Charts of the day: Eastern chill will shift westward. Discussion: A large mass of above normal snow cover adheres to north and east Canada creating a nearby cold air mass source region to the East U.S. Medium-range 6-10 Day Forecast Valid Oct. 27-31, 2018 Medium-range 11-15 Day Forecast Valid Nov. 1-5, 2018 Discussion: More chilly weather in the East trailing a storm early in the 6-10 day period. However, a pattern change follows. The cold pattern backs into the West pulled by a series of storms reversing the thermal pattern cooler West while East warms significantly mid-to-late 11-15 day period. Extended-range 16-20 Day Forecast Valid Nov. 6-10, 2018 Discussion: The warmer trend in the East/Southeast continues. Snow cover induced chill shifts to the Rockies. U.S. Medium-range %of Normal Precipitation Forecast Discussion: In the 6-10 day period the storm track leaves the southern U.S. and shifts into the northern states with a potential major storm in the northern Mid-Atlantic States. The storm track shifts into the West-central/Southwest U.S. in the 11-15 day period.