Alert archive / Texas / Tornado Warnings in 2004

Tornado Warning 7, NWS Austin/San Antonio, TX

April 23, 2004Maverick County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Apr 23, 2004, 9:38 PM CDT for Maverick County, Texas. It was in force for 37 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 23, 2004, 9:38 PM CDT (02:38 UTC)
Expired: Apr 23, 2004, 10:15 PM CDT
In force: 37 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Maverick County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 2.6 hours before the alert went out and 81 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: 2594 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 842 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -34 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.

401 
WFUS54 KEWX 240238
TORSAT
TXC323-240315-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
938 PM CDT FRI APR 23 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR...
  MAVERICK COUNTY IN SOUTH CENTRAL TEXAS
  THIS INCLUDES THE CITY OF EL INDIO

* UNTIL 1015 PM CDT

* AT 932 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 10 MILES WEST OF
  EL INDIO...MOVING EAST AT 30 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  EL INDIO BY 950 PM CDT

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 2907 10064 2890 10060 2862 10043 2828 10024
          2825 10014 2908 10014

$$

MSL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 12:50 AM CDT	Severe Thunderstorm Warning	EWX	Medina	25 min
Apr 24, 12:54 AM CDT	Severe Thunderstorm Warning	EWX	Bexar	51 min
Apr 24, 1:10 AM CDT	Flash Flood Warning	EWX	Atascosa, Bexar	3 hr
Apr 24, 1:15 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa	45 min
Apr 24, 1:30 AM CDT	Severe Thunderstorm Warning	EWX	Kendall	45 min
Apr 24, 1:42 AM CDT	Severe Thunderstorm Warning	EWX	Wilson	48 min
Apr 24, 2:08 AM CDT	Flash Flood Warning	EWX	Blanco, Gillespie	3 hr
Apr 24, 2:10 AM CDT	Severe Thunderstorm Warning	EWX	Comal, Guadalupe	50 min
Apr 24, 2:15 AM CDT	Flash Flood Warning	EWX	Comal	3 hr
Apr 24, 2:46 AM CDT	Flash Flood Warning	EWX	Gonzales, Guadalupe	3 hr
Apr 24, 3:42 AM CDT	Severe Thunderstorm Warning	EWX	Lavaca	63 min

Nearby

Tornado Warnings in Texas, 2004 Every tornado warning in 2004 Tornadoes 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.