Alert archive / Texas / Tornado Warnings in 2004

Tornado Warning 47, NWS Austin/San Antonio, TX

November 23, 2004Atascosa County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Nov 23, 2004, 6:55 PM CST for Atascosa County, Texas. It was in force for 65 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: Nov 23, 2004, 6:55 PM CST (00:55 UTC)
Expired: Nov 23, 2004, 8:00 PM CST
In force: 65 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Atascosa County, TX

The radar

The Austin/San Antonio radar (KEWX), 104 km from the middle of the area, began a volume at 00:59 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Nov 23, 3:15 PM CST	Severe Thunderstorm Watch	SPC	5 hr
Nov 23, 5:30 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 0.9 hours before the alert went out and 175 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: 3323 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 782 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 1.9
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KEWX 240055
TOREWX
TXC013-240200-
/X.NEW.KEWX.TO.W.0031.041124T0055Z-041124T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
655 PM CST TUE NOV 23 2004

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR THE FOLLOWING COUNTIES...
  ATASCOSA

* UNTIL 800 PM CST

* AT 657 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES EAST OF
  CHRISTINE...MOVING EAST AT 45 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE PLEASANTON...LEMING AND
  CAMPBELLTON.

THE SAFEST PLACE TO BE DURING A TORNADO IS ON THE LOWEST FLOOR OF A
BUILDING IN AN INTERIOR HALLWAY...BATHROOM...OR CLOSET. COVER
YOURSELF WITH BLANKETS...PILLOWS OR EVEN A MATTRESS FOR BETTER
PROTECTION.

LAT...LON 2907 9882 2865 9881 2866 9832 2879 9812
      2911 9841

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 23, 6:05 PM CST	Tornado Warning	EWX	Atascosa	55 min
Nov 23, 6:07 PM CST	Tornado Warning	EWX	Williamson	53 min
Nov 23, 6:10 PM CST	Tornado Warning	EWX	Frio	65 min
Nov 23, 6:12 PM CST	Flash Flood Warning	EWX	Burnet, Williamson	3 hr
Nov 23, 6:40 PM CST	Tornado Warning	EWX	Wilson	65 min
Nov 23, 7:08 PM CST	Tornado Warning	EWX	Karnes	67 min
Nov 23, 7:13 PM CST	Flash Flood Warning	EWX	Karnes	3 hr
Nov 23, 7:33 PM CST	Tornado Warning	EWX	DeWitt	57 min
Nov 23, 7:45 PM CST	Flash Flood Warning	EWX	DeWitt	3 hr
Nov 23, 8:01 PM CST	Severe Thunderstorm Warning	EWX	Fayette, Lee	59 min
Nov 23, 8:28 PM CST	Severe Thunderstorm Warning	EWX	Lavaca	47 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; radar from the NEXRAD Level II archive.