Our forecasting team is tracking an overachieving Clipper system tracking through the Lower Great Lakes Overnight. Dissipating West to East through Sunday AM.
A quick burst of snow begins near midnight tonight, persisting through the pre-dawn hours (5-6am) Sunday morning. Generally, 3-8cm is expected. Due to the nature of clipper systems amounts will vary throughout the forecast area.
Wind gusts to 60-70km/h are expected along the north shore of Lake Erie (along the Niagara Peninsula), early Sunday morning. Watch for local blowing snow and poor travel in the area.
Exercise caution if you are travelling early Sunday morning. Since it is a weekend, little impact to transportation is anticipated.
Winter returns to the Great Lakes, after an extended lull in activity and cold air between December and early January. Find out where, and, how bad the ‘next one’ will be.
An area of low-pressure tracks through Illinois late this evening. Tracking through Michigan & Northeast Ontario by Wednesday afternoon & evening. Precipitation begins as snow across Central, Northeastern, and much of Southwestern Ontario Tuesday evening.
Freezing rain and ice pellets begin after 9pm across the Windsor – Sarnia corridor. Changing to rain, with little impact. Freezing rain spreads north of Lake Erie through the overnight. 3-6 hours of freezing rain is expected before changing over to rain.
Snowfall continues across much of Central, Southwestern, and Eastern Ontario overnight into Wednesday morning. A lull in snow develops across the 400 corridor near 7am. Lowering snowfall totals across Southern Simcoe county; risk of freezing drizzle.
South of the 401/402 changes over to all rain during the early morning. Freezing rain continues along the escarpment (West of Lake Ontario). A changeover to rain continues North & East throughout the afternoon, proceeded by brief freezing rain.
Snow continues North of Lake Simcoe and North of Ottawa through the afternoon. A extended period (5-8 hours) of freezing rain develops Wednesday afternoon in Montreal, after a period of snow. Conditions will be hazardous in the City.
A primarily snow event stretching from Bruce and Huron county’s through Georgian Bay. Also, putting parts of Eastern and Northeastern Ontario in a swath of 15-25cm. Little accumulation north of Lake Erie, but watch for icing with the potential of 5-8mm of accretion before the changeover to rain. 2-4cm of snow across the GTA, with brief freezing rain. A larger swath of 5-10cm of snow is expected across the light blue shaded area on our forecast map.
Frigid Air and Heavy Squalls Loom
The winter across Canada for many this season is expected to be cold, particularly for Saskatchewan, Manitoba, Ontario, and Quebec.
Through careful analysis of meteorological data, we have compiled a preliminary forecast for the winter across Canada for this winter. We will issue an updated version, should the situation warrant, in December.
For many places, we expect an early start to winter. Some places in Manitoba have already received accumulating snow. For Southern Ontario, we expect accumulating snow perhaps as early as late October.
– Frigid & Snowy Winter for Saskatchewan and Manitoba
– Cold & Stormy for Ontario and Quebec
– Potentially Historic Squalls for Great Lakes (NW and W Flow)
– Several Winter Storms for Maritimes and NL but Not All Snow
For this winter BC is expected to receive a relatively typical winter season. Normal precipitation amounts with normal temperatures will be present in the region. While a few colder outbreaks are certainly likely with some snow getting into the mainland, we expect nothing out of the ordinary.
From Alberta to Saskatchewan to Manitoba, we expect a frigid winter overall. While Alberta is expected to receive moderating temperatures throughout the winter from Pacific air flows, Saskatchewan and Manitoba are expected to be exceptionally cold, and at times, record-breaking with several rounds of ‘deep-freezes’. Precipitation is expected to be slightly above normal for Alberta, and above normal for Saskatchewan and Manitoba.
Ontario & Quebec
Ontario is expected to be overall, cold this winter. Northwestern and Northern Ontario are expected to parallel the frigid air likewise to the Prairies. With the set-up of the storm track this winter, we expect more rounds of Colorado and Texas lows to infiltrate the Great Lakes and Southern Quebec for the first time in what has seemed to be a number of years.
The cold air from Manitoba and Saskatchewan will provide flourishing variables to allow a well-above and significantly active lake-effect season in an NW to W flow. Preliminary indications represent a repeat of December 2010 across the region.
Quebec is expected to receive above-normal snowfall this year as several storms track through the interior NE of the USA this year. Temperatures will become vastly more frigid through Northern regions of the province.
Maritimes and Newfoundland & Labrador
While the Maritimes and NL are expected to be active this year, it is expected at times, slightly milder air will target the regions, therefore, not all systems this year will be snow-makers. The regions will certainly be stormy this year, but several storms may end up more of a ‘wintry-mix’, rather than snowstorms. Temperatures will be slightly more moderated at times, although at times, cold bouts are certainly likely.
The Yukon is expected to receive slight benefits from Pacific air and a slight ridge at times over Western Canada/Western USA, providing relief at times relative to the typical winter in the region. Conversely, NWT and Nunavut are expected to receive normal precipitation
Damage to sensitive crops is possible tonight.
Frost may damage some crops in frost-prone areas.
A ridge of high pressure building over the prairies will bring clear skies and cold overnight lows to Saskatchewan Tuesday night. Overnight lows are expected to be between 0 and -3 Celsius by Wednesday morning.
Special Weather Statement for Saskatchewan
Frost may damage some crops in frost-prone areas.
Overnight lows are expected to reach near the freezing mark. Frost is possible overnight.
Take preventative measures to protect frost-sensitive plants and trees.
Frost advisories are issued when temperatures are expected to reach the freezing mark during the growing season, leading to potential damage and destruction to plants and crops.
Special Weather Statement for Alberta