Mid-Week Slump: Cool and Unsettled Weather

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Winnipeg will see seasonably cool and unsettled conditions in the second half the work wake give way to warmer weather on the weekend.

Today will start off with a few early morning showers, then skies will gradually become mixed for the afternoon. Temperatures should reach a high near 19°C, but winds will stay brisk out of the northwest at 30 gusting 50 km/h. Late in the day, another shower or two is possible but most of the activity should stay to the west of the city. Winds will ease this evening then temperatures will head to a low near 8°C under partly cloudy skies.

Thursday will be a cool June day in the city with a high near 16°C and a north wind again near 30 km/h. The city will again see a mix of sun and cloud with a chance of showers as a cold front pushes through the region. Skies will clear out on Thursday night as winds ease and temperatures head to a low near 6°C.

RDPS 2m Temperature Forecast valid 21Z Thursday June 11, 2020
Much of southern Manitoba will see seasonably cool temperatures on Thursday.

Although cool, Friday will be a comparatively pleasant day in Winnipeg. The city will see a high near 17°C with light winds and partly cloudy skies. Temperatures will dip to a low near 7°C on Friday night.

Long Range Outlook

Warmer weather will push back into the region this weekend with temperatures returning to seasonal values. Saturday should bring mostly sunny conditions, but more cloud cover is possible. By Sunday night, the chance for showers or thunderstorms will return as another surge of warm air pushes towards the region. Next week will bring seasonably warm weather and occasionally unsettled conditions.

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

Humid Monday Gives Way to Cooler Conditions

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Winnipeg will see one more warm and humid day before cooler, drier air sweeps into the region.

Winnipeg will see temperatures, and the humidity, climb to start the work week. Skies will mix out this morning as a warm front pushes northwards through the region. Behind the warm front, temperatures will climb to a high near 28°C; with the humidity that arrives today, that will end up feeling more like the mid-30s. A cold front will begin to push across the Red River Valley this afternoon and be the focus for another round of thunderstorms. While a majority of the activity will likely develop over southeastern Manitoba, there is still a slight chance for a few showers or thunderstorms Winnipeg and areas south. Any thunderstorms that develop today will have the potential of producing severe weather with primary threats of large hail and/or damaging wind gusts.

Drier air will push into the region tonight as winds pick up out of the northwest to around 30 km/h overnight and temperatures drop to a low near 12°C. Skies will see increasing cloud through the night.

RDPS 2m Dew Point Forecast valid 21Z Monday June 8, 2020
Humid conditions will develop across the Red River Valley and southeastern Manitoba today.

Tuesday will bring mainly cloudy skies to Winnipeg as an upper trough pushes across the region. Temperatures will climb to a high near 20°C with northwesterly winds of 20 to 30 km/h. Some rain is likely over the southeastern sections of the province, but things should stay dry in Winnipeg. Temperatures will dip to a low near 10°C on Tuesday night with cloudy skies and light winds.

On Wednesday, the city will see mixed skies again as slightly cooler air continues to filter into the region. There may be a slight chance of showers as temperatures climb to a high near 20°C again. Winds will pick up out of the northwest to 30 gusting 50 km/h, making for a bit of a cooler, breezy day. Skies will stay partly cloudy overnight as temperatures dip to a low near 9°C with easing winds.

Long Range Outlook

The rest of the work week will bring seasonably cool temperatures to the city with skies on the sunnier side. For the weekend, seasonal temperatures will return with variable cloudiness.

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

Pleasant Days Ahead With Increasingly Unsettled Nights

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Winnipeg will see temperatures begin to climb again as a deep southerly flow begins pushing summer heat back towards the region. With it, though, will come increasingly unsettled overnight conditions.

Today will be a cool but pleasant day in Winnipeg. With partly cloudy skies and breezy northwest winds near 30 gusting 50 km/h, temperatures will climb to a high near 19°C. A ridge of high pressure sliding across the province will ensure the winds drop off quickly in the evening. Temperatures will dip to a low near 8°C.

On Saturday, seasonal temperatures will return to Winnipeg with highs climbing to around 22°C. Southeasterly winds will begin to pick up in the afternoon into the 20 to 30 km/h range. Skies should be mainly sunny as well, making for a great summer Saturday. Conditions will turn heading into the evening, though, as clouds move in ahead of a warm front approaching the region. Overnight, a strong low-level jet will develop, supporting a broad area of showers that will lift northwards through the night. The showers will have limited instability, so while isolated thunderstorms will be possible there won’t be a notable severe weather threat. The showers will exit the region late overnight or early Sunday morning. The southeasterlies will persist right though the night at 30 to 40 km/h and temperatures should dip to a low near 13°C.

