ALASKA EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 206 PM EST THU NOV 26 2015 VALID 12Z MON NOV 30 2015 - 12Z FRI DEC 04 2015 ...AN ACTIVE PATTERN WITH DEEP LOWS... ...GUIDANCE/UNCERTAINTY ASSESSMENT... WPC ALASKAN MEDIUM RANGE SURFACE FRONTS/PRESSURES AND 500 MB PROGS ALONG WITH THE HIGH RESOLUTION SENSIBLE WEATHER GRIDS HAVE BEEN PRIMARILY DERIVED FROM A COMPOSITE BLEND OF THE 00 UTC ECMWF WITH THE 06 UTC GEFS MEAN...00 UTC NAEFS MEAN...AND ESPECIALLY THE 00 UTC ECMWF ENSEMBLE MEAN. THE LATTER OFFERS MAX CONTINUITY. FORECAST SPREAD AND UNCERTAINTY SEEM BELOW NORMAL. THE 00 UTC ECMWF WS INCLUDED FOR SOME DETAIL CONSISTENT WITH A PATTERN WITH ABOVE NORMAL OVERALL PREDICTABILITY. THE ECMWF WAS THE DETERMINISTIC MODEL THAT SEEMED THE MOST COMPATABLE WITH THOSE ENSEMBLE MEANS. ...WEATHER THREATS... THIS OVERALL PATTERN HIGHLIGHTS LONG DURATION DEEP LOW DEVELOPMENTS WITH HIGHLY UNSETTLED WEATHER/WINDS FROM THE SRN BERING SEA TO ESPECIALLY ACROSS THE GULF OF AK. THIS WILL ALSO FOCUS A HEAVY PCPN PATTERN INLAND INTO COASTAL SRN AND ESPECIALLY SERN AK AS FURTHER ENHANCED INTO FAVORED TERRAIN. EXPECT MORE MODEST PCPN INTO THE ALEUTIANS/SW AK AND WITH MUCH MORE LIMITED MOISTURE/SNOW AND SOME SURFACE FRONTAL COOLING HOLDING TEMPS DOWN FROM NRN AK INTO/UNDER A MEAN INTERIOR/ERN AK RIDGE ALOFT. SCHICHTEL