Tag: Alberta

Alberta

Severe Weather Envelopes the Southwestern Prairies Thursday; Reloads Friday

A potent upper-air pattern will create extreme instability across the Southwestern Prairies Thursday. A surface trough will slice through the summer air offering a trigger for explosive thunderstorm development in the unstable atmosphere.

Winds at the surface out of the southeast and upper-level winds from the southwest suggest a well-sheared warm sector. The strongest surface heating will remain just south of the border. In spite of that, ample moisture delivery, temperatures falling aloft, effective shear, and plenty of energy will provide a breeding grounding for severe thunderstorms Thursday.

Thunderstorms will develop across Southern Alberta and Northern Montana around 2 pm. Trans-versing northeastwards throughout the afternoon and evening, Initial storm develop may feature discrete cells and bowing segments; a threat for large hail, damaging winds, and an isolated tornado is possible. As progression into the evening continues, a powerful nocturnal complex of thunderstorms known as a Mesoscale Convective Complex (MCS), may develop. These convective weather systems are notorious producers of damaging winds, intense frequent lightning, large hail, and localized flooding in torrential downpours. Moreover, these systems are known to persist well into the pre-dawn hours.

click to navigate forecast map.

HAZARDS: 90-110km/h wind gusts, 2-5cm hail, torrential rainfall, frequent lightning, and an isolated tornado.

We will be monitoring the thunderstorms throughout Saskatchewan and Alberta attentively on Thursday. Be sure to closely monitor watches and warnings throughout the afternoon, evening and overnight. We will be issuing another forecast for severe thunderstorm risk in Saskatchewan, Friday. The risk depends greatly on the evolution of thunderstorms Thursday into pre-dawn Friday.

HEAVY RAINFALL CONTINUES WEST OF EDMONTON

Much of the focus is rightfully centered around substantial thunderstorm risk further south, but appreciable rainfall amounts along the Highway 16 & 40 corridor is worth mentioning. This region has already seen very-heavy rainfall over the last several days. Another 50-75mm is on tap between Hinton and Edmonton, through Friday.

Alberta

Much NEEDED RAINFALL & SNOW to Kick off the…

A potent upper-level system will stall all week across Alberta and Saskatchewan. The unsettled pattern will bring much-needed rainfall, thunderstorms, much below seasonal temperatures, and even accumulating S*** for Banff & Jasper.

Beneficial rainfall will persist all week in Alberta & Saskatchewan as an upper-level system stalls across the region. The heaviest rainfall is anticipated across Central Alberta where 50-75mm+ is expected by Friday. With much of that rain falling between Wednesday and Thursday. Some rainfall is in the forecast for drought-stricken High Level (Northern Alberta) & Moose Jaw (Southwestern Saskatchewan).

The much below seasonal temperatures and a soaking rainfall will make it feel more like the middle of October across the foothills. By Wednesday, temperatures will plummet nearly 10c below seasonal. Continuing through the day Thursday.

DAYS OF THUNDERSTORMS CONTINUE WITH THE THREAT OF SEVERE TUESDAY

Thunderstorms have been an almost daily occurrence over the last several days in the Prairies. The thunderstorm risk is expected to continue this week.

Monday: thunderstorms producing heavy downpours and small hail across Interior British Columbia and Northern Alberta.

Locally strong to severe thunderstorms expected across the yellow shaded area today.

Tuesday: better dynamics for potent thunderstorms across Southern Alberta (Calgary to Medicine Hat). Discrete cells or supercells could be capable of producing damaging winds and large hail.

Wednesday: daytime heating thunderstorm risk moves further East into Saskatchewan.

ACCUMULATING SNOW KICKS OFF SUMMER IN BANFF & JASPER

Between Wednesday night through Friday, accumulating up-sloping snow is expected over the high-elevation topography of Banff and Jasper National Parks. Believe or not, Friday is officially the first day of summer.

Alberta

Major Snowstorm Slices Through British Columbia & the Prairies

A Major Pattern reversal is underway across Western Canada. Cold air will descend from Northern Canada beginning Friday, coinciding with an extended period of heavy snowfall.

Our forecasting team will be closely monitoring the progression a major winter storm beginning Thursday evening. The Winter Storm isn’t expected to bring heavy snowfall rates, but rather an extended period of light-moderate snow over the next 48 hours.

The heaviest snowfall totals are expected through the Rockies; across British Columbia and Alberta. Where in excess of 50cm of snow is expected to fall. Even major cities, such as Edmonton won’t escape the wintry weather. With 30 or more centimeters projected to fall, over the next couple days.

Projected Snowfall Totals through Saturday PM
**Click map to make it zoomable.
Alberta

[UPDATED] Prairies: Not Your Usual Clipper System This Weekend

Alberta Clippers are synonymous for bringing snowfall lee of the Canadian Rockies, during December and January. These typically moisture-starved systems are fast movers, ejecting quickly out of Alberta, through the Southern Prairies – towards the Great Lakes. Read more about Alberta Clippers here.

A clipper is expected to form in Northern Alberta Saturday evening. Normally, these systems are more of a nuisance, accompanied by low snowfall totals and quick forward motion. On the contrary, this weekends system will flourish. Thanks to clashing temperatures and abundant Pacific moisture.

