After a warm autumn, a significant pattern change starting meteorological winter. A much colder forecast for the East trending colder during the 6-10/8-12-day period since late last week. Increased snow cover across Southern Canada into the Northern U.S. inspires the effectiveness of the cold air delivery. Significant heating demand, days when the average temperature is >10F colder than normal, is projected Nov. 29-Dec. 5 across both PJM and SERC sectors.