Author: Jordin Lantos

Ontario

Departure of Spring; Winter to Make a Fierce Return…


Heavy Snow and Blowing Snow for Parts of Southern Thursday into Friday.

 

As expected, we are watching for the continued evolution of a series of complex forms of energy dispersing from the Northern Prairies & USA, and strengthening near the Great Lakes bringing mostly heavy snow, some freezing rain (near Lake Erie), and some rain (mainly Ex. SW Ontario).

Rain should be almost exclusively present towards Extreme Southwestern Ontario (and begin Thursday morning); freezing rain will be limited to the Northern Lake Erie shoreline (and begin mid Thursday morning); for most other regions, the predominant precipitation will be snow.

Generally, the system will begin for many, in the Afternoon hours, and continue throughout the Evening and Overnight. Lingering light snow is possible for the Friday AM commute contingent alongside further blowing snow.

The evening commute, particularly Western GTA and Southwards along the 401 down to the London region, in addition to the QEW, will be significantly impacted. Conditions will rapidly and exponentially deteriorate through Thursday Mid-Late Evening and Overnight.

Blowing snow will also be of significant concern for many, Thursday into Friday. Due to this weather phenomena being present, it is important to be prepared for brief whiteout conditions, particularly those who will be traveling after sunset on Thursday PM or Pre-Dawn on Friday.

Vorticity, moisture, lift and instability remain very high, thereby allowing this storm to blossom and otherwise overachieve more-so compared to normal.

 

UPDATE 03/01/2018 @ 7:15PM

Snowstorm continues to develop and push towards Southern Ontario as expected.
 
Significant blowing snow with totals reaching what we previously posted prior, is likely.
 
A deformation band from SW of and including London, to Woodstock and NE around the Hamilton area is possible, thereby allowing totals for this swath to be potentially closer to the 20-25cm+ range.
 
There is reasonable certainty along the QEW, either Niagara or somewhere near the region could potentially reach 35-45cm.
 
Watch for significant blowing snow across most of Southern Ontario.
 

The Windsor region will likely overachieve compared to our forecast map above, and as such, that region can expect 15-20cm rather than the 6-12cm originally forecasted.

 

Please stay tuned, as we at TCW are monitoring this situation extremely attentively.

Drive safe and always be alert during wintery conditions. After this recent “warm-up” in prior days, it is crucial to remain extra vigilant for negligent drivers on the road.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather

Newfoundland and Labrador

Snowy and Blizzard Conditions for Parts of Newfoundland


On Monday PM into early Wednesday, a low pressure system will sweep across the Maritimes, strengthen, and target mainly Southern and Central Newfoundland with wind and heavy snow.

As the day progresses on Monday, a strengthening low will provide ample moisture for especially Southern portions of Newfoundland with upwards of 30cm as a possibility.

The heaviest snowfall will occur mostly through the night on Monday, lingering into Tuesday, with slight residual amounts into early Wednesday.

Snow-days for regions such as Burgeo and St. Alban’s are probable on Tuesday and/or Wednesday.

Reduced visibility, alongside rapidly accumulating snowfall will be possible for Southern and Central portions of Newfoundland.

Winds up to 65-75km/h will indeed and further cause travel headaches.

At TransCanada Weather we urge you to monitor the weather closely and be prepared for longer commute times and/or travel delays.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather

Ontario

Snow, Freezing Rain and Thundershowers for Ontario and Quebec

A Low Pressure System from Missouri Targets Ontario and Quebec This Weekend.

A quick moving Low Pressure System from Missouri will track and swing through Ontario and Quebec giving bountiful types of precipitation.

As a result of its fairly quick speed, precipitation amounts will not be overly significant, but, still pose a reasonable inconvenience depending on the region.

The heaviest snowfall will be due East of Lake Superior with moderate accumulations elsewhere across Northern/Northwestern Ontario and much of Quebec.

Parts of Ontario will be inundated with patchy freezing rain, however, significant accretions are not expected at this time.

Southern Ontario, along the 401 corridor and East to the Niagara region, can expect 10-20mm of rain with embedded non-severe thundershowers and gusty winds up to 60-75km/h.

Please adjust your driving accordingly based on the current driving conditions.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather

British Columbia

British Columbia Coastal Snow: Including City of Vancouver



A trough of low pressure is determined to impede coastal regions of British Columbia, including the city of Vancouver and vicinity.

Snow will begin Friday morning and continue through the majority of the day across the aforementioned province. Snow will further linger in the form of flurries through early Saturday morning, bringing in light accumulations to what accumulated as a majority, through the day on Friday.

