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570 

WWUS20 KWNS 191952

SEL4

SPC WW 191952

COZ000-NMZ000-OKZ000-TXZ000-200300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 604

NWS STORM PREDICTION CENTER NORMAN OK

150 PM MDT SUN JUL 19 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       SOUTHEAST COLORADO

       NORTHEAST NEW MEXICO

       WESTERN OKLAHOMA PANHANDLE

       NORTHWESTERN TEXAS PANHANDLE



EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 150 PM UNTIL 900

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 70

STATUTE MILES EAST AND WEST OF A LINE FROM 45 MILES NORTH

NORTHEAST OF LA JUNTA COLORADO TO 65 MILES WEST SOUTHWEST OF

CANNON AFB NEW MEXICO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE

THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).



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 603...



DISCUSSION...STORMS FORMING OVER THE HIGHER TERRAIN OF SERN CO AND

NERN NM ARE EXPECTED TO DEVELOP SEWD INTO THE SRN HIGH PLAINS. BULK

SHEAR OF 30-40 KT WILL SUPPORT ORGANIZED STRUCTURES INCLUDING

SUPERCELLS...BUT STORMS COULD EVENTUALLY EVOLVE INTO CLUSTERS.

ISOLATED LARGE HAIL AND DAMAGING WIND WILL BE THE PRIMARY THREATS.



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 32035.





...DIAL

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