A system moves through midweek, ushering in much colder air that transforms rain into snow and brings snowsqualls and potentially hazardous driving conditions on Thursday
The Sault area enjoys a brief warm-up Monday as southwesterly winds push temperatures into the upper single digits Celsius – well above normal for late November. However, a system moves through midweek, ushering in much colder air that transforms rain into snow and brings snowsqualls and potentially hazardous driving conditions on Thursday.
Mostly cloudy Monday with rain developing late in the day as temperatures reach 8°C. Breezy southwest winds will usher in warmer-than-normal temperatures for late November. Heading into the late afternoon, a band of showers develops from southwest to northeast, generally slowly drifting northward into Tuesday. Just a few millimetres of rain is expected overnight as lows near 4°C.
Tuesday brings mostly cloudy skies, 5-10mm of rain, and temperatures reaching 7°C. Showers continue to move northward through the day. A surface low-pressure system and associated cold front bring much colder air into the region Tuesday night into Wednesday. Meanwhile, rain tomorrow night into early Wednesday transitions to a mix of rain and snow, then to snow later Wednesday as the colder air filters in behind the westerly winds.
Wednesday brings rain transitioning to snow, with temperatures reaching 6°C before falling throughout the day. The lake-effect snow machine begins to kick in as early as Wednesday afternoon, as winds shift westerly, eventually becoming more northwesterly into Thursday.
There is a risk of 15-30 cm of snowfall in the northwest and north-northwest snowbelts. The heaviest snow timing will be Wednesday night through Thursday night. Gusty winds are anticipated on Wednesday and continuing through Thursday, with gusts of 55-75 km/h. The combination of strong gusty winds and heavy snowfall rates will bring periods of very low to near-zero visibility, blowing and drifting snow, and hazardous to dangerous driving conditions later Wednesday through Thursday night.
Daytime highs will only reach -3°C on Thursday, then fall to near -6°C on Friday as the snowsquall activity ends and we see a chance of sunshine.
