A Break From The Deep Freeze

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A stretch of mild weather will develop in Winnipeg this week with temperatures even climbing back towards 0°C on the weekend.

Today will mark the start of a large-scale pattern change that will cut off the supply of Arctic air to the Prairies. A westerly to southwesterly flow aloft will develop through the rest of the week, pushing warmer Pacific air gradually eastwards. Before the city sees the warmer temperatures, though, the colder air needs to vacate. Today will be the day for that; it will be a rather typical “transition day” for Winnipeg.

Moderate southerly winds of 30 to 40 km/h will persist through the day under mostly cloudy skies. There will be a slight chance of flurries this morning, but snow will likely stay mainly north of the city. Temperatures will climb to a high near -13°C.

Temperatures in Winnipeg will head to a low near -15°C tonight with diminishing winds under partly cloudy skies.

RDPS 10m Wind Forecast valid 18Z Wednesday December 18, 2019
Moderate southerly winds will be in place over south-central Manitoba on Wednesday.

Thursday will bring mostly cloudy skies to the city again with a high near -10°C. Winds will be light out of the north-northeast. Temperatures will dip to a low near -13°C on Thursday night under cloudy skies with a chance of flurries.

A warm front will approach the province on Friday, keeping things cloudy with a chance for some light snow. Temperatures will continue to warm with a high near -8°C in Winnipeg. The winds will stay light, but shift to southerly.

The warm front and its parent low will push across the province on Friday night into Saturday. This will bring southerly winds of 20 to 30 km/h to Winnipeg for the night with a low near -12°C.

Long Range Outlook

Pacific air will wash over southern Manitoba on Saturday, bringing seasonably mild warmth to the region. Temperatures will climb to around 0°C this weekend with overnight lows in the -5 to -10°C range. Plenty of cloud will stick around, but by the weekend some sunny breaks look likely as well. Temperatures will cool slightly to start the new work week with daytime highs dropping into the -5 to -10°C range with overnight lows dipping into the minus teens.

Today’s seasonal daytime high in Winnipeg is -11°C while the seasonal overnight low is -21°C.

Temperature Roller Coaster Ahead for Winnipeg

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Winnipeg will see temperatures vary significantly over the next few days as Pacific lows and Arctic highs quickly move through.

The first of 3 weather systems set to impact the region in as many days is on the way. A low pressure system will move across the province today, spread warmer air across southern Manitoba. Temperatures in Winnipeg will climb to a high near -10°C with southerly winds near 20 km/h shifting to westerly late in the day. Skies will start off clear, but cloud cover will work into the region this afternoon and bring a chance of flurries with it.

Skies will clear tonight as a cold front pushes through the region. Temperatures will dip to a low near -26°C.

The second system to impact the region – an Arctic high – will move through the province on Tuesday. It will bring mainly sunny skies to Winnipeg but temperatures will be cold with a high of just -22°C. Some cloud cover will begin working in from the west on Tuesday night, but not before temperatures dip to a low near -27°C.

RDPS 2m Temperature Forecast valid 09Z Tuesday December 17, 2019
An Arctic high will move through northern Saskatchewan Monday night and into Manitoba on Tuesday. It will bring seasonably cold conditions to the region.

On Wednesday, the third system of the week will move into the province. A low pressure system will approach from the northwest, drawing another push of milder Pacific air eastwards. In Winnipeg, skies will stay mostly cloudy with moderate southeasterly winds near 30 gusting 50 km/h. There will be a chance of flurries, but the dry southerly winds will limit the potential. With warmer air pushing in, Winnipeg will see a high near -15°C late in the day. Winds will ease on Wednesday night with temperatures remaining steady near -15°C.

Long Range Outlook

The rest of the week looks seasonably mild with daytime highs climbing into the -7 to -10°C range and overnight lows in the warmer half of the minus teens. Cloud looks to be plentiful, though, and there will be the occasional chance of flurries. No significant snowfall is in the forecast.

