EC is predicting a high of +12 degrees tomorrow. So is TWN which is troubling... But it's only the Canadian model that is showing that high of a temp. The Euro, GFS and NAM show temps in the mid single digits. In fact the GFS and NAM show Thursday warmer than Wednesday. EC has +8 and +7 C as the high and low temp respectively on Thursday. So, my prediction:
Wednesday: High temp of +6C and a low of -4C reached early in the morning.
Thursday: High temp of +8C and a low of -1C reached late Thursday as the cold front comes through
Light snow shower on Friday as a very weak clipper passes through and a brisk north wind.
Let's see who's more accurate.