NAM Simulated RADAR Reflectivity valid 09Z Sunday June 7, 2020
Showers will move through southern Manitoba on Saturday night.

Sunday will bring mostly cloudy skies to the region with winds gradually easing to 30 gusting 50 km/h. After Saturday night’s showers move out, the day should stay dry. The high temperature will be a bit tricky and highly dependent on how much sunshine the city ends up with. A rather warm and humid summer air mass will be moving into the region. If skies stay overcast, Winnipeg may see a high of only 23 or 24°C. If the sun manages to poke out a bit more, temperatures could reach as high as the upper 20’s. For now, we expect a few sunny breaks but otherwise mainly cloudy skies and a high near 26°C.

NAM 2m Dew Point Forecast valid 00Z Monday June 8, 2020
Humid conditions will move into Southern Manitoba on Sunday afternoon with dew points climbing into the upper teens.

It will be a warm night on Sunday night with a good chance of showers and thunderstorms. The region may see isolated to scattered severe thunderstorms on Sunday night; be sure to check ECCC’s thunderstorm outlook as the weekend progresses in our Bulletin Viewer. Temperatures will reach a low near 18°C on Sunday night with relatively humid conditions.

Long Range Outlook

To start next week, Monday will bring more hot and humid weather with high approaching 30°C and humidex values near 35. Drier westerly winds will move into the region by Monday evening, breaking the humid weather and allowing lows to return to the mid- to low teens. The rest of the work week looks to bring seasonal to slightly cool temperatures and variable cloudiness.

Today’s seasonal daytime high in Winnipeg is 22°C while the seasonal overnight low is 9°C.

Warm, Summer Conditions Ahead

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Winnipeg will enjoy mild temperatures through much of the rest of the work week with the occasional chance of showers or thunderstorms.

Today will be another warm, sunny day in Winnipeg with temperatures climbing to a high near 29°C. Skies will become a partly cloudy this afternoon as a trough of low pressure moves into the Red River Valley. Ahead of this trough, winds will pick up out of the south into the 20 to 30 km/h range. By the evening, this trough will likely produce scattered thunderstorms pushing eastwards across the valley. While these thunderstorms won’t have too much energy to work with, strong wind shear aloft may result in the potential for an isolated severe storm or two capable of nickel-sized hail and/or damaging wind gusts. The trough will move out of the Red River Valley before midnight, leaving clear skies, diminishing westerly winds, and lows near 14°C.

NAM-NMMB Simulated Composite RADAR Reflectivity valid 04Z Thursday June 4, 2020
A line of thunderstorms will likely develop on Wednesday afternoon and move across the Red River Valley through the evening.

On Thursday, the city will see another mild day, but not as hot as today. Temperatures will climb to a high near 25°C, slightly cooler in the wake of a weak cold front that moves through Wednesday night. Skies will become partly cloudy to mixed through the afternoon as winds pick up out of the west to 30 gusting 50 km/h. By evening, the region will see a chance of showers as an upper low pushes across southern Manitoba. It doesn’t look like thunderstorms will be much of a threat, but an isolated storm or two can’t be ruled out. There wouldn’t be any risk of severe weather with any that formed. Skies will clear on Thursday night with temperatures dipping to a low near 11°C.

On Friday, cooler air will filter southwards into the region in the wake of the upper low. As a result, temperatures will be cooler with a high near 20°C. Skies should stay mainly sunny as a ridge of high pressure builds into the region. Winds will be a bit breezy out of the northwest at 30 gusting 50 km/h. Skies will clear on Friday night with temperatures heading to a low near 10°C.

Long Range Outlook

A significant change in the weather pattern will develop this weekend as a deep upper trough digs down the Pacific coast and a persistent southerly flow develops over the American Plains. As a result, warmer and increasingly humid conditions will likely develop over southern Manitoba.

A series of moderately strong low pressure systems will eject northwards out of Montana into the central Prairies, bringing plenty of cloud cover and several chances for rain or thunderstorms. The unsettled pattern will likely develop Saturday night and persist right into the middle of next week.

It’s far to early to say how much, or if, Winnipeg and area will see rain from these systems. We’ll continue to watch this developing pattern and have more details on what to expect in our Friday forecast.

Today’s seasonal daytime high in Winnipeg is 22°C while the seasonal overnight low is 9°C.