Alert archive / Texas / Tornado Warnings in 2006

Tornado Warning 21, NWS Austin/San Antonio, TX

April 28, 2006Val Verde County, Texas

NWS Austin/San Antonio, TX issued this tornado warning at Apr 28, 2006, 3:37 PM CDT for Val Verde County, Texas. It was in force for 23 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 28, 2006, 3:37 PM CDT (20:37 UTC)
Expired: Apr 28, 2006, 4:00 PM CDT
In force: 23 min
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 141 km from the middle of the area, began a volume at 20:38 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
Apr 28, 1:28 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 8.6 hours before the alert went out and 93 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: 1176 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 626 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 285 m²/s²
0-3 km storm-relative helicity: 306 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.4

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KEWX 282038
TOREWX
TXC465-282100-
/O.NEW.KEWX.TO.W.0021.060428T2037Z-060428T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
337 PM CDT FRI APR 28 2006

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* TORNADO WARNING FOR THE FOLLOWING COUNTIES...
  VAL VERDE

* UNTIL 400 PM CDT

* AT 334 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER VAL VERDE
  COUNTY...BETWEEN LANGTRY AND PANDALE...MOVING NORTHEAST AT 25 MPH.

* THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF VAL
  VERDE COUNTY AND MOVE TOWARD JUNO.

A VEHICLE IS EASILY ROLLED AND CRUSHED BY A TORNADO. DO NOT TRY TO
OUTRUN ONE. IF NO STRONG BUILDING IS CLOSE...LEAVE YOUR VEHICLE AND
TAKE SHELTER IN A DITCH OR LOW SPOT. COVER YOUR HEAD.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT FRIDAY EVENING FOR
SOUTH CENTRAL TEXAS.

LAT...LON 2999 10167 2983 10158 2998 10117 3018 10128

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 2:41 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	49 min
Apr 28, 3:28 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	62 min
Apr 28, 3:58 PM CDT	Tornado Warning	EWX	Val Verde	62 min
Apr 28, 4:33 PM CDT	Tornado Warning	EWX	Edwards	42 min
Apr 28, 5:00 PM CDT	Tornado Warning	EWX	Val Verde	15 min
Apr 28, 5:11 PM CDT	Tornado Warning	EWX	Edwards	34 min
Apr 28, 5:45 PM CDT	Severe Thunderstorm Warning	EWX	Edwards	28 min
Apr 28, 6:10 PM CDT	Tornado Warning	EWX	Edwards	35 min
Apr 28, 6:38 PM CDT	Severe Thunderstorm Warning	EWX	Kerr	37 min

Nearby

Tornado Warnings in Texas, 2006 Every tornado warning in 2006 Tornadoes in 2006

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.