ALASKA EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 243 PM EDT MON AUG 11 2014 VALID 12Z FRI AUG 15 2014 - 12Z TUE AUG 19 2014 THE 11/00Z ECENS/GEFS...11/06Z GEFS AND CORRESPONDING DETERMINISTIC RUNS CONTINUED TO OFFER GOOD RESULTS WITH THE MEDIUM RANGE FLOW PATTERN...SYNOPTIC-SCALE FRONTS AND SENSIBLE WEATHER CHANGES ACROSS THE REGION. WPC GRAPHICS DID NOT STRAY MUCH FROM CONTINUITY THROUGH THE NEW DAY 6 (17/12Z TO 18/06Z) USING A BLEND OF THE ECENS/ECMWF GUIDANCE WITH SLIGHT ASSISTANCE FROM THE GEFS MEANS. THE GEFS/GFS SOLUTION MAINTAINS A SLIGHTLY MORE EQUATORWARD STORM TRACK ACROSS THE NORTH PACIFIC (2 DEGREES AT MOST) AND FIT THE ENSEMBLE SPREAD. FOR DAYS 7-8...FOLLOWED THE ECMWF WITH THE FRONTAL PROGRESSION FROM SOUTHWEST TO NORTHEAST...THROUGH THE SOUTHEAST INTERIOR AND PANHANDLE FOR NOW. THE 11/12Z GFS SOLUTION ALOFT IS A SLIGHTLY SLOWER SOLUTION AT THE MOMENT BEYOND DAY 7. THEREFORE...LITTLE CHANGE IN THE MEDIUM RANGE FORECAST---WITH A DEEP TROUGH AND AN ACTIVE SOUTHWESTERLY FLOW ALOFT IN THE GULF OF ALASKA. 00Z ECMWF RUN HEIGHT ANOMALIES AT THE 500 MB AND 700 MB LEVELS ARE ON THE ORDER OF 2 TO 3 STANDARD DEVIATIONS (SDs) BELOW NORMAL. THE 11/12Z GFS HEIGHT ANOMALIES FOR THE SAME LEVELS WERE A STEADY 2.5 SDs BELOW NORMAL. VOJTESAK