ALASKA EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 320 PM EST TUE NOV 10 2015 VALID 12Z SAT NOV 14 2015 - 12Z WED NOV 18 2015 ...GUIDANCE/UNCERTAINTY ASSESSMENT... THE WPC ALASKAN MEDIUM RANGE PRODUCT SUITE HAS BEEN PRIMARILY DERIVED FROM A COMPOSITE BLEND OF REASONABLY COMPATABLE GUIDANCE FROM THE 06 UTC GEFS MEAN AND 00 UTC NAEFS/ECMWF ENSEMBLE MEANS. DETERMINISTIC GUIDANCE OFFERS GREATER RUN TO RUN EMBEDDED SYSTEM TIMING/EMPHASIS VARIANCE...SO OVERALL MID-SMALLER SCALE FLOW PREDICTABILITY IS JUST AVERAGE. THE NEW 12 UTC ECMWF IS AT LEAST NOW DECENTLY IN LINE WITH THE WPC BLEND. ...WEATHER HIGHLIGHTS... LINGERING LEAD LOW ENERGIES AND PCPN OVER THE ERN GULF OF AK/SERN AK INTO THE WEEKEND WILL GIVE WAY TO THE UPSTREAM APPROACH OF YET ANOTHER POTENT SYSTEM EXPECTED TO TRACK FROM THE BERING SEA/WRN AK SATURDAY SEWD THROUGH THE ALEUTIANS/SWRN AK TO THE GULF OF AK SUN THROUGH EARLY-MID NEXT WEEK. THIS SYSTEM MAY PROVE ANOTHER SIGNIFICANT WIND/WEATHER/WAVES PRODUCER ACROSS THE REGION WITH HEAVIEST PCPN POTENTIAL ONSHORE OVER SRN/SERN AK. THERE ARE SEVERAL POTENTIAL REINFORCING AND/OR SEPARATE ORGANIZED ADDITIONAL SYSTEMS THAT WORK UPSTREAM IN PROGRESSIVE FLOW BACK INTO THE BERING SEA EARLY THROUGH MID-NEXT WEEK...BUT FORECAST SPREAD/UNCERTAINTY IS GREATER THAN NORMAL WITH THESE FEATURES. OVERTOP...EXPECT CONTINUED COOLING AND SOME LOCALLY UNSETTLED WEATHER/LIMITED PCPN UNDERNEATH MEAN ARCTIC/BERING STRAIT TO NRN AK/INTERIOR TROUGH ALOFT THAT IS PERIODICALLY REINFORCED BY A SERIES OF NRN STREAM IMPULSES. SCHICHTEL