EXTENDED FORECAST DISCUSSION NWS WEATHER PREDICTION CENTER COLLEGE PARK MD 1105 AM EST SAT JAN 04 2014 VALID 12Z TUE JAN 07 2014 - 12Z SAT JAN 11 2014 THE 4/00Z MODEL CYCLE WAS IN VERY GOOD AGREEMENT WITH PREVIOUS FORECASTS RELATED TO THE ARCTIC BLAST AND TEMPERATURES THAT WILL BE ON THE ORDER OF 20F-40F BELOW NORMAL FOR DAY 3...ACROSS THE NORTHEAST QUARTER OF THE NATION. INDIANA...OHIO AND WESTERN PENNSYLVANIA SHOULD SEE THE HIGHER END ANOMALIES...WITH 20F+ BELOW NORMAL TEMPERATURES EXTENDING INTO THE SOUTHEAST AND MID ATLANTIC REGION. BEYOND DAY 3...THE GFS/GEFS SOLUTION WAS A REASONABLE ALTERNATIVE SOLUTION UNTIL THE END OF DAY 4. IT CONTINUES WITH A FASTER NORTHERN STREAM (PACIFIC WAVE TRAIN) AND BY DAY 6...PHASES TOO MUCH ENERGY WITHIN THE TWO STREAMS...OVER THE NORTH CENTRAL PLAINS. WPC RECOMMENDS USING A 50/50 BLEND OF THE 4/00Z EC ENSEMBLE MEAN AND DETERMINISTIC RUN THROUGH DAY 5...THEN SLOWLY TAPER TO MORE OF A 70/30 BLEND BY DAY 7...TO HANDLE THE INHERENT DIFFERENCES GENERATED WITHIN THE PACIFIC WAVE TRAIN. VOJTESAK