Unsettled Weather Arrives For The Weekend

A slow-moving disturbance will bring unsettled conditions to the Red River Valley this weekend.

Winnipeg will see a beautiful end to the work week today as temperatures return to the upper 20s with plenty of sunshine. That warmth will come with breezy conditions as southerly winds strengthen to 30 gusting 50 km/h this morning. The city should see partly cloudy skies for much of the day, but cloud cover will thicken up in the evening.

It will be a warm night tonight with temperatures only dropping to around 19°C under cloudy skies. The southerly winds will continue right through the night.

Showers and/or thunderstorms will develop over western Manitoba overnight and slowly push northeast. This activity will likely stay west and north of Winnipeg, but there’s a chance that passing showers may graze Winnipeg on Saturday morning.

Through the rest of Saturday, the city will see cloudy skies with winds continuing to strengthen to 40 gusting 60 km/h out of the south. Showers and/or thunderstorms are likely through the day to the west and north of the city, but they will slowly push eastwards through the day. Despite the cloud, it will still be fairly warm with a high near 25°C.

Moderate southerly winds will be in place over southern Manitoba on Saturday.
Moderate southerly winds will be in place over southern Manitoba on Saturday.

The wind will continue through Saturday night in the 30 to 40 km/h range. Skies will stay cloudy through the night with temperatures dropping to a low near 17°C.

Showers will slowly move eastwards into the region overnight with what looks like a good chance of some rain before the sun rises on Sunday. There will be a risk of a thunderstorm with the showers pushing eastwards overnight.

Winnipeg will see unsettled conditions with showers likely on Sunday and a risk of a thunderstorm. The wind will continue out of the south near 30 gusting 50 km/h, but temperatures will be cooler with a high near 22°C. The entire region will see a good chance of showers with the risk of a thunderstorm right through the day. More showers with the risk of a thunderstorm will be possible Sunday night. Temperatures will dip to a low near 16°C with winds easing through the night.


It’s important to note that weekend’s system is moving slowly, and will have the potential of producing very slow-moving lines of thunderstorms as it trudges eastwards. The slow progression of these storms means they will be capable of producing significant rainfall accumulations with a risk of flash flooding. Be sure to stay aware of ECCC’s daily thunderstorm outlook available on our bulletin viewer and for any watches or warnings issued through the weekend.


Long Range Outlook

The unsettled conditions will likely stay for Monday before gradual clearing begins working into the region on Tuesday. As the sun appears next week, so too will a prolonged stretch of seasonably cool weather. Daytime highs are forecast to drop into the mid- to upper teens for much of the next week.

Today’s seasonal daytime high in Winnipeg is 24°C while the seasonal overnight low is 11°C.

Fall-Like Weather Moves In

An Arctic ridge will bring chillier, fall-like conditions to Winnipeg over the next few days.

Cooler temperatures will be in place this morning across southern Manitoba as an Arctic ridge continues its trek across the province. The city will see sunshine give way to some afternoon cloudiness today with breezy north-northwest winds near 20 km/h. Temperatures will be cool with a high of just 20°C. The clear skies will continue tonight with a low near 6°C and diminishing winds.

On Thursday, more seasonal temperatures will return to the region as the Arctic ridge moves off into Ontario. Winnipeg should see a high temperatures near 23°C with a southeasterly wind near 20 km/h developing in the afternoon. Skies will stay mainly sunny through the day. The city will see a few clouds overnight as temperatures dip to a low near 12°C.

Cloud cover will push in early on Friday as a large trough of low pressure moves towards the region. It will be a moderately windy day with southerlies into the 30 gusting 50 km/h range developing in the morning. Temperatures will climb into the mid-20s before showers spread into the region in the afternoon. The chance for showers–along with a slight risk of a thunderstorm–will continue right through the night. Winnipeg will see a mild low on Friday night near 17°C.

Long Range Outlook

A rather unsettled weekend is on tap for much of southern Manitoba. The slow-moving upper trough is forecast to produce several rounds of showers and/or thunderstorms over the region Friday night through Tuesday. Temperatures look to hover near seasonal values with southerly winds on Saturday turning northwesterly for the first half of next week.

Today’s seasonal daytime high in Winnipeg is 24°C while the seasonal overnight low is 11°C.

Sunny and Seasonably Cool Weather Ahead

Winnipeg will see plenty of sunshine over the next three days with daytime highs falling into the low 20s.

It will be a beautiful start to the week in Winnipeg as temperatures climb to a seasonal 25°C under plenty of sunshine. A weak ridge of high pressure over the region will keep winds light as well; the city will see generally westerly winds of 10 to 20 km/h.

An approaching low will trigger a few showers and/or thunderstorms this afternoon over western parts of the province. Heading into the evening, this area of instability will shift eastwards into the Red River Valley, bringing scattered showers with a risk of thunderstorms later in the evening. This activity should clear out overnight with temperatures dipping to a low near 13°C.

Any remaining cloud will clear out early Tuesday morning as a ridge of high pressure builds in from the northwest. This ridge will bring the city plenty of sunshine over the next couple days with highs in the low 20s. Winds will be breezy out of the northwest both days; Tuesday should see them strengthen to 30 gusting 50 km/h followed by lighter winds on Wednesday of 20 to 30 km/h. Both nights will bring lows in the high single-digits.

Long Range Outlook

Temperatures should rebound back to seasonal values for Thursday as the ridge moves off to the east. Heading into the weekend, it looks like a large upper trough will swing towards the region, bringing several chances for rain or thunderstorms through the weekend.

Today’s seasonal daytime high in Winnipeg is 24°C while the seasonal overnight low is 11°C.

A Bit More Warmth Before Mid-Week Pattern Change

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.