Alert archive / Texas / Tornado Warnings in 2007

Tornado Warning 22, NWS Amarillo, TX

April 21, 2007Hartley County, Texas

NWS Amarillo, TX issued this tornado warning at Apr 21, 2007, 6:54 PM CDT for Hartley County, Texas. It was in force for 51 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: Apr 21, 2007, 6:54 PM CDT (23:54 UTC)
Expired: Apr 21, 2007, 7:45 PM CDT
In force: 51 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

County Hartley County, TX

The radar

The Amarillo radar (KAMA), 82 km from the middle of the area, began a volume at 23:54 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
Apr 21, 7:00 PM CDT	TORNADO	5 Ne Channing, TX

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

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 21, 3:44 PM CDT	Tornado Watch PDS	SPC	8 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 11.9 hours before the alert went out and 83 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: 516 J/kg
Mixed-layer CIN: -318 J/kg
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

000 
WFUS54 KAMA 212354
TORAMA
TXC205-220045-
/O.NEW.KAMA.TO.W.0022.070421T2354Z-070422T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
654 PM CDT SAT APR 21 2007

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN HARTLEY COUNTY IN THE PANHANDLE OF TEXAS

* UNTIL 745 PM CDT

* AT 650 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A TORNADO 7 MILES
  SOUTH OF CHANNING...OR ABOUT 23 MILES NORTH OF VEGA...MOVING
  NORTHEAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CHANNING...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING HAIL 
TO THE SIZE OF QUARTERS 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.

TO REPORT SEVERE WEATHER...PLEASE CALL THE NATIONAL WEATHER SERVICE
AT 8 0 6 3 3 5 1 1 2 1.

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT SUNDAY MORNING
FOR CENTRAL OKLAHOMA.

LAT...LON 3578 10217 3576 10216 3563 10216 3563 10243
      3567 10243 3576 10238 3580 10238 3593 10232
      3605 10229 3605 10218

$$

JOHNSON

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 20, 8:40 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	65 min
Apr 20, 10:02 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Carson	58 min
Apr 21, 5:47 PM CDT	Severe Thunderstorm Warning	AMA	Deaf Smith, Oldham	58 min
Apr 21, 6:03 PM CDT	Tornado Warning	AMA	Deaf Smith	42 min
Apr 21, 6:12 PM CDT	Severe Thunderstorm Warning	AMA	Dallam, Hartley	63 min
Apr 21, 6:19 PM CDT	Tornado Warning	AMA	Oldham	26 min
Apr 21, 6:45 PM CDT	Tornado Warning	AMA	Deaf Smith, Oldham, Potter, Randall	45 min
Apr 21, 6:57 PM CDT	Tornado Warning	AMA	Dallam	48 min

Nearby

Tornado Warnings in Texas, 2007 Every tornado warning in 2007 Tornadoes in 2007

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.