Tag: Blowing Snow

Mild Tuesday Snow Gives Way to Cold, Wind, and Blowing Snow

Brad Leave a comment

A low pressure system moving through southern Manitoba will bring snow and mild temperatures to the Red River Valley. In its wake, colder temperatures and strong winds will surge into the region.

RDPS 10m Wind Forecast valid 15Z Wednesday December 4, 2024
Strong winds will develop across the Red River Valley late Tuesday into Wednesday, likely producing widespread blowing snow across the region.

Apologies for the late forecast, life has been busy!

Snow spread across much of southern Manitoba this morning as a low pressure system pushed a warm front into the region. A burst of moderate to heavy snow has moved through the region this morning, and now milder temperatures will spread across the region with daytime highs of -5 to 0 °C across southern Manitoba. As the warm air moves in, stiff southerly winds will shift to lighter westerlies.

A cold front will sweep through later today, ushering in some light snow and a major shift in the weather. Temperatures will plummet into the minus teens tonight as northwesterly winds strengthen into the 40 to 50 km/h range with gusts of 60 to 80 km/h. It’s likely that lake-effect snow will develop off the lee of Lake Manitoba and Lake Winnipeg, producing a band of flurries that could last well into Wednesday.

The colder temperatures, new snow, and strong winds will likely produce widespread blowing snow across the region, though limited snowpack inside of Winnipeg could reduce the overall amount of blowing snow within city limits. Of particular concern will be the Trans-Canada Highway corridor between Winnipeg and Portage la Prairie where strong winds, existing snow, and lake-effect snow could combine to produce white out conditions and potential highway closures heading through Wednesday.

With those strong northwest winds, temperatures will only recover a couple degrees on Wednesday before dropping down to a low in the -20 to -25 °C range on Wednesday night. Wind chilled values will likely hover in the -25 to -30 range all day then closer to -30 overnight as the wind dies off.

A ridge of high pressure over the province on Thursday should bring partly cloudy skies to the region, light winds, and highs in the mid-minus teens.

Long Range Outlook

Another notable pattern shift will occur late this week as a strong low pressure system is forecast to track across the southern Arctic. This system will send warmer air sweeping across the Prairies, sending daytime highs back towards the 0 °C mark on the Weekend. More snow looks possible eon Sunday as a cold front pushes through the region, then it looks like a return to near-seasonal conditions for much of next week.

Today’s seasonal daytime high in Winnipeg is -7 °C while the seasonal overnight low is -16 °C.

Temperatures Return to Seasonal Values in Winnipeg

Brad Leave a comment

The recent cold snap is coming to an end as temperatures moderate back towards seasonal values, but with that will come plenty of cloud.

RDPS 10m Wind Forecast valid 00Z Sunday January 21, 2023
Moderate southerly return flow winds will develop over the Red River Valley on Saturday.

Heading into the end of the week, the last remnants of the Polar Vortex that have been lingering over Manitoba will finally shuffle off to the east. This will ease the cold over the region and allow temperatures to recover towards seasonal values. As the weekend progresses, a warm front will push off the Alberta Foothills into southern Saskatchewan while the Arctic front re-strengthens in the north and drops into the northern Prairies.

In Winnipeg, Friday will bring conditions on the cloudier side with a high in the mid-teens today. Like the past couple days, there’s a chance the cloud could be accompanied by light snow. The last of the cold air from the Polar Vortex will linger over the province tonight and keep overnight lows down tonight. The cloud cover will likely break up overnight and allow temperatures to dip into the -30 to -25 °C range.

More cloud will push into the region on Saturday as the warm front creeps across southern Saskatchewan. The return flow from a departing high will intensify over the Red River Valley, strengthening southerly winds up to the 40 to 50 km/h range through the day. Highs will climb back to around -15 °C, but wind chill values will be notable making it feel closer to -25. In addition to the chill, those southerly winds will likely produce areas of blowing snow through the Red River Valley; any blowing snow would likely be at its worst from the early afternoon to the evening.

Those winds will begin to ease on Saturday evening as the warmer air finally reaches the valley. Light snow will likely move through overnight with temperatures staying steady in the mid-minus teens.

Winds will continue to ease on Sunday with cloudy conditions across the Red River Valley. Highs will creep upwards again, likely reaching around -10 °C in Winnipeg and area. More light snow is possible on Sunday night with temperatures dipping back towards -15 °C.

Long Range Outlook

There is disagreement between weather models on how next week will turn out. Canadian weather models are pushing Arctic air further south and giving Winnipeg highs in the -15 to -5 °C range through the first half of the week, while other models bring highs of -10 to 0 °C into the region next week.

Either way, plenty of cloud cover will come along with that milder pattern. The warmer weather will likely stick around to the end of the week.

Today’s seasonal daytime high in Winnipeg is -13 °C while the seasonal overnight low is -24 °C.

Spring Storm to be Followed by Much Warmer Weather

Brad 2 Comments

A Colorado Low is on the way to Southern Manitoba and will bring snow and blowing snow to the region beginning Tuesday night. This storm will exit the region on Thursday, and after a couple cool days much warmer spring weather will move into the province.

