Tornado Watch 259

Issued

May 8, 2007, 5:29 PM CDT (22:29 UTC)

Expired

May 8, 2007, 10:00 PM CDT

In force

5 hr

Issued by

the Storm Prediction Center

Largest hail expected

1.5 in

Strongest gust expected

60 kt

Two or more tornadoes

40%

One or more EF2 to EF5 tornadoes

10%

Ten or more severe wind reports

30%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

40%

One or more hailstones of 2 inches or more

20%

Six or more combined severe hail and wind reports

70%

• Mesoscale Discussion 754May 8, 2:46 PM CDT
• Mesoscale Discussion 755May 8, 5:09 PM CDT
• Mesoscale Discussion 757May 8, 7:30 PM CDT

000
WWUS20 KWNS 082235
SEL9  
SPC WW 082235
OKZ000-TXZ000-090300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 259
NWS STORM PREDICTION CENTER NORMAN OK
530 PM CDT TUE MAY 8 2007

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

       SOUTHWEST OKLAHOMA
       NORTHWEST AND NORTH CENTRAL TEXAS

EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 530 PM UNTIL
1000 PM CDT.

TORNADOES...HAIL TO 1.5 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 60 MILES WEST OF MINERAL WELLS
TEXAS TO 20 MILES NORTH OF FORT SILL OKLAHOMA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU9).

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 257...WW 258...

DISCUSSION...SCTD DISCRETE STORMS/SMALL SUPERCELLS HAVE FORMED OVER
NW TX IN HEATED AREA AHEAD OF W TX MCS.  ENHANCED SLY LLJ/ASCENT
EXISTS AHEAD OF MCS.  COUPLED WITH BACKED NEAR-SFC FLOW N OF W-E
ORIENTED OUTFLOW BOUNDARY OVER N TX...AND MOIST ENVIRONMENT INVOF
BOUNDARY...SETUP SUGGESTS A POTENTIAL FOR TORNADOES UNTIL MCS
OUTFLOW OVERTAKES REGION LATER THIS EVENING.  ISOLATED TORNADOES MAY
ALSO OCCUR NEAR INTERSECTION OF MCS LEADING EDGE WITH OUTFLOW
BOUNDARY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 21025.


...CORFIDI

Tornado Watches in Texas, 2007Tornado Watches in Oklahoma, 2007Every tornado watch in 2007

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.