The half that I was going to watch tomorrow, Helsby Four Villages, is also off, and judging by the photos it is not a surprise:
http://www.flickr.com/photos/runhelsby
Actually there has hardly been any snow, but was there is has turned to quite treacherous ice. Struggled on my run today and it was little faster than walking due to the underfoot conditions. Whilst on the road you wouldn't have known it! Another 15 minutes booked, so have to be pleased with that. (And talking of perspiration, don't think I have had any for over a year!)