The city of Vancouver and vicinity will receive accumulating snow and lengthier commutes should be expected.

Regions along the immediate coast will receive the lower-end of the amounts listed in the “legend”, while regions further inland will receive amounts synonymous to the higher-end of the amounts depicted.

Gusty winds across the entire region will be of concern for localized blowing snow.

Be prepared for rapidly accumulating snow and deteriorating conditions across coastal regions and major Metropolitan regions.

 

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather


Ontario

Drenching Rain for Southern Ontario: Localized Flooding

[UPDATED]

A series of moisture-laden impulse waves that will provide a strangle-hold through the Southern and Central USA states will push Northeastwards across Southern Ontario beginning Monday and linger through Wednesday.

Several days of moderate rainfall will tally up the precipitation totals to respectable amounts.

Due to many regions still having a more than measurable snow depth, localized flooding will be a widespread concern.

Is it all bad news? Absolutely not! Warm temperatures will surge through much of the aforementioned regions and potentially ‘tickle’ record-breaking on Tuesday as temperatures surpass the teens.

What’s to come afterwards? Temperatures will cool off, however, there is no significant frigid or arctic air in the forecast until at-least March, and confidence and certainty is somewhat low at this time.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather

New Brunswick

Treacherous Conditions for Quebec and New Brunswick

Respectable ice accretion is expected to build for parts of Quebec and West-Central regions of New Brunswick.

Freezing rain is expected to creep through both of the aforementioned provinces and pose an extended threat of widespread freezing rain. While not all regions are expected to be targeted, regions such as Quebec City and its Northern suburbs, as well as, regions in West-Central New Brunswick will become treacherous as upwards of 15mm of accretion could result. Regions elsewhere will receive minimal accretion, and thereby, only isolated and patchy icy conditions will be present.

Freezing rain is expected to linger into much of the day on Tuesday.

Predominantly rain will target Southern New Brunswick, and Eastern PEI.

At TransCanada Weather, we suggest you take extra care while walking outside or commuting to and from work.

Please adjust your driving habits accordingly and be prepared to allot extra time from traveling to and from your destination.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather

 

Manitoba

Dangerous Windchills for Manitoba and NW Ontario

A brief period of dangerous and life-threatening Windchills are inevitable across Central and Northern Manitoba, as well as, Northwestern Ontario.

A fierce Arctic air-mass will funnel extremely cold air from ‘way-up’ in Northern Canada down to the aforementioned regions.

Parts of Central Manitoba could experience Windchills hovering near -60C. Elsewhere, Windchills in the -50 to -55C range are probable.

It is extremely important residents bundle-up all exposed skin as frostbite can occur in under 2 minutes in these uninhabitable conditions.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather

Ontario

Soaking Rain For Ontario and Quebec

A series of moisture-laden impulse waves that will provide a strangle-hold through the Southern and Central USA states will push Northeastwards across Southern Ontario, Eastern Ontario and Southern Quebec beginning Monday and lingering into Thursday.

Several days of moderate rainfall will tally up the precipitation totals to respectable amounts; ranging from 20-80mm based on the location as depicted on our map.

Due to many regions still having a more than measurable snow depth, localized flooding will be a widespread concern, particularly across ‘Cottage Country’, Eastern Ontario and Southern Quebec.
For regions across Southern Ontario, many regions are still dealing with isolated and ‘patchy’ ice from last weekends ice accretion: watch for localized pooling.

While some models are suggesting 100-125mm is possible over a ~60 hour interval for some regions near Lake Huron and Lake Erie, this is likely a slight over-achievement and we expect the upper threshold of totals to be more in-line with 80mm, with many populated locales receiving 40-65mm.

Is it all bad news? Absolutely not! Warm temperatures will surge through much of the aforementioned regions and potentially ‘tickle’ record-breaking on Tuesday as temperatures surpass the teens.

What’s to come afterwards? Temperatures will cool off, however, there is no significant frigid or arctic air in the forecast until at-least March, and confidence and certainty is somewhat low at this time.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather

 

Alberta

Snowfall For Western Canada This Weekend

 

Snowfall this weekend will target the Interior BC and Southwestern Alberta regions, including major locales of Interior British Columbia.

A wide-swath of 15-30cm is probable, with higher elevations exceeding 30cm.

Plan accordingly and be prepared for snow-covered streets, roads and highways, particularly in Interior BC.

For hourly and live storm updates around the clock, follow us on Twitter.
https://twitter.com/TransCANWeather