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000 

WWUS20 KWNS 171858

SEL8

SPC WW 171858

COZ000-NMZ000-OKZ000-TXZ000-180200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 558

NWS STORM PREDICTION CENTER NORMAN OK

200 PM CDT TUE JUN 17 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       MUCH OF SOUTHEASTERN COLORADO

       PARTS OF EASTERN NEW MEXICO

       WESTERN PART OF OKLAHOMA PANHANDLE

       WESTERN PART OF TEXAS PANHANDLE



EFFECTIVE THIS TUESDAY AFTERNOON AND EVENING FROM 200 PM UNTIL

900 PM CDT.



HAIL TO 3 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 65

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

NORTHEAST OF LA JUNTA COLORADO TO 40 MILES SOUTH OF TUCUMCARI NEW

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

WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).



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 557...



DISCUSSION...THUNDERSTORMS WILL INCREASE IN NUMBER AND INTENSITY

ALONG AND E OF HIGHER TERRAIN AS STRONG HEATING OF UNSTABLE AIR MASS

CONTINUES.  WITH 40-50KT OF DEEP LAYER SHEAR AND STEEP LAPSE RATES

SEVERE THUNDERSTORMS INCLUDING SUPERCELLS ARE EXPECTED TO DEVELOP

SEWD THRU THE WATCH REMAINDER OF AFTERNOON. VERY LARGE HAIL AND

DAMAGING DOWNBURSTS WINDS WILL BE PRIMARY THREAT...PARTICULARLY WITH

ANY SUPERCELL.



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

TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60

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

MOTION VECTOR 33020.





...HALES

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