After six weeks of polar vortex -20 to -35C we finally got a chinook (warm westerly winds ) for the last two weeks. This resulted in snow melting temperatures for several days, and minus single digits. Now we are going to have a bit more arctic air but nothing colder than -15 C for a few days and then we warm up again. However this is happening because the cold is moving east over the prairie provinces and is going to spill into Ontario et al and the Eastern US. Cue the wringing of hands and gnashing of teeth!