Snowing Cats and Dogs?

I've been told you can't say snowing cats and dogs. But I don't know what the snow equivalent of this expression is. Haven't really had to describe such a situation in Melbourne. Anyway, let's just pretend it's a valid expression. So, it was snowing cats and dogs last weekend. We opened the blinds on Saturday morning to be greeted by snow and went to bed on Sunday night whilst the snow continued falling outside. It's the heaviest snowfall we've seen in Holland since we moved here. It's very pretty and quite special when it snows. Even the Dutch get excited by it because it doesn't happen very often anymore due to global warming. It can be quite stressful as well. Traffic comes to a crawl, cars slide and lose grip, and it's quite slippery walking around as well. We were caught in the snow whilst driving back from Belgium last weekend and a journey that was meant to take 1.5 hours took double the time. Here are some snaps of the streetscape outside our apartment.