An early-season polar front likely dropping south through the Prairies early next week will send temperatures on a nosedive across the region with the potential for some snow.
The two ECMWF forecast model maps below shows near surface temperatures for Monday afternoon and Tuesday afternoon in degrees C.
Once the colder air moves in the combination of an upper-level disturbance and a weak, upslope flow will lead to light to moderate precipitation late Monday into Tuesday with a change to snow first in the Alberta mountains and foothills then perhaps even getting into the prairie as far east as Saskatchewan early Tuesday.
The ECMWF forecast model valid Tuesday below shows where there is the potential for frozen precipitation (snow) in blue.
Keep in mind, even if there is snow in the Prairie Tuesday, most of it will just melt on roads. I do think there is a much higher potential for accumulation above 4,500 feet in southwestern Alberta.
Regardless of the snow, next week is going to be unusually chilly by September standards across the Prairies. There may be just enough clouds and wind to prevent widespread frost/freeze, but we will have a better idea on that in a few days.
Here is my latest interpretation of the weekly ECMWF long-range forecast model output into the first week of October.
You can also follow me for updates on my twitter @BrettAWX
Update on major eastern storm into the weekend.
Major storm system will bring heavy rain, followed by strong winds, falling temperatures and possible high elevation snow into this weekend over the East.
The 2016/2017 winter forecast for Canada has a snowy look for many.
Early November not looking all that cold, but that could change quickly later in the month.
Update on the two major storm systems approaching the West coast for late this week.
Two significant storms will bring widespread, heavy rain and strong winds to southwest British Columbia later Thursday and again late Saturday.