Alert archive / Texas / Tornado Warnings in 2007

Tornado Warning 21, NWS Amarillo, TX

April 21, 20074 counties in Texas

NWS Amarillo, TX issued this tornado warning at Apr 21, 2007, 6:45 PM CDT for 4 counties in Texas. It was in force for 45 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, 6:45 PM CDT (23:45 UTC)
Expired: Apr 21, 2007, 7:30 PM CDT
In force: 45 min
Issued by: NWS Amarillo, TX
Area: Counties, with a storm outline in the text

Counties Deaf Smith County, TX, Oldham County, TX, Potter County, TX, Randall County, TX

The radar

The Amarillo radar (KAMA), 36 km from the middle of the area, began a volume at 23:46 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, 6:45 PM CDT	HAIL 1	3 S Wildorado, TX	REPORTED BY LOCAL MEDIA

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, 11.8 hours before the alert went out and 37 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 212346
TORAMA
TXC117-359-375-381-220030-
/O.NEW.KAMA.TO.W.0021.070421T2345Z-070422T0030Z/

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

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN DEAF SMITH COUNTY IN THE PANHANDLE OF TEXAS
  SOUTHEASTERN OLDHAM COUNTY IN THE PANHANDLE OF TEXAS
  POTTER COUNTY IN THE PANHANDLE OF TEXAS
  NORTHWESTERN RANDALL COUNTY IN THE PANHANDLE OF TEXAS

* UNTIL 730 PM CDT

* AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 8 MILES SOUTH OF
  WILDORADO...OR ABOUT 14 MILES SOUTHEAST OF VEGA...MOVING NORTHEAST
  AT 40 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WILDORADO...
  BUSHLAND...
  VALLEY DE ORO...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. IF YOU
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

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.

LAT...LON 3510 10240 3500 10220 3551 10163 3556 10183
      3562 10213

$$


JORDAN

2 follow-up statements

000 
WWUS54 KAMA 212359
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
656 PM CDT SAT APR 21 2007

TXC117-359-375-381-220030-
/O.CON.KAMA.TO.W.0021.000000T0000Z-070422T0030Z/
OLDHAM TX-POTTER TX-RANDALL TX-DEAF SMITH TX-
656 PM CDT SAT APR 21 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHEASTERN DEAF SMITH...NORTHWESTERN RANDALL...POTTER AND EASTERN
OLDHAM COUNTIES...

AT 654 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
DETECT A CIRCULATION NEAR WILDORADO...OR ABOUT 16 MILES EAST OF 
VEGA...MOVING NORTHEAST AT 40 MPH.

A SECOND TORNADIC STORM WAS LOCATED 6 MILES SOUTH SOUTHEAST OF  
CHANNING AND WAS MOVING NORTHEAST AT 45 MPH.  LAW ENFORCEMENT 
SPOTTERS REPORTED A TORNADO LOCATED NEAR CHANNING HEADING TOWARDS 
THE TOWN OF CHANNING AND WILL MOVE INTO HARTLEY COUNTY IN THE NEXT 
10 MINUTES.

* LOCATIONS IMPACTED INCLUDE...
  BUSHLAND...
  WILDORADO...
  VALLEY DE ORO...
  BOYS RANCH...

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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.

LAT...LON 3510 10240 3507 10216 3551 10163 3556 10183
      3562 10213 3562 10240

$$

000 
WWUS54 KAMA 220006
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
705 PM CDT SAT APR 21 2007

TXC117-381-220015-
/O.CAN.KAMA.TO.W.0021.000000T0000Z-070422T0030Z/
RANDALL TX-DEAF SMITH TX-
705 PM CDT SAT APR 21 2007

...THE TORNADO WARNING FOR DEAF SMITH AND RANDALL COUNTIES IS
CANCELLED...

THE STORM THAT PROMPTED THE TORNADO WARNING HAS MOVED OUT OF DEAF 
SMITH AND RANDALL COUNTIES...THUS THE WARNING HAS BEEN CANCELED

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

LAT...LON 3517 10230 3515 10216 3551 10163 3556 10183
      3562 10213 3561 10228

$$

TXC359-375-220030-
/O.CON.KAMA.TO.W.0021.000000T0000Z-070422T0030Z/
OLDHAM TX-POTTER TX-
705 PM CDT SAT APR 21 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
NORTHWESTERN POTTER AND EASTERN OLDHAM COUNTIES...

AT 703 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR AND STORM
SPOTTERS WERE TRACKING A TORNADO. THIS TORNADO WAS LOCATED 6 MILES 
EAST OF WILDORADO...MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WILDORADO...
  BUSHLAND...
  VALLEY DE ORO...

DO NOT USE HIGHWAY OVERPASSES FOR SHELTER. OVERPASSES DO NOT PROVIDE
PROTECTION FROM TORNADIC WINDS. VEHICLES STOPPED UNDER BRIDGES BLOCK
TRAFFIC AND PREVENT PEOPLE FROM GETTING OUT OF THE STORMS PATH AND TO
SHELTER. IF YOU CANNOT DRIVE AWAY FROM THE TORNADO...GET OUT OF YOUR
VEHICLE AND LIE FLAT IN A DITCH AS A LAST RESORT.

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

LAT...LON 3517 10230 3515 10216 3551 10163 3556 10183
      3562 10213 3561 10228

$$


JORDAN

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, 6:54 PM CDT	Tornado Warning	AMA	Hartley	51 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.