Alert archive / Oklahoma / Tornado Warnings in 2011

Tornado Warning 5, NWS Amarillo, TX

June 11, 2011Beaver County, Oklahoma

NWS Amarillo, TX issued this tornado warning at Jun 11, 2011, 8:07 PM CDT for Beaver County, Oklahoma. It was in force for 23 min. 5 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, 8:07 PM CDT (01:07 UTC)
Expired: Jun 11, 2011, 8:30 PM CDT
In force: 23 min
Issued by: NWS Amarillo, TX
Area: Storm-based polygon

County Beaver County, OK

The radar

The Dodge City radar (KDDC), 109 km from the middle of the area, began a volume at 01:07 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, 8:15 PM CDT	HAIL 1.75	4 W Beaver, OK
Jun 11, 8:25 PM CDT	TSTM WND GST 70	1 Ssw Beaver, OK
Jun 11, 8:29 PM CDT	HAIL 1.75	Beaver, OK
Jun 11, 8:40 PM CDT	TSTM WND DMG	2 Se Forgan, OK	OVERTURNED IRRIGATION EQUIPMENT. REPORT RELAYED BY BROADCAST MEDIA.
Jun 11, 8:40 PM CDT	HAIL 1	Beaver, 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, 1.1 hours before the alert went out and 112 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.

913 
WFUS54 KAMA 120107
TORAMA
OKC007-120130-
/O.NEW.KAMA.TO.W.0005.110612T0107Z-110612T0130Z/

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

THE NATIONAL WEATHER SERVICE IN AMARILLO HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN BEAVER COUNTY IN THE PANHANDLE OF OKLAHOMA.

* UNTIL 830 PM CDT

* AT 801 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE       
  DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.     
  THIS TORNADO MAY BE WRAPPED IN RAIN. THE MOST DANGEROUS PART OF    
  THIS STORM WAS LOCATED NEAR FLORIS...OR ABOUT 10 MILES WEST OF     
  BEAVER...MOVING EAST AT 20 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE TURPIN...
  MOCANE...KNOWLES...GATE...FORGAN...FLORIS...BOYD AND BEAVER.

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 3693 10000 3661 10001 3670 10094 3699 10092
TIME...MOT...LOC 0106Z 278DEG 22KT 3679 10066

$$

TB

1 follow-up statement

352 
WWUS54 KAMA 120120
SVSAMA

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

OKC007-120130-
/O.CON.KAMA.TO.W.0005.000000T0000Z-110612T0130Z/
BEAVER OK-
820 PM CDT SAT JUN 11 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR NORTHERN
BEAVER COUNTY...

AT 815 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A TORNADO.  THIS TORNADO WAS LOCATED NEAR BEAVER...MOVING EAST
AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MOCANE...KNOWLES AND GATE.

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

IN ADDITION TO THE THREAT OF A TORNADO...THIS STORM IS CAPABLE OF 
PRODUCING SOFTBALL SIZE HAIL.

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

LAT...LON 3674 10082 3698 10081 3693 10000 3661 10001
TIME...MOT...LOC 0119Z 278DEG 22KT 3678 10056

$$

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, 7:24 PM CDT	Tornado Warning	AMA	Beaver, Texas	51 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, 8:18 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.