Is it Ventusky.com
I wouldn't rely on it too much. I looked at it while the snow was falling earlier this afternoon, and it said we weren't having any.
Clover when you look at the snow cover play it shows when the snow is "due" and when it will lie. The graphics for snow cover show predictions for snow lie at a given time. Precipitation forecast will give an idea of when snow or rain is forecast if you look at the temp. readings.
This is the one I use which I think is very good.
Using google put in Snow/rain radar map and when it comes up scroll down the page and click on snow-rain uk. Hope you will find this one useful.