Many in Southern California deal with snow and snow conditions so infrequently they forget that at 9,000 feet temperatures can easily drop to _120 F and to below _200 F above timberline. The annual average snowfall in the San Bernardino National Forest is about 6 feet and has reached 15 feet. Snow with gale winds can produce a "whiteout" and bring wind-chills to below -500 F.