Alert archive / Oklahoma / Tornado Watches in 2001

Tornado Watch 761

October 9, 200115 counties in Oklahoma; 13 counties in Texas

The Storm Prediction Center issued this tornado watch at Oct 9, 2001, 2:30 PM CDT for 15 counties in Oklahoma; 13 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Oct 9, 2001, 2:30 PM CDT (19:30 UTC)
Expired: Oct 9, 2001, 9:00 PM CDT
In force: 7 hr
Issued by: the Storm Prediction Center

All 28 counties

Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Baylor County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Wheeler County, TX, Wilbarger County, TX

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Oct 9, 2:37 PM CDT	Tornado Warning	OUN	Beckham	23 min
Oct 9, 2:58 PM CDT	Tornado Warning	OUN	Beckham	32 min
Oct 9, 3:21 PM CDT	Tornado Warning	OUN	Beckham, Roger Mills	24 min
Oct 9, 3:41 PM CDT	Tornado Warning	OUN	Custer	34 min
Oct 9, 3:44 PM CDT	Severe Thunderstorm Warning	OUN	Roger Mills	46 min
Oct 9, 3:58 PM CDT	Tornado Warning	OUN	Beckham	32 min
Oct 9, 4:06 PM CDT	Tornado Warning	OUN	Roger Mills	39 min
Oct 9, 4:16 PM CDT	Severe Thunderstorm Warning	OUN	Custer	44 min
Oct 9, 4:38 PM CDT	Tornado Warning	OUN	Custer, Washita	52 min
Oct 9, 4:44 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	46 min
Oct 9, 4:49 PM CDT	Tornado Warning	OUN	Kiowa	41 min
Oct 9, 5:24 PM CDT	Tornado Warning	OUN	Custer	51 min
Oct 9, 5:25 PM CDT	Tornado Warning	OUN	Kiowa, Washita	50 min
Oct 9, 6:13 PM CDT	Tornado Warning	OUN	Washita	32 min

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 7.5 hours before the alert went out and 176 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: 354 J/kg
Mixed-layer CIN: -163 J/kg
Mixed-layer LCL: 1472 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 78 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.

980 
WWUS9 KMKC 091918
SEL1  

SEL1  
MKC WW 091910
OKZ000-TXZ000-100200-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 761
STORM PREDICTION CENTER NORMAN OK
210 PM CDT TUE OCT 9 2001

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

WESTERN OKLAHOMA                     
NORTHWEST TEXAS 
THE EXTREME EASTERN TEXAS AND OKLAHOMA PANHANDLES                 
     

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 230 PM UNTIL 900
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 ALONG AND 55 STATUTE MILES EAST AND WEST
OF A LINE FROM 75 MILES SOUTH SOUTHEAST OF CHILDRESS TEXAS TO 55
MILES NORTH NORTHEAST OF GAGE OKLAHOMA.

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.

DISCUSSION...THUNDERSTORM INITIATION EXPECTED IN THE NEXT 1-2 HOURS
ALONG THE DRYLINE JUST W OF WRN OK BORDER WITHIN AXIS OF STRONG
INSTABILITY AND WEAKENING CONVECTIVE INHIBITION.  VERTICAL SHEAR
WILL BECOME MORE FAVORABLE FOR SUPERCELLS AS AN EMBEDDED MID-UPPER
LEVEL SPEED MAX APPROACHES FROM ERN NM...WHILE LOW LCL HEIGHTS AND
INCREASING SRH WILL SUPPORTIVE OF SUPERCELL TORNADOES.

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 25025.


...THOMPSON

370,0982 332,0984 332,1004 370,1002

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 9, 5:30 PM CDT	Tornado Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 13 more	4 hr

Nearby

Tornado Watches in Oklahoma, 2001 Tornado Watches in Texas, 2001 Every tornado watch in 2001

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.