Monday, May 10, 2010

PDS Watch in Oklahoma


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

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