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WWUS20 KWNS 182036

SEL6

SPC WW 182036

NMZ000-OKZ000-TXZ000-190400-



URGENT - IMMEDIATE BROADCAST REQUESTED

TORNADO WATCH NUMBER 186

NWS STORM PREDICTION CENTER NORMAN OK

335 PM CDT TUE MAY 18 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

TORNADO WATCH FOR PORTIONS OF



       PARTS OF NORTHEAST NEW MEXICO

       OKLAHOMA PANHANDLE

       MUCH OF TEXAS PANHANDLE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 335 PM UNTIL

1100 PM CDT.



TORNADOES...HAIL TO 3.5 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 125 STATUTE

MILES EAST AND WEST OF A LINE FROM 50 MILES WEST NORTHWEST OF

GUYMON OKLAHOMA TO 45 MILES SOUTHWEST OF AMARILLO TEXAS.  FOR A

COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE

UPDATE (WOUS64 KWNS WOU6).



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 185...



DISCUSSION...SEVERE THUNDERSTORMS EXPECTED TO DEVELOP OFF HIGHER

TERRAIN NERN NM AHEAD OF S/WV TROUGH APPROACHING THE AREA FROM THE

WEST.  AIR MASS HAS BECOME MDTLY UNSTABLE WITH MLCAPES TO 2000 J/KG.

COUPLED WITH STEEP LAPSE RATES AND FAVORABLE VEERING SHEAR

PROFILES...SUPERCELLS WILL DEVELOP WITH THREAT OF VERY LARGE HAIL

AND POSSIBLE TORNADOES AS THEY MOVE EWD.



AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL

SURFACE AND ALOFT TO 3.5 INCHES. EXTREME TURBULENCE AND SURFACE

WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO

500. MEAN STORM MOTION VECTOR 25030.





...HALES

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