The first half of November has been uniformly warm and and in most places much drier than normal. November snow quotes below are from areas with traditionally high snowfall..
California: Sierra snowfall has been less than one foot so far. Mammoth has one run open with snowmaking assistance. See Current California Ski Conditions for more details on Southern California and Mammoth.
Pacific Northwest: Some snow accumulated in late October, but snow levels have since been high and rain has prevailed in November at Washington and Oregon ski areas. Whistler has a 2-3 foot snow base in the alpine but has had all rain at mid and lower elevations. It will not open until snow is skiable down to 4,000 feet elevation.
Canadian Rockies and Interior B.C.: Lake Louise has some snowmaking runs. Big White had the most natural snow skiing in North America, opening 20 % of the mountain Oct. 27 on a 20-35 inch base, but is closing this weekend with a deteriorating base. Fernie also had October snow, but it has been washed away recently by rain up to 2,000 feet above the base area.
U. S. Northern Rockies: November snowfall has been only 8 inches at Grand Targhee and 5 inches at Jackson Hole.
Utah: Alta has only a 7-inch base on 26 inches snowfall, most of it in October.
Northern and Central Colorado: Winter Park has received 12 inches natural snow. Loveland, Keystone and Copper are open, but it's a handful of trails strictly on snowmaking.
Southern and Western Colorado: Wolf Creek's season-to-date snowfall is only 14 inches.
Northeast: Snowmaking leaders Killington, Okemo, Sunday River and Hunter Mt. have just a few trails open on snowmaking. No eastern area opened in October for the first time in many years. I strongly recommend checking Scenes of Vermont Ski Page or First Tracks Online Ski Magazine No-Bull Ski Reports for up to date information in this region, where both weather and surface conditions can change so rapidly.