SNOWFALL TOTALS

Accumulations will vary greatly throughout the Prairies, bearing in mind the heaviest snow will fall along a narrow swath. Current guidance suggests close to 15cm across the northern extent of the darker shaded region (in our forecast map). Including, Northern & Central Alberta. The heaviest snow (~20cm) will fall across Extreme Southwest Manitoba and Southeast Saskatchewan. *Model guidance has increased snowfall totals further into Southwestern Manitoba, where Environment Canada has issued snowfall warnings. Several warnings now stretch across parts of Prairies.

There will be another swath of snow tracking down the Rockies, bringing 10-20cm. It looks like Calgary will be limited to less than 5cm through Friday. By Saturday, a steep contrast in temperature envelopes the Prairies. Calgary will see a high of 9c and sunshine. Whereas, Eastern Saskatchewan will still be below freezing.

Projected snowfall totals through this weekend.

STRONG WINDS & BLOWING SNOW

Winds pickup between the Grande Prairie – Whitecourt corridor early Saturday evening. Winds sustained at or over 30km/h, gusting 60-80km/h. Gusty winds will overspread much of Alberta and Southern Saskatchewan overnight Saturday into Sunday morning. The strongest wind gusts aren’t expected to coincide with the heaviest swath of snow. Still, freshly fallen snowfall, which is dry and light – will combine with gusty winds. Bringing local blowing and drifting snow. Stay tuned to weather advisories, or statements pertaining to any potential road closures.

Alberta

Snowflakes Fly in Alberta Wednesday Morning



Environment Canada issues Snowfall Warnings and Special Weather Statements across Central Alberta Wednesday. 

A cold front decended on the province Tuesday into Wednesday morning, sending temperatures near or below the freezing mark.


An area stretching from Slave Lake to Jasper included in Environment Canada’s snowfall warning, which may see 10-15cm of snow. 

Edmonton was awaken to temperatures near the freezing mark. Barrhead saw temperatures drop below-zero with accumulating snow.

 Several wet centimetres can be expected across the region, draped in Special Weather Statements.

https://twitter.com/_shewanders/status/1039881424558481408?s=21
As you can see clearly, there are mixed feelings about the early snowfall shared by this social media user.

Edmonton will not escape the early taste of winter, with a couple wet centimetres possible. Even Calgary, could experience a few wet flakes Wednesday.   



Alberta

[UPDATED] Severe Thunderstorms Possible in the Prairies

Isolated severe thunderstorms are possible today (Monday June 25th, 2018) and tomorrow (Tuesday June 26th, 2018) in the Prairies.

MONDAY:
A cold front will act as a trigger for severe thunderstorms today in Alberta.

The greatest risk for severe will center itself north of highway 43 and along and west of highway 63. Much of the severe activity looks to be staying south of Fort McMurray.

Environment Canada (PASPC) has placed this region in a “severe” risk on their map. Highlighting the risk for 3-6cm hail. Other threats include damaging winds in excess of 90km/h, and frequent lightning.

Environment Canada forecast map for today – highlighting the severe risk in Alberta. Please note: these maps are still in the experimental stage and are not currently operational.

TUESDAY:
A disturbance and associated cold front will move Eastwards out of Alberta tonight into Saskatchewan. The disturbance is expected to deepen as it centres itself over Central Saskatchewan Tuesday Afternoon.

The cold front will act as a trigger for thunderstorms in Eastern Saskatchewan and Southwestern Manitoba between 2pm and 8pm – West to East.

Some of these storms could turn severe with frequent lightning, large hail, torrential rainfall and strong winds.

Environment Canadas Convective Discussion for Tuesday, June 26th.

Alberta

Beautiful Weather Arrives in Alberta and British Columbia

Temperatures soar above freezing today in the Rockies and Foothills – including Banff, Jasper and Calgary. Double-digit highs for Lower Mainland and Southern Interior British Columbia today and Tuesday. Dense fog this morning in Southeast Alberta degrades to abundant sunshine.

A broad area of high pressure combined with plentiful sunshine, and light changeable winds, will send temperatures soaring above freezing today and Tuesday across Southern British Columbia and Southern Alberta.

Overnight-lows in Calgary, Red Deer, Airdrie, Lethbridge, Medicine Hat – and much of Southern Alberta were close to or below negative 10c. The same locales today will be in the upper single digits. The warm above seasonal weather will persist into Tuesday. Temperatures will (once again) fall well below freezing tonight, quickly rising into the upper single digits Tuesday Afternoon. Pleasant temperatures are expected to persist for much of the week.

Much of the same conditions is expected for Southern British Columbia. Locales in the Lower Mainland – including Abbotsford can expect highs in the teens today.

Forecast daytime-high temperatures Monday, March 12, 2018. Zoom-in on mobile to navigate to your location. Courtesy of darksky.net

Forecast daytime-high temperatures Tuesday, March 13, 2018. Zoom-in on mobile to navigate to your location. Courtesy of darksky.net

It will be an excellent day to get outside and enjoy some needed sunshine. If you like this story, share the ‘warm weather’ with your friends and family!

For hourly and live storm updates around the clock, follow us on Twitter @TransCANWeather.

– TCW