Tag: Below-Normal Temperatures

Arctic Outbreak Brings Clouds & Flurries

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An outbreak of Arctic air across the Prairies will bring seasonably cold temperatures and scattered flurries to Winnipeg.

Winter weather has arrived in Winnipeg, courtesy a potent upper low over the eastern Prairies. This low has altered the upper-level air patterns, sending the jet stream diving into the southern United States. This has allowed colder Arctic air to spread southwards through the Prairies and into the northern United States. The result: a prolonged period of seasonably cold weather for Winnipeg.

A potent upper low over Manitoba has pushed the jet stream into the southern United States.
A potent upper low over Manitoba has pushed the jet stream into the southern United States.

Winnipeg won’t be dealing with record-breaking cold by any stretch, but it will be the first sustained period of chillier winter conditions this season. Temperatures will struggle to reach the freezing mark through the first half of the week with highs generally in the -2 to 0°C range. Overnight lows will largely depend on how much cloud lingers through the overnight periods, but will generally sit near -5°C to star the week and fall close to -10°C mid-week.

Winds will start the day out of the west near 20 km/h and gradually ease to light in the afternoon as a weak low moves into the region. Winds will pick up out of the west-northwest on Tuesday into the 20 to 30 km/h range as the low exits the region. The winds should keep up through the night, then ease to around 15 km/h on Wednesday.

The city will see variable cloudiness over the next few days, although generally speaking skies will be mixed to cloudy with a few sunny periods possible here and there. Today, the clouds should thicken up through the afternoon as the low moves into the region. There will be a good chance of flurries with the cloud cover later today, persisting into the night. Temperature profiles through the night may end up supporting light snow that lasts right through the night. Accumulations would still be low, but there could be a greater impact on visibilities and road conditions.

Skies will stay mostly cloudy on Tuesday with a good chance of flurries through the day. The cloud cover will likely begin to break up a bit on Tuesday night. Winnipeg will see mixed skies on Wednesday, clearing later in the day into the overnight period. The clear skies overnight will lead to the cooler low expected mid-week.

Long Range Outlook

The upper low over the region will weaken and shift northeastwards in the second half of the week. A huge swell of warmth won’t return though; most models continue to keep the region in a strong northwest flow.

This likely means a slight warming trend, although below-seasonal temperatures likely persisting right through the weekend into next week. The northwest flow will also likely bring more disturbances through the region, meaning more cloud cover and chances for snow.

Today’s seasonal daytime high in Winnipeg is 6°C while the seasonal overnight low is -4°C.

Two Days Of Seasonal Weather, Then A Prolonged Cold Snap

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Winnipeg will see breezy conditions with seasonably mild temperatures today, but a cold front passing through on Saturday will usher in an extended period of markedly cooler weather.

A low pressure system crossing the Prairies will finally bring seasonal temperatures back to southern Manitoba today. With a brisk southerly wind increasing to 30 gusting 50 km/h, temperatures will climb to a high near 11°C. Morning sunshine will give way to mixed skies, but things should stay dry with no precipitation in the forecast. The low will continue to advance towards the province tonight, keeping skies mixed and maintaining the southerly winds. Winnipeg should see a low near 7°C.

The city will still see seasonal temperatures on Saturday, but the day will be much less pleasant as a cold front sweeps through early in the morning. Temperatures will hover near the overnight low of 7°C then begin cooling later in the day. Winds will be breezy out of the west-northwest near 30 gusting 50 km/h and skies will be mostly cloudy. Again, no precipitation is forecast. Skies will stay cloudy on Saturday night with a northwest wind near 20 km/h and a low of -1°C.

RDPS 2m Temperature Forecast valid 21Z Friday October 25, 2019
An approaching low will bring seasonably mild temperatures to Winnipeg today, but a prolonged stretch of cooler conditions will quickly move in behind it.

Sunday will bring cloudy conditions to the city with temperatures remaining steady near 0°C. This will mark the beginning of a prolonged cold snap that will entrench the city in below-normal temperatures for the next week. The northwest winds will gradually ease through the day and into the evening. Some flurries will be possible in the city as the cold air and northwest wind will bring a chance of lake-effect snow off of Lake Manitoba. Temperatures will head to a low near -4°C on Sunday night with mostly cloudy skies.

Long Range Outlook

Unfortunately, a long stretch of cold weather is on the way for Winnipeg. Arctic air will plunge southwards through much of North America through the week as a significant upper-level trough develops.

