Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 7, NWS Amarillo, TX

October 11, 2011Donley County, Gray County, Wheeler County, Texas

NWS Amarillo, TX issued this tornado warning at Oct 11, 2011, 7:09 PM CDT for Donley County, Gray County, Wheeler County, Texas. It was in force for 36 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: Oct 11, 2011, 7:09 PM CDT (00:09 UTC)
Expired: Oct 11, 2011, 7:45 PM CDT
In force: 36 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon

Counties Donley County, TX, Gray County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 103 km from the middle of the area, began a volume at 00:10 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
Oct 11, 7:30 PM CDT	HAIL 1.75	3 N Mclean, TX

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

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.2 hours before the alert went out and 102 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3705 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 81 m²/s²
0-3 km storm-relative helicity: 119 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.

263 
WFUS54 KAMA 120009
TORAMA
TXC129-179-483-120045-
/O.NEW.KAMA.TO.W.0007.111012T0009Z-111012T0045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
709 PM CDT TUE OCT 11 2011

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN DONLEY COUNTY IN THE PANHANDLE OF TEXAS.
  SOUTHEASTERN GRAY COUNTY IN THE PANHANDLE OF TEXAS.
  SOUTHWESTERN WHEELER COUNTY IN THE PANHANDLE OF TEXAS.

* UNTIL 745 PM CDT

* AT 700 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD 9
  MILES NORTH OF ALANREED...OR ABOUT 19 MILES SOUTHEAST OF PAMPA...
  MOVING SOUTHEAST AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE MCLEAN...
  KELLERVILLE AND ALANREED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO MAY FORM AT ANY TIME...TAKE COVER NOW. ABANDON MOBILE HOMES
AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS.

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

&&

LAT...LON 3533 10034 3509 10069 3535 10088 3549 10066
TIME...MOT...LOC 0009Z 324DEG 18KT 3532 10073

$$

JOHNSON

1 follow-up statement

936 
WWUS54 KAMA 120026
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
726 PM CDT TUE OCT 11 2011

TXC129-179-483-120045-
/O.CON.KAMA.TO.W.0007.000000T0000Z-111012T0045Z/
DONLEY TX-GRAY TX-WHEELER TX-
726 PM CDT TUE OCT 11 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
SOUTHWESTERN WHEELER...SOUTHEASTERN GRAY AND NORTHEASTERN DONLEY
COUNTIES...

AT 724 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A TORNADO.  THIS TORNADO WAS LOCATED NEAR MCLEAN...OR ABOUT 24
MILES WEST OF SHAMROCK...MOVING SOUTHEAST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
ALANREED.

ADDITIONALLY...HAIL UP TO THE SIZE OF QUARTERS IS POSSIBLE.

A TORNADO MAY FORM AT ANY TIME...TAKE COVER NOW. ABANDON MOBILE HOMES
AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS.

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

LAT...LON 3528 10083 3547 10062 3533 10034 3509 10069
TIME...MOT...LOC 0026Z 324DEG 18KT 3527 10066

$$

JOHNSON

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 11, 7:38 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley	38 min
Oct 11, 7:43 PM CDT	Severe Thunderstorm Warning	AMA	Collingsworth, Donley, Gray, Wheeler	62 min
Oct 11, 8:08 PM CDT	Severe Thunderstorm Warning	AMA	Hemphill, Lipscomb	23 min
Oct 12, 4:59 AM CDT	Dense Fog Advisory	AMA	Armstrong, Carson, Donley, Gray, Hansford, Hemphill and 6 more	3 hr

Nearby

Tornado Warnings in Texas, 2011 Every tornado warning in 2011 Tornadoes in 2011

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.