Cool Spell Leads Into Seasonable Weekend

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Winnipeg will see seasonably cool conditions over the next couple days, but summer warmth returns for the weekend.

Cooler temperatures are in place for the Red River Valley today as an Arctic air mass pushes in from the northwest. Temperatures will climb to a below-seasonal 23°C in Winnipeg today with northwest winds of 30 gusting 50 km/h. The city will see plenty of sun through the day with just partly cloudy skies across the region. A sprawling high pressure system moving into the province will bring low temperatures near 9°C with light winds.

Much of the Canadian Prairies will experience seasonably cool conditions today.
Much of the Canadian Prairies will experience seasonably cool conditions today with temperatures several degrees below normal.

On Thursday, the high pressure system will continue to slowly push eastwards into the province. The city will see mainly sunny skies with northwesterly winds once again near 30 gusting 50 km/h. Winds will ease in the evening as the high pressure system moves into southern Manitoba. Temperatures will dip to a low near 9°C under clear skies.

On Friday, a light southerly return flow will develop as the high exits the region. This will allow warmer temperatures to build back into the region; Winnipeg will see highs climb back up into the upper 20s, likely around 28°C. The city will continue to see plenty of sun, but a few clouds will likely be in place across the region. Temperatures will head to a low near 16°C on Friday night under partly cloudy skies.

Long Range Outlook

The weekend will bring near-seasonal temperatures to the Red River Valley with variable cloudiness. Early indications are that thunderstorms may be possible across the region Saturday night into Sunday morning.

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

A Bit More Warmth Before Mid-Week Pattern Change

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Winnipeg will see a couple more days with highs in the upper 20s before a significant pattern change mid-week brings seasonably cool temperatures back to the region.

It will be a beautiful holiday Monday in Winnipeg today with plenty of sunshine. Temperatures will climb to a high near 28°C with comfortable humidity levels. Winds will pick up into the 20 to 30 km/h range later this morning. The city will see winds ease this evening as temperatures head to a low near 16°C overnight.

Tuesday will bring more sunshine to the region, but a low pressure system and cold front will approach late in the day. Before it arrives, the city should see plenty of sunshine with temperatures climbing to a high near 29°C. Northwest winds will pick up into the 20 to 30 km/h range in the morning after the warm-sector trough moves through the area. A cold front will slump southwards into the region through the afternoon, bringing mixed skies with scattered showers and risk of a thunderstorm through the evening hours. This system is not expected to produce a severe weather threat. Skies will then clear overnight with winds easing as a ridge of high pressure builds towards the province.

Tuesday will bring one more day of hot weather before a cold front ushes in a seasonably cool air mass from the north.
Tuesday will bring one more day of hot weather before a cold front ushes in a seasonably cool air mass from the north.

Wednesday will bring partly cloudy skies to the region and seasonably cool conditions. Temperatures will climb to only around 22°C with breezy northwest winds of 30 gusting 50 km/h. A light breeze will continue overnight as temperatures dip to a low near 11°C.

Long Range Outlook

There is a strong consensus that the region will continue to see seasonably cool temperatures over the next week or longer. Behind Tuesday’s system, a slow-moving vortex is forecast to develop over Hudson Bay, resulting in a persistent zonal to northwesterly flow aloft over Manitoba.

NAEFS 8-14 Day Temperature Anomaly Forecast — Valid August 12-19, 2019
NAEFS 8-14 Day Temperature Anomaly Forecast — Valid August 12-19, 2019

This upper level wind pattern generally produces near-seasonal temperatures with cool spells. Long-range forecast models are showing daytime highs generally in the 21 to 26°C range right through the weekend with overnight lows in the low to mid teens.

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

Sweltering Summer Heat Ahead

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Winnipeg will see sweltering temperatures this weekend with temperatures set to climb above 30°C for several consecutive days.

A building upper ridge will send temperatures in Winnipeg soaring today. Under mainly sunny skies, the city will see a daytime high near 32°C. A weak ridge of high pressure should keep winds light and the humidity at comfortable levels. Light southerly winds will pick up tonight with a warm low near 20°C.

On Saturday, southerly winds near 20 to 30 km/h will bring a muggier air mass into the region. Temperatures will continue to be hot with a high near 33°C. The morning will be sunny, but partly cloudy skies will likely develop in the afternoon as a weak trough moves through. Temperatures will cool to a low near 19°C on Saturday night with mostly clear skies.

A cold front will push through the region early Sunday morning, bringing with it a chance of showers or thunderstorms. A breezy northwest wind up to 30 gusting 50 km/h will develop through the day, ushering in a slightly drier air mass. Behind the front, skies will clear as temperatures climb to a high near 30°C. Winnipeg will see a low near 15°C on Sunday night under mainly clear skies.

Long Range Outlook

Next week will bring a return of more seasonal temperatures with daytime highs in the mid-20s. Winnipeg will see partly cloudy conditions through the first half of the week with no significant storm threats through the first few days of the week.

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

Summer Heat Continues To Build

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Temperatures in Winnipeg will continue heat up as the city enters into a stretch of hot summer weather.

Winnipeg will see partly cloudy skies through the day today as some remnant cloud from overnight thunderstorms in Saskatchewan graze the area on their way by. There will still be plenty of sun, though, and temperatures will climb to a high near 28°C. Breezy southerly winds picking up to 30 gusting 50 km/h will draw a more humid air mass northwards, making this feel a bit muggy this afternoon.

Heading into the evening, the city will see a slight risk of thunderstorms. Unfortunately, the setup is highly conditional. Whether or not thunderstorms will move eastwards out of southwestern Manitoba into the RRV won’t be clear until much later today. For a comprehensive look at why the setup is so tricky, be sure to check out the ECCC Thunderstorm Outlook on our bulletin viewer.1 As the system responsible for the thunderstorm threat pushes east overnight, skies will clear. The wind will ease tonight with temperatures dipping to a low near 18°C.

Thursday will bring mainly sunny skies to the city as a broad ridge of high pressure moves through. The humidity will ease a bit as temperatures head to a high near 30°C. Winds won’t be much of an issue either, light out of the north or northeast. All in all a beautiful summer day! Temperatures will dip to a low near 17°C on Thursday night under partly cloudy skies. There is a small chance of showers or thunderstorms on Thursday night, but if they form they will likely stay well to the south of the city near the U.S. border.

Temperatures will continue to inch warmer on Friday with a high near 31°C. The city will see a bit more cloud through the day thanks to a stalled frontal boundary draped through the region. Winds will once again be light. Skies should gradually clear on Friday night as the warm front slowly pushes off to the northeast. As it does so, however, it may end up producing a few showers or thunderstorms on its way out of the region. Temperatures will dip to a low near 20°C on Friday night.

Long Range Outlook

The weekend looks hot with humid weather returning, highs in the low 30s, and lows near 20°C. The region will see plenty of sun, but once again there’s a small chance of thunderstorms on Saturday night.

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

  1. An updated Day 1 Thunderstorm Outlook should be available at the latest by 7:30 AM. ↩