A second, weaker storm system will quickly track toward the Northeast and re-intensify on Wednesday spreading some snow into eastern and Atlantic Canada once again later Wednesday and Wednesday night.
This system will be a warmer event so that this will be mostly rain over the southern two-thirds of Nova Scotia, while the heaviest band of snow will likely cut across New Brunswick, PEI and northern Cape Breton.
A small clipper storm will bring a general 5-10 cm of snow to south-central Saskatchewan late tonight into Wednesday, including the Saskatoon to Regina area.
The combination of a strengthening low pressure system cutting up toward the western Great Lakes and a powerful jet stream moving overhead will set the stage for a possible high wind event Thursday night over southern Ontario and up along the north shore of Lake Ontario.
Southerly winds Thursday night could gust between 70 and 90 km/h over the region.
The southerly winds will also bring in the mild air and combined with the heavier rainfall from Wednesday afternoon through the evening there is the potential for street flooding with the snow pack in place.
The final in a series of very moist, Pacific storm systems will impact BC Wednesday night into Thursday with heavy rain along the coast and another dump of snow for the mountains.
There has been a total of 124 cm (~50 inches) of new snow over the past week at Whistler/Blackcomb ski resort in BC.
There has also been 77 mm (~3 inches) of rain in Vancouver, BC over the past week.
Post from earlier today....
I do not have any major changes to the snow map I issued earlier yesterday for the Maritimes. However, I can see a narrow strip of 15-20 cm snow running from extreme southern New Brunswick, through extreme northern Nova Scotia and into PEI with the snow tonight. (Tue night).
This looks like a 5-10 cm snow event for the Avalon Peninsula (St. John's) of Newfoundland on Wednesday.
A second storm system will quickly follow on it's heels, bringing another round of steady precipitation from Quebec into the Maritimes Wed/Wed night. This second storm will be a warmer storm so that much of Nova Scotia will end up as rain, while another 8-15 cm of snow could accumulate over New Brunswick, especially central parts Wednesday night. Will post a map later on that.
Arctic air and polar vortex coming back into the eastern half of the country next week
There are signs of a cross-polar flow forming early next week (air coming directly south from the pole to southern Canada), which could deliver another round of bitterly cold air from the eastern Prairies to eastern Canada. Looks like the worst of the cold comes into eastern Canada during the middle of next week.
Latest interpretation of the ECMWF/CFSv2 long range.......
Strong thunderstorms for parts of Ontario Tuesday afternoon and a look at the overall weather pattern across Canada and the U.S. for this week.
My latest interpretation of the ECMWF forecast model, along with some input from other models and current data.
Some thoughts on the weather pattern into mid-July
Wildfire smoke causing significant problems across Saskatchewan.
Spring-like storm to soak parts of eastern and Atlantic Canada this weekend as the West cooks.
Heat wave for western Canada by the weekend as the East cools down a bit.