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.

Arctic Chill Grips Winnipeg

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Seasonably cold weather will stay entrenched over southern Manitoba for the next few days.

Cold Arctic air will continue to pour southwards across the eastern Prairies this week. The Polar Vortex will sit over Hudson Bay for much of the week, maintaining a strong cross-polar flow. This will keep a steady stream of cold air streaming from the High Arctic down to the eastern Prairies that then curls off to the southeast across the northern United States.

This will keep temperatures cold, but nowhere near record values. Winnipeg will see a high near -17°C today with light winds. Skies will be mainly sunny through the day, but cloud will spread in tonight alongside a weak low moving into the region. Winnipeg will see clouds with flurries through the first half of the night with winds increasing out of the northwest to 30 km/h. Skies will clear out for the second half of the night as temperatures drop to a low near -27°C. Wind chill values will dip into the mid-minus 30s.

GDPS 500mb Wind Speed Forecast valid 21Z Tuesday December 10, 2019
The Polar Vortex will support a cross-polar flow for the next few days, bringing below-seasonal temperatures to the eastern Prairies.

Skies will clear on Tuesday bringing plenty of sun to the city, but it will be downright cold with a daytime high near -20°C. Winds will be light out of the west. Temperatures will drop to a low near -28°C on Tuesday night with light northwest winds. Winnipeg will see sunny skies with a high near -20°C on Wednesday as an Arctic high moves across the region. Winds will be out of the west-southwest near 20 km/h.

Some cloud will push into the region on Wednesday night as more seasonal temperatures begin working into the region. The city should see a low near -25°C.

Long Range Outlook

The second half of the work week will see temperatures returning to seasonal values with plenty of cloud cover. Light snow is possible later Thursday into Friday morning. The weekend should bring mixed skies with highs of -15 to -10°C and overnight lows in the mid-minus teens.

Today’s seasonal daytime high in Winnipeg is -9°C while the seasonal overnight low is -18°C.

Major Pattern Change Sends Arctic Blast Southwards

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Winnipeg will see a major shift in temperatures this weekend that will mark the start of a long stretch of colder weather.

A series of passing lows will keep Winnipeg cloudy heading into the weekend with a couple of chances for flurries. A brisk southerly wind will develop this morning, increasing into the 20 to 30 km/h range. This cool outflow from a departing ridge will keep temperatures slightly cooler again today with a high eventually reaching -6°C. An approaching shortwave will bring a chance of flurries to the region later this afternoon into the evening. Skies will stay cloudy overnight with a chance of flurries as temperatures dip to a low near -10°C. The winds will ease in the evening.

Winds will pick up out of the south again on Saturday as an organized clipper system arrives. The city will see a chance for some light snow as a warm front moves through in the morning. Winds will pick up out of the south into the 30 to 40 km/h range in the morning as temperatures head to a high near -1°C. The wind will ease late in the day.

The major pattern shift begins on Saturday evening as a cold front sweeps southeastwards across the province. It will push through, bringing a bit of light snow and then ushering in northwesterly winds of 30 to 40 km/h. There northwest winds will be pushing in much colder air sourced from a large Arctic high moving into the Prairies. Temperatures will dip to a low near -17°C on Saturday night.

GDPS 2m Temperature Forecast valid 18Z Sunday December 8, 2019
Bitterly cold air will begin building into Manitoba on Sunday as a potent Arctic high pushes into the region.

Temperatures will barely recover on Sunday as skies clear out and winds gradually ease through the day. The Arctic high will push into the southern half of the province on Sunday night, sending temperatures into the low minus 20’s overnight.

Long Range Outlook

Unfortunately, there is little improvement for Winnipeg in the medium-range forecast. Cold weather will continue to persist for several more days.

GDPS 850mb Temperature Anomaly Forecast valid 00Z Tuesday December 10, 2019
The forecast 850mb temperature anomalies show Winnipeg embedded within a large outbreak of below-normal temperatures to start next week.

The city will spend much of the week with daytime highs near -20°C and overnight lows in the mid- to low -20’s. Wind chills will also begin to move into hazardous territory with values in the -30 to -40 range possible during the nights.

Moderation towards seasonal temperatures should occur near the end of the week.

Today’s seasonal daytime high in Winnipeg is -8°C while the seasonal overnight low is -17°C.