Rainy & cool week ahead

Showers on Saturday left us with this perfect rainbow late in the day on L'Ile Perrot. Sunday featured a deep blue sky and mild weather, but it will be awhile before we see the sun again. (ValleyWX)

A very slow moving low pressure area developing across the northern Great Lakes will shift east into southern Quebec by the end of this week. Deep tropical moisture is streaming northward into the system from the Gulf of Mexico. The result will be a wet and windy week for many of us. Rain will develop early this morning in the St. Lawrence Valley and spread north and east. The rain may be heavy at times with a general 15-25mm (1 inch) forecast by Tuesday afternoon. Higher amounts are forecast across the lower Laurentians, up to 50mm (2 inches), a warning is in effect for that area. Temperatures will remain relatively steady at 9C (49F) in metro Montreal. Winds will also increase out of the northeast and reach speeds of 50km/h later today. Wind gusts are expected to reach up to 90km/h (50mph) over the higher elevations of the Green Mountain and Adirondacks. Wind advisories have been posted in those regions.

The cloudy, cool and wet weather will linger through most of this week with high temperatures no better than 10 or 12C (50 to 54F). Overnight lows will be around 4C (39F) in Montreal. The unstable, cool weather will result in cloudy skies lingering into the later portion of the week and perhaps even next weekend with scattered showers and even a rumble of thunder in Montreal. There is also the possibility of a snow shower across the higher elevations north and south of the city.