&&

DC

Local storm report, Apr 10, 2:42 PM CDT, 2 hours 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
242 PM CDT SAT APR 10 2004

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

0225 PM     HAIL             17 N LEAKEY             29.97N 99.76W
04/10/2004  0.75 INCH        REAL               TX   CO-OP OBSERVER

            PRADE RANCH

&&

DC

Local storm report, Apr 10, 4:10 PM CDT, 1 hour 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
410 PM CDT SAT APR 10 2004

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

0404 PM     HAIL             N UVALDE                29.22N 99.78W
04/10/2004  1.75 INCH        UVALDE             TX   LAW ENFORCEMENT

&&

DC

Local storm report, Apr 10, 4:20 PM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
420 PM CDT SAT APR 10 2004

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

0416 PM     HAIL             S AUSTIN                30.31N 97.75W
04/10/2004  0.75 INCH        TRAVIS             TX   TRAINED SPOTTER

&&

DC

Local storm report, Apr 10, 5:01 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
501 PM CDT SAT APR 10 2004

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

0448 PM     TSTM WND GST     W CANYON LAKE DAM       29.88N 98.26W
04/10/2004  50 MPH           COMAL              TX   AMATEUR RADIO

            WIND BLEW ANTENNAE DOWN

0450 PM     TSTM WND DMG     SE CANYON LAKE DAM      29.88N 98.26W
04/10/2004                   COMAL              TX   AMATEUR RADIO

            TREE BLOWN DOWN IN SATTLER

&&

DC

Local storm report, Apr 10, 5:09 PM CDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
509 PM CDT SAT APR 10 2004

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

0500 PM     HAIL             NEW BERLIN              29.46N 98.10W
04/10/2004  0.75 INCH        GUADALUPE          TX   AMATEUR RADIO

&&

DC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 11:21 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	39 min
Apr 10, 11:58 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	47 min
Apr 10, 12:25 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	35 min
Apr 10, 12:44 PM CDT	Flash Flood Warning	EWX	Val Verde	3 hr
Apr 10, 1:32 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	58 min
Apr 10, 2:27 PM CDT	Flash Flood Warning	EWX	Real	3 hr
Apr 10, 2:57 PM CDT	Severe Thunderstorm Warning	EWX	Maverick	63 min
Apr 10, 3:10 PM CDT	Severe Thunderstorm Warning	EWX	Kinney	50 min
Apr 10, 3:19 PM CDT	Severe Thunderstorm Warning	EWX	Bandera	56 min
Apr 10, 3:51 PM CDT	Severe Thunderstorm Warning	EWX	Kendall	54 min
Apr 10, 4:04 PM CDT	Severe Thunderstorm Warning	EWX	Uvalde	56 min
Apr 10, 4:09 PM CDT	Severe Thunderstorm Warning	EWX	Medina	66 min
Apr 10, 4:13 PM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	47 min
Apr 10, 4:20 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell	55 min
Apr 10, 4:25 PM CDT	Severe Thunderstorm Warning	EWX	Bexar	65 min
Apr 10, 4:27 PM CDT	Flash Flood Warning	EWX	Medina, Uvalde	3 hr
Apr 10, 4:33 PM CDT	Severe Thunderstorm Warning	EWX	Comal	57 min
Apr 10, 4:41 PM CDT	Flash Flood Warning	EWX	Bexar, Caldwell, Comal, Gonzales, Guadalupe	2 hr
Apr 10, 4:55 PM CDT	Severe Thunderstorm Warning	EWX	Zavala	65 min
Apr 10, 4:57 PM CDT	Flash Flood Warning	EWX	Frio, Zavala	2 hr
Apr 10, 5:05 PM CDT	Flash Flood Warning	EWX	Wilson	115 min
Apr 10, 5:06 PM CDT	Severe Thunderstorm Warning	EWX	Guadalupe	54 min
Apr 10, 5:15 PM CDT	Flash Flood Warning	EWX	Fayette	2 hr
Apr 10, 5:23 PM CDT	Severe Thunderstorm Warning	EWX	Fayette, Lavaca	52 min
Apr 10, 5:28 PM CDT	Tornado Warning	EWX	Fayette, Lavaca	47 min
Apr 10, 5:29 PM CDT	Flash Flood Warning	EWX	Atascosa	91 min
Apr 10, 5:32 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Bexar	58 min
Apr 10, 5:35 PM CDT	Flash Flood Warning	EWX	Lavaca	100 min
Apr 10, 5:55 PM CDT	Flash Flood Warning	EWX	DeWitt, Karnes	2 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2004 Every severe thunderstorm warning in 2004

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.