At the company I worked for a while ago we didn't used to cancel for snowstorms. Then we got a new branch manager. He had made his secretary drive into work in NJ one snowy/icy day. She was killed either coming into work or going home. He never had people come in during snow/ice if he could avoid it after that.
We still did work in the snow though. I recall being at a site on Beverly harbor when we were getting dumped on and the winds were awful. I froze. The ride back to Marlboro in a sketchy hazardous waste truck was not fun