One last cold weekend of the season for Montreal

WINTER JUST WON'T LEAVE: A late season snow fell across the foothills of the Rockies in southern Alberta on Friday.(CBC Calgary)

The weather roller coaster we have been on over the last month here in Montreal, will take one more dip this weekend before mild air returns. The warm air of Thursday was replaced by clouds and showers Friday, as a cold front swept across southern Quebec. An upper level low pressure system, spinning north of the Great Lakes, will send another stronger cold front across the region Saturday. Temperatures will cool down rapidly behind the front Saturday night, and only rise to 7C (45F) on Sunday, about 12 degrees below normal. The front will be accompanied by showers and thunderstorms and then followed by gusty and cold northwest winds. The good news is that the cold air will be around for less than 48 hours before a warming trend begins Tuesday. Milder air will return over the course of the upcoming week and remain in place for the first official long weekend of the summer.

The cold air has prompted frost warnings across a large portion of the upper Midwest into central Ontario. Snow is even in the forecast for far northern Ontario and northwestern Quebec, close to Hudson Bay. The cold air may even produce some flurries across the highest elevations of southern Quebec and northern New England by Sunday morning.