GDPS 850mb Temperature Anomaly Forecast valid 00Z Tuesday October 29, 2019
Temperatures will stay well below-seasonal next week for much of the western portions of Canada and the United States.

The result will be a week of variable cloudiness, temperatures struggling to reach 0°C, and several chances of accumulating snow.

Today’s seasonal daytime high in Winnipeg is 7°C while the seasonal overnight low is -3°C.

Cool, Wet Weather As Fall-Like Conditions Arrive

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A passing low pressure system will bring wet, cool, and windy conditions to the Red River Valley to start the week.

Today will be another unsettled day across southern Manitoba, but Winnipeg might just miss out on most of the activity. Skies will stay mostly cloudy through the day and temperatures will be seasonably cool with a high near 20°C. A low pressure centre moving from the Interlake into northwestern Ontario will bring light winds in the morning that strengthen out of the northwest into the 30 gusting 50 km/h range for the afternoon. The region will be mostly dry to start the day, but through the afternoon widespread showers and thunderstorms will develop. The precipitation will track from northwest to southeast and has the potential to impact most of the Red River Valley. That said, Winnipeg may stay dry and sit between bands of showers to the southwest and the northeast.

Temperatures will dip to a low near 14°C tonight with mostly cloudy skies and a chance of showers. Winds will persist out of the northwest near 20 km/h.

Tuesday will be a bit of a shock to the system as the first blast of fall-like conditions moves into the region. A trough of low pressure will keep it cloudy and likely bring periods of rain to the city. The northwesterly wind will strengthen as high as 40 gusting 60 km/h and usher in a significantly cooler air mass. As a result, the temperature will slide from near 14°C in the morning to 11 or 12°C in the afternoon. The wind will continue around 30 gusting 50 km/h on Tuesday night as temperatures drop stay steady around 11 or 12°C.

Much of Mantioba will see showers or thunderstorms through the first half of this week.
Much of Mantioba will see showers or thunderstorms through the first half of this week.

Wednesday will finally bring clearing skies and sunshine back to the region. Winds will continue out of the northwest near 30 gusting 50 km/h right through the day, but temperatures will rebound back to a high near 19°C. The wind will finally ease on Wednesday evening with temperatures heading to a low near 13°C under mixed skies.

Long Range Outlook

The remainder of the week should bring more settled conditions with plenty of sunshine and no significant precipitation expected. Temperatures should gradually return to near-seasonal values.

Today’s seasonal daytime high in Winnipeg is 23°C while the seasonal overnight low is 10°C.

A Couple Nice Days Before Fall-Like Conditions Mid-Week

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A persistent northwesterly flow aloft will gradually spread below-seasonal temperatures across Manitoba through the first half of the work week.

Southern Manitoba will see a shift into markedly cooler temperatures mid-week as a persistent northwesterly flow draws cooler air from the Arctic southwards. To start the work week, Winnipeg will see plenty of sunshine today with just a few clouds this afternoon. Winds will pick up out of the west to around 20 km/h midday as temperatures climb to a high near 24°C. Winds will ease this evening with temperatures falling to a low near 13°C under clear skies.

Tuesday will bring a bit more cloud to the region as a weak disturbance pushes towards the province from the west. Skies will become mixed in the afternoon with winds strengthening out of the west-northwest to 20 to 30 km/h. Winnipeg will see a seasonal high near 25°C. There’s slight chance of a rain shower in the evening as the disturbance moves through the region. Skies will become cloudy Tuesday night as temperatures head to a low near 12°C.

Significantly below-seasonal temperatures will be in place over southern Manitoba on Wednesday

Decidedly fall-like weather will move into the region on Wednesday. With northwesterly winds increasing to near 30 km/h, Winnipeg will climb to a well below-seasonal high near 18°C. Skies will remain mostly cloudy with a chance of showers through much of the day. The winds will taper off in the evening, but skies will remain fairly cloudy for much of the night. Winnipeg will see a low near 10°C on Wednesday night.

Long Range Outlook

The remainder of the week will bring a return to near-seasonal temperatures with daytime highs rebounding into the mid-twenties. The Red River Valley will see plenty of sunshine with generally dry conditions persisting into the weekend.

Winnipeg’s seasonal daytime high is currently 26°C while the seasonal overnight low is 13°C.