Weather alert map valid 0827Z Tuesday April 4, 2023
Winter storm warnings are out across southern Manitoba (red on the Canadian side of the border) with blizzard warnings across much of the Northern Plains of the United States (red south of the international border) for a potent spring storm moving into the region. Image valid at 8:30 AM Tuesday March 4, 2023.

A Colorado Low is organizing south of the border that will bring a blast of winter weather to parts of southern Manitoba. It has already begun to spread a band of snow through South Dakota that will lift north-northeast through the day today.

In Southern Manitoba, the snow will approach the southern border by evening, then spread into the province overnight. Light snow will fall across southwest Manitoba, with heavier snow pushing into the Red River Valley and southeastern corner of the province. The Trans-Canada Highway corridor in the RRV will likely receive 5–10 cm of snow by Wednesday morning with higher amounts of 10–20 cm to the south and southeast.

Snow will continue across the Red River Valley and east on Wednesday with another 5 to 10 cm likely in most regions. The snow will finally begin to taper off on Wednesday night. By the time all is said and done, much of southern Manitoba will receive 15 to 25 cm of snow; amounts will drop off quickly west and north of a line running roughly from Pilot Mound to Berens River. The heaviest amounts could reach into the 30 to 40 cm range with the highest risk for that much snow focused in two locations: Sprague and the southwest Red River Valley, particularly in the areas closer to the western escarpment.

RDPS Total Accumulated Snowfall Forecast (10:1 SLR) valid 12Z Thursday April 6, 2023
Much of southern Manitoba will see notable snowfall accumulation as the region is clipped by a Colorado Low Tuesday night through Wednesday.

In addition to the snow, moderate northwesterly winds will develop on Wednesday, bringing areas of blowing snow to the Red River Valley. In combination with the moderate falling snow, expect poor travel conditions across the region, including southward into the United States, Tuesday night through Thursday.

Please refer to the Meteorological Service of Canada for the latest weather alerts for Manitoba.

Temperatures will run seasonably cool through the storm with highs in the -5 to 0 °C range over the next few days. Lows will generally sit in the -5 to -10 °C range, except for Thursday night where clear skies will combine with the fresh snow to send lows into the mid-minus teens.

Long Range Outlook

Probably just as notable as all the snow coming over the next couple days will be the forecast for the weekend. As the Colorado Low pushes northwards, it will dislodge the Polar Vortex and send it further north, finally loosening its influence over the eastern Prairies. A more zonal flow aloft will develop over the region, and much warmer Pacific air will begin to sweep across the Prairies this weekend.

The extensive snow pack over the region will limit daytime highs into the low to mid-single digits. If the ground were completely bare and skies were sunny, daytime highs in the mid-teens could be possible Sunday into Monday; alas. But in addition to temperatures climbing above freezing, this push of warm air will also likely send dew point values above 0 °C as well.

Dew point values rising above freezing greatly enhance how quickly snow can melt, and although the warmer weather will be welcome, it may result in a lot of melting from Saturday through Wednesday. Given the pre-existing concern in Manitoba’s flood forecast, this could result in a higher flood risk for some areas. Be sure to watch for updated Manitoba Flood Forecasts and Reports if you are concerned that you may be impacted by a quick melt.

Today’s seasonal daytime high in Winnipeg is 7 °C while the seasonal overnight low is -4 °C.

Breezy With Light Snow Today, but Spring Weather Returns Soon

Brad Leave a comment

It will be a bit of an unpleasant day in Winnipeg today as breezy northerly winds combine with light snow and cooler temperatures. Nicer weather is on the way soon, though, with plenty of sun and warming temperatures through the weekend.

RDPS 10m Wind Forecast valid 21Z Friday March 17, 2023
Moderate northerly winds will develop over the Red River Valley for Friday afternoon.

Winnipeg will find itself on the back side of a rather potent low pressure system moving from the United States into Ontario today. The region will see breezy northerly winds up to 40 gusting 60 km/h today, driven by the passing low and the approach of an Arctic high from the northwest. Along with that, a weak inverted trough slumping southwards will bring some light snow to the region. These two things will combine to produce some blowing snow in the region, but will mainly be limited to outlying areas and southwards through the Red River Valley. Temperatures will struggle to reach even -10 °C today, and head back into the mid-minus teens overnight. The wind will be stronger this afternoon, then ease overnight.

Skies will clear for Saturday, leaving behind sunny skies for the weekend. Temperatures will climb into the -5 to -10 °C range on Saturday and then into -5 to 0 °C range on Sunday. Overnight lows will sit in the -10 to -15 °C range. Of note, though, is that with full sunshine in mid-March, areas that aren’t just barren snow-covered fields will definitely see temperatures higher than this. It won’t be surprising for many parts of the city to see temperatures in the -5 to 0 °C range this weekend and to see plenty of melting despite the sub-freezing air temperatures.

Long Range Outlook

The start of next week will cool just a bit, then warm up again heading into mid-week. Some snow is possible on Wednesday as a disturbance moves through the region, but it will also likely bring a shift to daytime highs around freezing.

With no major snowfalls on the horizon and several days of sunshine ahead, it will continue to gradually feel more spring-like in Winnipeg; enjoy the pleasant weather this weekend!

Today’s seasonal daytime high in Winnipeg is +0 °C while the seasonal overnight low is -11 °C.