

870 

WWUS20 KWNS 101827

SEL7

SPC WW 101827

KSZ000-OKZ000-110300-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 147

NWS STORM PREDICTION CENTER NORMAN OK

125 PM CDT MON MAY 10 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       SOUTH CENTRAL KANSAS

       CENTRAL AND WESTERN OKLAHOMA



EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 125 PM UNTIL

1000 PM CDT.



...THIS IS A PARTICULARLY DANGEROUS SITUATION...



DESTRUCTIVE 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 APPROXIMATELY ALONG AND 95 STATUTE

MILES EAST AND WEST OF A LINE FROM 40 MILES SOUTH SOUTHEAST OF

FORT SILL OKLAHOMA TO 25 MILES NORTH NORTHEAST OF WICHITA KANSAS.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU7).



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 146...



DISCUSSION...AN DANGEROUS ENVIRONMENT IS DEVELOPING ACROSS PARTS OF

SOUTHERN KS AND WESTERN/CENTRAL OK THIS AFTERNOON AS AIRMASS RAPIDLY

DESTABILIZES AND UPPER TROUGH APPROACHES.  THUNDERSTORMS ARE

EXPECTED TO INITIALLY DEVELOP ALONG THE SURFACE DRYLINE OVER WESTERN

OK...THEN PROGRESSING EASTWARD THROUGH THE LATE AFTERNOON AND

EVENING.  TORNADIC SUPERCELLS ARE A DISTINCT POSSIBILITY WITH THE

THREAT OF STRONG AND LONG-TRACK TORNADOES.  VERY LARGE HAIL IS ALSO

LIKELY IN THE STRONGER CELLS.



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

500. MEAN STORM MOTION VECTOR 25045.





...HART

