Could be interesting. First off, Env. Can is calling for periods of snow. I initially discounted it last week. The GFS model is still keeping the precip south of us...but its regional counterpart model, the NAM, is having Ottawa catching the northern edge of the precipitation band as is the European model, the ECMWF as well as having it cold enough to snow.
So now I'm in a bit of a waffle situation...but I'm leaning towards Ottawa getting a few centimeters of snow on Wednesday.