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312 

WWUS20 KWNS 291852

SEL5

SPC WW 291852

COZ000-NMZ000-OKZ000-TXZ000-300200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 635

NWS STORM PREDICTION CENTER NORMAN OK

1250 PM MDT WED JUL 29 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST COLORADO

       NORTHEAST NEW MEXICO

       FAR WESTERN OKLAHOMA PANHANDLE

       WESTERN TEXAS PANHANDLE



EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 1250 PM UNTIL

800 PM 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 80

STATUTE MILES EAST AND WEST OF A LINE FROM 40 MILES NORTH OF LA

JUNTA COLORADO TO 20 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 634...



DISCUSSION...SHORTWAVE TROUGH MOVING OUT OF THE CENTRAL ROCKIES WILL

CONTINUE TO SUPPORT SSEWD MOVING TSTMS ACROSS WW THROUGH THE

EVENING.  AS AIRMASS DESTABILIZES AND CAP WEAKENS OVER THE HIGH

PLAINS...SEVERE THUNDERSTORM THREAT SHOULD SPREAD SEWD WITH TIME.

SHEAR WILL BE SUPPORTIVE OF SUPERCELLS...WITH SPLITTING STORMS

LIKELY WITH STRAIGHT-LINE HODOGRAPHS.  AN ISOLATED/BRIEF TORNADO IS

POSSIBLE... HOWEVER LARGE HAIL AND ISOLATED DAMAGING WINDS SHOULD BE

PRIMARY SEVERE THREATS INTO THE EARLY EVENING.



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 500. MEAN STORM

MOTION VECTOR 30015.





...EVANS

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