Alert archive / Texas / Tornado Watches in 2005

Tornado Watch 462

June 11, 20059 counties in Oklahoma; 18 counties in Texas

The Storm Prediction Center issued this tornado watch at Jun 11, 2005, 4:55 PM CDT for 9 counties in Oklahoma; 18 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2005, 4:55 PM CDT (21:55 UTC)
Expired: Jun 11, 2005, 11:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 27 counties

Beaver County, OK, Beckham County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Roger Mills County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Roberts County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 103 km from the middle of the area, began a volume at 21:55 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.

Warnings issued inside it

4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 11, 6:25 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong, Randall	65 min
Jun 11, 7:05 PM CDT	Tornado Warning	AMA	Armstrong	55 min
Jun 11, 7:56 PM CDT	Tornado Warning	AMA	Armstrong	64 min
Jun 11, 8:53 PM CDT	Severe Thunderstorm Warning	AMA	Armstrong	67 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.9 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: 960 J/kg
Mixed-layer CIN: -81 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

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

000 
WWUS20 KWNS 112156
SEL2  
SPC WW 112156
OKZ000-TXZ000-120400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 462
NWS STORM PREDICTION CENTER NORMAN OK
455 PM CDT SAT JUN 11 2005

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       WESTERN OKLAHOMA INCLUDING THE EASTERN PANHANDLE
       EASTERN TEXAS PANHANDLE AND NORTHWEST TEXAS

EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 455 PM UNTIL
1100 PM CDT.

TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE MILES
EAST AND WEST OF A LINE FROM 50 MILES NORTH NORTHWEST OF GAGE
OKLAHOMA TO 40 MILES SOUTH SOUTHWEST OF CHILDRESS TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU2).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 459...WW 460...WW 461...

DISCUSSION...AIR MASS REMAINS VERY UNSTABLE LATE THIS AFTERNOON WITH
VERY LITTLE INHIBITION LEFT ACROSS THE ERN TX PANHANDLE/NWRN TX INTO
WRN OK.  THUNDERSTORMS ARE EXPECTED TO DEVELOP AND MOVE ENEWD ACROSS
THIS REGION THROUGH THE EVENING...WITH SUFFICIENT SHEAR FOR
SUPERCELLS.  LOW LEVEL SHEAR WILL BE ENHANCED NEAR SURFACE OUTFLOW
BOUNDARIES PERSISTING OVER THE AREA.  THIS IS EXPECTED TO INCREASE
THE POTENTIAL FOR A FEW TORNADOES...ESPECIALLY OVER ERN TX
PANHANDLE/NWRN TX.  OTHERWISE...VERY LARGE HAIL AND ISOLATED
DAMAGING WINDS SHOULD ACCOMPANY STRONGER STORMS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24020.


...EVANS

365,0990 335,0993 335,1013 365,1011

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 7:17 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 10 more	88 min
Jun 10, 10:48 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Dewey, Garfield, Grant, Kay and 10 more	87 min
Jun 11, 3:00 PM CDT	Tornado Watch	SPC	Cimarron	6 hr
Jun 11, 5:54 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 12 more	2 hr
Jun 11, 6:52 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 9 more	113 min
Jun 11, 5:28 PM CDT	Mesoscale Discussion	SPC	Crane, Pecos, Terrell, Upton	2 hr

Nearby

Tornado Watches in Texas, 2005 Tornado Watches in Oklahoma, 2005 Every tornado watch in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.