Alert archive / Oklahoma / Tornado Watches in 2000

Tornado Watch 759

October 22, 200021 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Oct 22, 2000, 6:30 PM CDT for 21 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Oct 22, 2000, 6:30 PM CDT (23:30 UTC)
Expired: Oct 22, 2000, 11:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 21 counties

Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Coal County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK

The radar

The Norman radar (KTLX), 65 km from the middle of the area, began a volume at 23:33 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

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

Issued	Product	Office	Counties	Lasted
Oct 22, 6:48 PM CDT	Severe Thunderstorm Warning	OUN	Grady	57 min
Oct 22, 7:03 PM CDT	Tornado Warning	OUN	Oklahoma	27 min
Oct 22, 7:06 PM CDT	Tornado Warning	OUN	Grady	39 min
Oct 22, 7:26 PM CDT	Tornado Warning	OUN	Oklahoma	34 min
Oct 22, 7:41 PM CDT	Tornado Warning	OUN	Hughes, Seminole	49 min
Oct 22, 8:00 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	45 min
Oct 22, 8:24 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan	51 min
Oct 22, 8:45 PM CDT	Flash Flood Warning	OUN	Cleveland, McClain, Oklahoma	3 hr
Oct 22, 9:14 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	46 min
Oct 22, 10:15 PM CDT	Flash Flood Warning	OUN	Caddo	3 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.5 hours before the alert went out and 63 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: 87 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 493 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 267 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.

701 
WWUS9 KMKC 222317
SEL9  

SEL9  
MKC WW 222312
OKZ000-230400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 759
STORM PREDICTION CENTER NORMAN OK
612 PM CDT SUN OCT 22 2000

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

   CENTRAL OKLAHOMA                           

EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 630 PM UNTIL 1100
PM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 10 MILES WEST NORTHWEST OF ENID OKLAHOMA TO 75 MILES
SOUTH SOUTHEAST OF OKLAHOMA CITY 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...ISOLATED SMALL SUPERCELLS CONTINUE TO FORM OVER
CENTRAL OK AND MOVE NORTHWARD OVER WEAK SURFACE BOUNDARY.  ISOLATED
TORNADOES HAVE ALREADY OCCURRED WITH THESE CELLS...AND FURTHER
TORNADIC POTENTIAL EXISTS.  TORNADOES WILL LIKELY BE BRIEF AND
RATHER WEAK.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. 
MEAN STORM MOTION VECTOR 20030.

...HART

362,0970 342,0960 342,0980 362,0991

Nearby

Tornado Watches in Oklahoma, 2000 Every tornado watch in 2000

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.