Cooler Weather Ahead

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Winnipeg will see relief from the heat this week as an Arctic high brings slightly below seasonal temperatures to the region.

A series of cold fronts sweeping through the province over the last 24 hours are ushering in cooler temperatures from the north, bringing an end to the intense heat that’s been in place over the region. This cooler air mass will be brought by a sprawling Arctic high building into the Prairies.

Winnipeg will see a seasonably warm day today with a high near 26 °C under mainly sunny skies. Winds will pick up out of the north into the 30–40 km/h range for the afternoon. The clouds will thicken up heading into the evening as an upper-level disturbance pushes into the region. Another cold front will push through at the surface tonight, keeping winds up at around 20 km/h. This upper-level disturbance will bring a chance of rain to the city, but the cold front will likely shunt everything southwards a bit. It’s likely that the rain moving through will just glance Winnipeg, or move completely south of the city. Temperatures will head to a low near 11 °C.

RDPS 2m Temperature Forecast valid 21Z Monday July 5, 2021
The southern Prairies will see seasonably warm conditions today, but a cold front pushing southwards will bring cooler temperatures for Tuesday.

Winnipeg will find itself behind a second cold front on Tuesday with much cooler weather. Temperatures will climb to a seasonably cool 21 °C with partly cloudy skies as the overnight system clears out. The wind will keep put out of the north-northeast at 20–30 km/h. These winds may bring plumes of smoke into the region from fires burning east of Lake Winnipeg. How thick the smoke ends up being depends on a lot of nuance. If you have sensitivities to smoke, be sure to keep on the lookout for any special air quality statements issued by ECCC. Winds will ease Tuesday night with temperatures heading to a low near 10 °C.

Winnipeg will see plenty of sunshine on Wednesday with a near-seasonal high near 25 °C. Winds will be light through the day, and any smoke is left in the area should clear out early. Otherwise, it should be a beautiful day for the city. Temperatures will head to a low near 14 °C on Wednesday night with an increasing southerly wind.

Long Range Outlook

Unsettled conditions will develop over the region on Thursday as a warmer air mass begins to return. Winnipeg will see cloudier conditions on Thursday with a chance of showers, followed by a bit more sun and warmer temperatures on Friday. The heat is back for the weekend with highs in the low 30s and overnight lows in the upper teens.

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

Hottest Days Arrive

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Winnipeg will see its hottest days of the heat wave ahead, but some relief will begin to work into the region on Sunday.

The massive upper high over the region will keep skies mainly sunny over the next two days and temperatures hot. Daytime highs will reach the mid-30s today and tomorrow in Winnipeg. Fortunately, the dew point will stay a comfortable range through the next couple days. Although it won’t be humid, the heat will be intense with little relief at night; lows will only reach around 22 or 23 °C both tonight and tomorrow night.

A trough approaching the province on Saturday will bring breezy southerly winds of 30–40 km/h and some afternoon cloud to the Red River Valley. Heading into the night, the trough will bring a chance of showers or thunderstorms to the region as it moves into the Red River Valley.

The chances for any rain will taper off on Sunday morning as the trough moves through. In its wake, breezy northwest winds in the 30–40 km/h range will develop. Skies should clear out in the afternoon with a high near 32 °C. Temperatures will head to a low near 18 °C on Sunday night

Long Range Outlook

Temperatures will return to seasonal values for the start of next week with variable cloudiness. Conditions look likely to turn unsettled around mid-week, with the potential for a couple rounds of showers/thunderstorms in the second half of the week.

Today’s seasonal daytime high in Winnipeg is 25 °C while the seasonal overnight low is 13 °C.

The Heat is On

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Winnipeg’s daytime highs will slowly warm this week as the immense dome of hot air over western Canada slides eastwards.

Winnipeg’s forecast: sunshine and heat. A potent upper high continues to sit over western Canada continues, baking British Columbia and the Pacific Northwest with record-shattering heat. This upper feature will slowly move from southern Alberta into Manitoba over the second half of the week.

To start off Wednesday, the Winnipeg area will see a few clouds as the remnants of some overnight convection in the Interlake drift south. There’s a small chance that some of the activity will survive into the region, but anything remaining will taper off quickly through the morning. As the upper high approaches, conditions will stabilize over the province and temperatures will climb. Winnipeg’s high will increase from around 31 °C today to 35 °C by the end of the week. Overnight lows will also creep towards the 20 °C mark.

RDPS 2m Temperature Forecast valid 21Z Friday July 2, 2021
Intense heat will spread through the entire Prairies this week. Virtually everywhere that isn’t near a notable body of water will see temperatures climb into the mid- to upper-30s by Friday.

Winds will stay light over the next few days, gradually shifting from northerly today to southerly by Friday. The forecast shows no chance for rain.

Long Range Outlook

The heat will increase further this weekend with highs climbing into the upper 30s on Saturday. The heat will ease back to the low 30s on Sunday, then into the upper 20s to start next week. Some instability is forecast to return mid-week as temperatures once again climb back into the 30s.

Today’s seasonal daytime high in Winnipeg is 25 °C while the seasonal overnight low is 13 °C.

Dry, Hot Weather Ahead

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Summer heat arrives this week for Winnipeg with a prolonged stretch of hot, dry weather.

The weather driver for Winnipeg this week will be a potent upper-level high that is currently situated over British Columbia. This feature is responsible for a dangerous, record-setting heat wave over the region right now. In fact, yesterday the town of Lytton, B.C. set a new record for hottest temperature recorded in all of Canada at 46.6 °C, beating out the previous record of 45.0 °C set in both Yellow Grass and Midale, SK on July 5, 1937. And records aren’t just falling in British Columbia, they’re being smashed by 5–10 °C.

This feature will slowly drift eastwards this week, gradually weakening as it pushes across the Prairies. But it will continue to bring several days of record-shattering heat to British Columbia and Alberta.

RDPS 2m Temperature Forecast valid 21Z Wednesday June 30, 2021
Daytime highs will reach around 30 °C in Winnipeg mid-week. Note the temperatures in excess of 40 °C forecast for northern Alberta.

Winnipeg will see daytime highs climb to around 30 °C over the coming days with lows increasing into the upper teens. The city will see plenty of sunshine over the next few days with just a few clouds around. Winds will pick up out of the north to around 20 km/h today, then ease tonight and stay light over the next couple days. As mentioned at the top, no notable precipitation is in the forecast. There is a slight chance that a few showers may move through overnight Tuesday or very early Wednesday morning, but it doesn’t look particularly likely at this point.

Long Range Outlook

The rest of the week will be more of the same with temperatures increasing further. Highs should reach the mid-30s by the weekend with overnight lows warming to around 20 °C. No precipitation is expected through the second half of the week.

Today’s seasonal daytime high in Winnipeg is 25 °C while the seasonal overnight low is 12 °C.