Copious snowfall in November and December has been sufficient to sustain regional ski resorts through a recent spate of dry weather, resort officials said Wednesday. The early snowfall has created a large snowpack base, meaning that much of the mountain terrain has stayed open and the ski lifts have continued to spin in advance of President’s Day weekend, the last big holiday weekend for the resorts. “It’s been exponentially better than last year,” said Jenny Kendrick, spokeswoman for Alpine Meadows. “We had one of our best days of the year just last weekend.” Kendrick said the additional snowfall of approximately …