it s been since the 70s. san francisco, they did get snow but it s not like they needed mr. plow. it was a little touch. but still, snow is snow and they certainly had it. away from san francisco, farther down the coastline and in higher elevationses, sierra nevada, more than flurries. some places we could see several feet of snow, not only the sierra nevada mountains, wasatch range. central rockies one to two feet. it s going to be a weekend event. it s going to be today and tomorrow. fizzling out as we get into monday. but the big weathermaker, the thing that s making all that happen is the cold air obviously coming in from the north but also this area of low pressure that frontal boundary one of the major cal lifts giving us that possibility of heavy snowfall. for parts of the great lakes, this area of low pressure will enhance that west to east flow of wind across parts of lake michigan. you could see an inch of snow. nothing too heavy there.