

781 

WWUS20 KWNS 262039

SEL9

SPC WW 262039

COZ000-KSZ000-NEZ000-WYZ000-270300-



URGENT - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WATCH NUMBER 519

NWS STORM PREDICTION CENTER NORMAN OK

240 PM MDT FRI JUN 26 2009



THE NWS STORM PREDICTION CENTER HAS ISSUED A

SEVERE THUNDERSTORM WATCH FOR PORTIONS OF



       NORTHEAST COLORADO

       NORTHWEST KANSAS

       WESTERN NEBRASKA

       SOUTHEAST WYOMING



EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 240 PM UNTIL 900

PM MDT.



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 60

STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES EAST

NORTHEAST OF CHADRON NEBRASKA TO 20 MILES SOUTH SOUTHWEST OF

LIMON COLORADO.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE

ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU9).



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 515...WW 516...WW

517...WW 518...



DISCUSSION...THUNDERSTORMS ARE INCREASING ALONG THE FOOTHILLS OF

CENTRAL CO...AND WILL SPREAD EASTWARD THROUGH THE EVENING WITH A

RISK OF LOCALLY DAMAGING WINDS.  OTHER ISOLATED CELLS ARE DEVELOPING

ALONG WEAK SURFACE BOUNDARIES OVER THE NEB PANHANDLE AND EXTREME

NORTHEAST CO.  THESE STORMS WILL TRACK EASTWARD INTO A VERY MOIST

AND UNSTABLE AIRMASS WITH A RISK OF LARGE HAIL AND DAMAGING WINDS.

EVENTUALLY...PARTS OF CENTRAL NEB WATCH MAY NEED TO BE UPGRADED TO A

TORNADO WATCH THIS EVENING.



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 25025.





...HART

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