ALASKA EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 256 PM EDT WED OCT 07 2015 VALID 12Z SUN OCT 11 2015 - 12Z THU OCT 15 2015 ...HEAVY WIND/WAVES/PRECIPITATION ON TAP WITH SEVERAL EX-TROPICAL LOWS... THE WPC ALASKAN MEDIUM RANGE PRODUCT SUITE WAS PRIMARILY DERIVED FROM A BLEND OF REASONABLY COMPATABLE GUIDANCE FROM THE 06 UTC GEFS MEAN AND 00 UTC ECMWF ENSEMBLE MEAN ALONG WITH ADDED DETAIL AS PER THE 00 UC ECMWF THAT SEEMS BETTER CLUSTERED WITH THESE ENSEMBLES THAN THE 12 UTC GFS. THIS SOLUTION EXTENDS FROM THE LATEST CENTRAL PACIFIC HURRICANE CENTER (CPHC) FORECAST TRACK FOR HURRICANE OHO. OHO IS FORECAST TO BECOME EXTRATROPICAL WHILE LIFTING NNEWD FROM A POSITION NOW NE OF HAWAII TO THE FAR ERN GULF OF ALASKA THIS WEEKEND WHERE IT SHOULD EVENTUALLY BE ABSORBED/PHASED BY ANOTHER GULF SYSTEM/LOW. THIS JUICY SYSTEM WILL FAVOR HEAVY SE AK CENTERED PCPN ENHANCED BY INFLOW INTO TERRAIN. WEAKER NRN STREAM LOW/TROUGH ENERGIES MEANWHILE THIS WEEKEND DIG SEWD OVER THE NRN BERING STRAIT/SEA INTO WRN ALASKA BEFORE REACHING THE NRN GULF OF AK EARLY NEXT WEEK AND INTERACT WITH LEAD SYSTEM FLOW. THIS SUPPORTS MODEST WRN/SWRN INTERIOR TO HEAVIER SRN AK TERRAIN BASED PCPN. LATER...TROPICAL STORM CHOI-WAN IS ALSO SPINNING OVER THE WRN PACIFIC AND IS FORECAST TO LIFT INTO HIGHER LATITUDES AND BECOME AN POTENT EXTRATROPICAL LOW THAT IS EXPECTED TO THREATEN FROM THE WRN ALEUTIANS MON TO SW/SRN AK IN ABOUT A WEEK TO SUPPORT ANOTHER EPISODE OF LOCALLY STORMY WEATHER WITH HEAVY RAINFALL POTENTIAL. SCHICHTEL