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795 

WWUS20 KWNS 171856

SEL2

SPC WW 171856

COZ000-180200-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 492

NWS STORM PREDICTION CENTER NORMAN OK

155 PM CDT FRI JUN 17 2011



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       LARGE PART OF EASTERN COLORADO



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 155 PM UNTIL 900

PM CDT.



HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80

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 55 MILES NORTH

NORTHEAST OF LIMON COLORADO TO 20 MILES SOUTH OF LA JUNTA

COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).



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 490...WW 491...



DISCUSSION...THUNDERSTORMS ARE INCREASING E OF FRONT RANGE IN AREA

OF GREATEST DESTABILIZATION AND VEERING SHEAR PROFILES.  WITH

CONTINUED HEATING BOTH INSTABILITY AND SHEAR EXPECTED TO INCREASE

THRU THE AFTERNOON WITH SEVERE THUNDERSTORMS DEVELOPING EWD ACROSS

THE WATCH.  SUPERCELLS ARE LIKELY WITH PRIMARY THREAT OF LARGE HAIL

AND DAMAGING WIND.  HOWEVER POTENTIAL EXISTS FOR LANDSPOUTS AND

BRIEF TORNADOES WITH ANY SUPERCELL.



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

TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70

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

MOTION VECTOR 26025.





...HALES

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