Today’s seasonal daytime high in Winnipeg is -10°C while the seasonal overnight low is -20°C.

Friday Snow Gives Way to Cold Weekend

Brad

An inverted trough bringing snow to Winnipeg today will usher colder weather back into the region for the weekend.

An inverted trough crossing the province this morning will continue to bring snow to Winnipeg. Accumulating snow will continue through the morning then taper off through the afternoon. Much of the region will see 5 to 10 cm of fairly fluffy snow. Brisk northerly winds near 30 gusting 50 km/h will develop in the afternoon which will usher in cooler temperatures ahead of an approaching Arctic high. The combination of new fluffy snow, some lingering flurries, and moderate winds will likely produce areas of blowing snow in rural areas. Skies will clear overnight with winds of 20 to 30 km/h and temperatures dipping to a low near -25°C. Wind chill values are forecast to dip into the -35 to -40 range.

RDPS 24 hr. Snow Accumulation Forecast (Kuchera Ratio) valid 00Z Saturday December 14, 2019
Much of southern Manitoba will see 5 to 10 cm of snow today; amounts will be closer to 5 cm along the U.S. border and increase to almost 10 cm across WestMan and the Interlake.

An Arctic high moving into the province on Saturday will bring sunny skies and cold temperatures. The wind will taper off through the morning and temperatures will climb to a high around -20°C. Skies will stay clear with light winds on Saturday night as temperatures dip to a low near -28°C.

Winnipeg will see some cloudy periods on Sunday as the Arctic high exits the region and cloud and warmer air begins pushing in from the west. Winds will gradually pick up out of the south to around 20 km/h by the end of the day. This cool southerly outflow from the high will keep temperatures cooler again with a high only around -17°C. A few flurries are possible through the day with mixed skies and a low near -22°C.

Long Range Outlook

Next week looks to bring variable temperatures with highs generally in the -10 to -20°C range with overnight lows in the low to mid-minus 20s. No significant snowfall is in the forecast and the city will likely see a fair amount of sunshine.

Today’s seasonal daytime high in Winnipeg is -10°C while the seasonal overnight low is -19°C.

End-of-Week Snow Brings Seasonal Temperatures Back

Brad

Temperatures in Winnipeg will slowly climb through the rest of the work week, finally reaching seasonal values on Friday when a passing low pressure system spreads snow through the region.

The cold weather will still be in full force today as an Arctic ridge moves across the region. Temperatures will climb to only -18°C in Winnipeg today, but fortunately the wind will be light. The warmer air will begin it’s gradual shift eastwards later in the day, spreading some cloud into the region for tonight. Temperatures will dip to a low near -24°C with light winds.

Thursday will bring partly cloudy skies to the city as the Arctic ridge slowly weakens. Temperatures will climb slightly with Winnipeg’s high expected to reach around -15°C with light east winds. More cloud will push into the region on Thursday evening with light snow likely beginning sometime after midnight. Temperatures will gradually rise to around -12°C by Friday morning.

NAM 24hr. Snow Accumulation Forecast valid 00Z Saturday December 14, 2019
Accumulating snow will move through southern Manitoba on Thursday night through Friday morning.

Light snow will continue on Friday morning across the Red River Valley. Winnipeg and the Red River Valley will receive 5 to 10 cm of fluffy snow before it tapers off. The low pressure system responsible for the snow will push off to the east for Friday afternoon, leaving the region with a few flurries and strengthening northerly winds. By mid-afternoon, winds will pick up to 30 gusting 50 km/h as temperatures drop into the mid-minus teens. A chance for flurries will continue into the evening hours, but some clearing will move in overnight as temperatures dip to a low near -24°C.

Long Range Outlook

Another Arctic high will move through the region this weekend, bringing more cold weather. Winnipeg will see daytime highs near -20°C with overnight lows in the -20 to 25°C range. The region should see plenty of sunshine.

Today’s seasonal daytime high in Winnipeg is -9°C while the seasonal overnight low is -19°C.