I still don't see it raining tomorrow. There is really no support for it(temperature wise in the 850mb area) in the other models. Notice they don't give a low temp for Sunday. Curious. Anyway, I think Sunday's low temp of about -15C will come in the evening as the cold front comes through Sunday afternoon.
On a side note the Lake Effect snow machine will kick it into high gear this coming week in typical snow belt areas. So if you in the lee of the lakes, look out.
Issued : 3:30 PM EST Friday 18 January 2013
Tonight: Increasing cloudiness. Snow beginning this evening. Amount 5 to 10 cm. Wind becoming south 20 km/h after midnight. Temperature rising to minus 4 by morning.
Saturday: Snow becoming mixed with periods of rain early in the afternoon. Snowfall amount 2 to 4 cm. Wind southwest 20 km/h. High plus 2.
Saturday night: Snow at times mixed with rain. Snowfall amount 2 cm. Local blowing snow. Wind southwest 30 km/h gusting to 60. Low minus 4.
Sunday: A mix of sun and cloud. High minus 2.
Monday: Sunny. Low minus 20. High minus 18.
Tuesday: Sunny. Low minus 25. High minus 21.