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URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 275

NWS STORM PREDICTION CENTER NORMAN OK

605 PM MDT SUN JUN 6 2010



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST COLORADO

       NORTHEAST NEW MEXICO

       THE WESTERN OKLAHOMA PANHANDLE

       THE WESTERN TEXAS PANHANDLE



EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 605 PM UNTIL

100 AM MDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70

MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.



THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 75

STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES NORTHWEST OF

SPRINGFIELD COLORADO TO 30 MILES SOUTH SOUTHEAST OF TUCUMCARI NEW

MEXICO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU5).



REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE

FAVORABLE FOR 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY

DO PRODUCE TORNADOES.



OTHER WATCH INFORMATION...CONTINUE...WW 274...



DISCUSSION...ONGOING STORMS S OF PUB WILL LIKELY GROW UPSCALE INTO

AN MCS DURING THE EVENING AS STORM MERGERS PROMOTE COLD POOL

FORMATION.  SUPERCELLS WITH LARGE HAIL WILL BE THE INITIAL THREAT

ACROSS SE CO ON THE SRN FRINGE OF THE STRONGER MID-UPPER NWLY FLOW.

THOUGH VERTICAL SHEAR WEAKENS WITH SWD EXTENT...STRONG INSTABILITY

SHOULD MAINTAIN A THREAT FOR DAMAGING WINDS TONIGHT AS CONVECTION

DEVELOPS SEWD INTO THE MOIST SELY UPSLOPE FLOW REGIME ACROSS THE TX

PANHANDLE AND NE NM.



AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM

MOTION VECTOR 33025.





...THOMPSON

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