Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 2, NWS Amarillo, TX

June 11, 2011Beaver County, Texas County, Oklahoma

NWS Amarillo, TX issued this tornado warning at Jun 11, 2011, 7:24 PM CDT for Beaver County, Texas County, Oklahoma. It was in force for 51 min. 4 reports 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: Jun 11, 2011, 7:24 PM CDT (00:24 UTC)
Expired: Jun 11, 2011, 8:15 PM CDT
In force: 51 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon

Counties Beaver County, OK, Texas County, OK

The radar

The Dodge City radar (KDDC), 128 km from the middle of the area, began a volume at 00:25 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
Jun 11, 7:50 PM CDT	TORNADO	5 N Boyd, OK	BRIEF TORNADO AND BECAME RAIN WRAPPED.
Jun 11, 8:04 PM CDT	HAIL 4.5	5 W Beaver, OK	GOLFBALL TO SOFTBALL SIZE HAIL.
Jun 11, 8:15 PM CDT	HAIL 1.75	4 W Beaver, OK
Jun 11, 8:18 PM CDT	HAIL 1	Tyrone, OK

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
Jun 11, 3:39 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Dodge City, (KDDC), launched 00:00Z, 0.4 hours before the alert went out and 133 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: 889 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1800 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 187 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.

221 
WFUS54 KAMA 120024
TORAMA
OKC007-139-120115-
/O.NEW.KAMA.TO.W.0002.110612T0024Z-110612T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE AMARILLO TX
724 PM CDT SAT JUN 11 2011

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN TEXAS COUNTY IN THE PANHANDLE OF OKLAHOMA.
  NORTHWESTERN BEAVER COUNTY IN THE PANHANDLE OF OKLAHOMA.

* UNTIL 815 PM CDT

* AT 720 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE
  MOST DANGEROUS PART OF THIS STORM WAS LOCATED NEAR BAKER...OR ABOUT
  12 MILES SOUTH OF LIBERAL...MOVING EAST SOUTHEAST AT 15 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE TYRONE...
  TURPIN...FLORIS AND BAKER.

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 3697 10113 3700 10094 3700 10054 3673 10060
      3676 10100 3689 10117
TIME...MOT...LOC 0023Z 283DEG 18KT 3688 10100

$$

TB

1 follow-up statement

948 
WWUS54 KAMA 120050
SVSAMA

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE AMARILLO TX
750 PM CDT SAT JUN 11 2011

OKC007-139-120115-
/O.CON.KAMA.TO.W.0002.000000T0000Z-110612T0115Z/
TEXAS OK-BEAVER OK-
750 PM CDT SAT JUN 11 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR
NORTHWESTERN BEAVER AND EXTREME NORTHEASTERN TEXAS COUNTIES...

AT 748 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT A TORNADO.  THIS POSSIBLE TORNADO WAS LOCATED NEAR 
TURPIN...OR ABOUT 13 MILES SOUTH OF LIBERAL...MOVING EAST AT 20 MPH.

THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
INDICATED COUNTY.

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 3676 10100 3699 10098 3700 10094 3700 10054
      3673 10060
TIME...MOT...LOC 0050Z 282DEG 18KT 3686 10085

$$

TB

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 7:04 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	56 min
Jun 11, 7:29 PM CDT	Tornado Warning	AMA	Beaver	31 min
Jun 11, 8:00 PM CDT	Tornado Warning	AMA	Beaver	30 min
Jun 11, 8:02 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	58 min
Jun 11, 8:07 PM CDT	Tornado Warning	AMA	Beaver	23 min
Jun 11, 8:18 PM CDT	Severe Thunderstorm Warning	AMA	Beaver, Texas	26 min
Jun 11, 8:29 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	61 min
Jun 11, 8:53 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	56 min
Jun 11, 9:19 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	39 min
Jun 11, 9:55 PM CDT	Severe Thunderstorm Warning	AMA	Beaver	5 min
Jun 12, 3:26 AM CDT	Red Flag Warning	AMA	Cimarron, Texas	18 hr
Jun 12, 3:00 PM CDT	Fire Weather Watch	AMA	Beaver, Cimarron, Texas	14 hr

Nearby

Tornado Warnings in Oklahoma, 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.