Well aren't you lucky that I'm here. I actually live a 5 minute walk from a Belgian ski hill.
OK, it's not the alps but it is a sub-alpine climate and I live at 2000 feet, which although is low we usally get a few feet of snow and this winter is gearing up to be a BIG one (first year I lived out here I didn't see the grass for 5 months - nobody ever things of Belgium as being snowy - but believe me it is!). The locals are all in a tizz and buying up firewood by the truckload.
It's not a massive resort by any means, but if you just want a day out of Brussels (75 minute drive) then it's great. The pistes are probably 75m wide and maybe 1.2km long. There's a green, a blue and a red run and the red is actually surprisingly steep (for Belgium!). Put it this way, I tried to ride my horse up it and the saddle slipped a foot backwards and I nearly slid off over the tail!
Lift ticket is one euro per go which is great.
Website here: http://www.skialpin-ovifat.com/
Alternatively at Landgraaf in The Netherlands (again 75 minutes from Brussels) there lies the "best" snowdome in Europe, if not the world. 520m pistes, 6-man chair lift & genuine piste-bashers.http://www.snowworld.nl
Or... you get in your car - 8 hours to Geneva, ~7 to Val D'Isere. Or you take the ski train from Brussels & spend 10 hours being trodden on hundreds of foreigners.
We didn't get much snow last winter - very warm in Europe all over - maybe 5 days tops. It's been below zero here at night for around a week and the animals are looking distinctly hairy already and it's only mid-September! This winter is going to be HARSH!