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000 

WWUS20 KWNS 201759

SEL4

SPC WW 201759

COZ000-KSZ000-210100-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 584

NWS STORM PREDICTION CENTER NORMAN OK

1155 AM MDT FRI JUN 20 2008



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       EAST CENTRAL AND SOUTHEAST COLORADO

       WESTERN KANSAS



EFFECTIVE THIS FRIDAY MORNING AND EVENING FROM 1155 AM UNTIL 700

PM MDT.



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 85

STATUTE MILES EITHER SIDE OF A LINE FROM 15 MILES WEST OF PUEBLO

COLORADO TO 45 MILES NORTH NORTHEAST OF DODGE CITY KANSAS.  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.



DISCUSSION...STORMS ARE CONTINUING TO DEVELOP AND INTENSIFY ALONG AN

EAST-WEST LOW LEVEL BOUNDARY ACROSS EAST CENTRAL CO...IN RESPONSE TO

DYNAMIC FORCING FOR ASCENT ASSOCIATED WITH A SEWD MOVING SHORT WAVE

TROUGH MOVING ACROSS WRN NEB.  SURFACE DEW POINTS IN THE 50S COUPLED

WITH STEEP LAPSE RATES ARE RESULTING IN MLCAPE UP TO 1500 J/KG.

30-40 KT NWLY FLOW ABOVE 5-6 KM AGL IS CONTRIBUTING TO SUFFICIENT

EFFECTIVE BULK SHEAR TO SUPPORT SEVERE STORMS INCLUDING SUPERCELLS.

STORMS ARE EXPECTED TO CONTINUE DEVELOPING AND MOVING SEWD THIS

AFTERNOON WITH PRIMARY THREAT FOR VERY LARGE HAIL AND DAMAGING WIND

GUSTS.



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 500. MEAN STORM

MOTION VECTOR 31020.





...WEISS

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