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000 

WWUS20 KWNS 112210

SEL0

SPC WW 112210

COZ000-NMZ000-OKZ000-TXZ000-120600-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 510

NWS STORM PREDICTION CENTER NORMAN OK

410 PM MDT WED JUL 11 2007



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EASTERN COLORADO

       NORTHEAST NEW MEXICO

       WESTERN PART OF THE OKLAHOMA PANHANDLE

       WESTERN PART OF THE TEXAS PANHANDLE



EFFECTIVE THIS WEDNESDAY AFTERNOON FROM 410 PM UNTIL MIDNIGHT MDT.



HAIL TO 1.5 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 25 MILES NORTHWEST OF

LIMON COLORADO TO 50 MILES SOUTH SOUTHWEST OF CLAYTON NEW MEXICO.

 FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH

OUTLINE UPDATE (WOUS64 KWNS WOU0).



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 509...



DISCUSSION...TSTMS EXPECTED TO INCREASE IN COVERAGE/STRENGTH ALONG

THE CO FRONT RANGE S INTO NRN NM...WITH ADDITIONAL DEVELOPMENT

POSSIBLE EWD INTO THE PLNS INVOF THE PALMER DIVIDE AND DENVER

CYCLONE.  DEEP SHEAR APPEARS SUFFICIENT FOR SUPERCELLS IN NE PART OF

WW...WITH WEAKER/MORE UNIDIRECTIONAL SHEAR SUGGESTING MULTICELL

CLUSTERS MORE LIKELY FARTHER S.  POTENTIAL WILL EXIST FOR HIGH WIND

AND HAIL GIVEN FAIRLY LARGE T/TD SPREADS AND STEEP MID LVL LAPSE

RATES.



IN NE CO...STRONGER LOW LVL SHEAR AND SMALLER T/TD SPREADS SUGGEST A

SOMEWHAT GREATER SUPERCELL TORNADO POTENTIAL RELATIVE TO POINTS

FARTHER S.  PARTS OF NE CO AND PERHAPS SE WY/SW NEB/NW KS MAY

REQUIRE A TORNADO WW A BIT LATER THIS EVENING IF IT APPEARS THAT

SUSTAINED DISCRETE STORMS WILL DEVELOP ON N SIDE OF DENVER CYCLONE.



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

TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM

MOTION VECTOR 32020.





...CORFIDI

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