Guido - We don't actually have much snow. My main problem was that my two cal courses are on streets that don't get much traffic (on purpose of course). It snowed yesterday and because it was cold when it snowed and got colder last night, I knew they wouldn't be clear early this morning, and the one in front of my house was not.
I figured freezing paint would be an issue, so the RD was going to follow me to mark the miles. I also wondered if an ink pen was going to work, so I planned to use a pencil instead. SO many things that might go wrong in weather like that.