ALASKA EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 243 PM EST TUE DEC 06 2016 VALID 12Z SAT DEC 10 2016 - 12Z WED DEC 14 2016 THE SYNOPTIC PATTERN WILL FEATURE ALMOST NOTHING BUT HIGH PRESSURE FOR AK... ALOFT AND AT THE SURFACE. THIS MEANS A RATHER STABLE MEDIUM RANGE PERIOD WITH LITTLE OR NO QPF FOR THE MAJORITY OF THE STATE. AN UPPER RIDGE NORTH OF THE STATE WILL SINK SOUTH THROUGH THE WEEKEND AND EVENTUALLY MERGE WITH AN UPSTREAM RIDGE TO FORM A LARGE DOME OF UPPER HIGH PRESSURE BY EARLY NEXT WEEK. A COUPLE OF VERY STRONG UPSTREAM PAC SYSTEMS WILL ATTEMPT TO KNOCK DOWN THIS POSITIVE ANOMALY BUT WILL NOT SUCCEED. EVEN THOUGH 850 MB TEMPS START OFF ANOMALOUSLY COLD... ESPECIALLY OVER THE SERN/SRN TIER OF THE STATE... GRADUAL MODIFYING WILL OCCUR ACROSS MOST OF THE STATE AND ESPECIALLY ACROSS THE ALEUTIANS LATE IN THE FCST. THE GUIDANCE OVERALL HAS THIS THEME WITH MINOR DIFFERENCES AND WPC STARTED OFF WITH A 12Z GFS AND 00Z/06 ECMWF AND INCLUDED THE 00Z ECMWF MEAN AND 06Z GEFS/NAEFS MEANS MORE AND MORE OVER TIME TO REDUCE THE SMALL SCALE NOISE. MUSHER