Alert archive / Oklahoma / Tornado Watches in 2000

Tornado Watch 246

May 8, 200029 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at May 8, 2000, 6:30 PM CDT for 29 counties in Oklahoma. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: May 8, 2000, 6:30 PM CDT (23:30 UTC)
Expired: May 9, 2000, 12:00 AM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 29 counties

Canadian County, OK, Cleveland County, OK, Comanche County, OK, Craig County, OK, Creek County, OK, Garvin County, OK, Grady County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Washington County, OK

The radar

The Norman radar (KTLX), 4 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

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

Issued	Product	Office	Counties	Lasted
May 8, 7:08 PM CDT	Severe Thunderstorm Warning	OUN	Kay, Noble	37 min
May 8, 7:31 PM CDT	Severe Thunderstorm Warning	TSA	Osage	59 min
May 8, 7:37 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	38 min
May 8, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan	45 min
May 8, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	Noble	45 min
May 8, 8:25 PM CDT	Severe Thunderstorm Warning	TSA	Osage	65 min
May 8, 8:40 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	65 min
May 8, 8:42 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	48 min
May 8, 8:50 PM CDT	Tornado Warning	TSA	Nowata, Washington	25 min
May 8, 8:50 PM CDT	Tornado Warning	TSA	Osage	25 min
May 8, 9:02 PM CDT	Severe Thunderstorm Warning	OUN	Noble	28 min
May 8, 9:29 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	61 min
May 8, 9:34 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	56 min
May 8, 9:38 PM CDT	Severe Thunderstorm Warning	OUN	Noble	52 min
May 8, 9:51 PM CDT	Severe Thunderstorm Warning	TSA	Osage	54 min
May 8, 10:46 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	59 min
May 8, 11:13 PM CDT	Severe Thunderstorm Warning	TSA	Washington	47 min
May 8, 11:29 PM CDT	Severe Thunderstorm Warning	TSA	Nowata	61 min
May 8, 11:45 PM CDT	Severe Thunderstorm Warning	TSA	Osage	60 min
May 8, 11:56 PM CDT	Severe Thunderstorm Warning	TSA	Washington	49 min
May 8, 11:58 PM CDT	Severe Thunderstorm Warning	TSA	Craig	62 min

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.5 hours before the alert went out and 19 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: 2431 J/kg
Mixed-layer CIN: -373 J/kg
Mixed-layer LCL: 1171 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 249 m²/s²
0-3 km storm-relative helicity: 247 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

723 
WWUS9 KMKC 082249
SEL6  

SEL6  
MKC WW 082249
OKZ000-090500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 246
STORM PREDICTION CENTER NORMAN OK
549 PM CDT MON MAY 8 2000

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

   CENTRAL AND EASTERN OKLAHOMA                           

EFFECTIVE THIS MONDAY NIGHT AND TUESDAY MORNING FROM 630 PM UNTIL
MIDNIGHT CDT.

 ...THIS IS A PARTICULARLY DANGEROUS SITUATION...
 
DAMAGING TORNADOES...LARGE HAIL TO 4 INCHES IN DIAMETER...
THUNDERSTORM WIND GUSTS TO 80 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 35 MILES SOUTHEAST OF FORT SILL OKLAHOMA TO 20 MILES
NORTHEAST OF BARTLESVILLE 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.

OTHER WATCH INFORMATION...  CONTINUE...WW 245...

DISCUSSION...STALLED FRONTAL ZONE FROM NERN OK SWWD TO NEAR FSI.
VERY UNSTABLE AIRMASS WITH CAPES TO 5000 J/KG AHEAD OF FRONT ALONG
WITH WEAKENING CAP.  AS STRONG UPPER SYSTEM SPREADS UVV AND COOLING
INTO WRN OK THIS EVENING...STORMS EXPECTED TO RAPIDLY DEVELOP AND
BECOME SEVERE VICINITY OF FRONT.  INITIAL STORMS NOW DEVELOPING
NEAR FSI.  ADDITIONAL STORMS WELL DEVELOP PROGRESSIVELY NEWD FROM
THIS AREA.  VEERING SHEAR PROFILES COUPLED WITH EXTREME INSTABILITY
SUFFICIENT FOR TORNADIC SUPERCELLS ALONG WITH VERY LARGE HAIL. 


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 4 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 600. 
MEAN STORM MOTION VECTOR 24030.


...HALES

341,0990 365,0965 365,0944 341,0965

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.