Unsettled Conditions Break The Heat

A cold front pushing through southern Manitoba will bring a chance of showers to Winnipeg along with some relief from the heat.

Temperatures will climb to a high near 30 °C today as the summer heat continues across southern Manitoba. Smoke will also be sticking around for much of the day as well with a southerly wind near 30 km/h. By late in the day, a low pressure system will cross the province and drag a cold front south. This will bring some scattered showers to the region with the chance of a thunderstorm or two.

Winds will switch to the northwest behind the low, likely ushering one more shot of thicker smoke. Air quality be substantially degraded this evening. Cloudy periods will persist through the night with a chance of showers late in the night into Thursday morning. The smoke will begin to clear out overnight as temperature dip to a low near 18 °C.

RDPS 2m Temperature Forecast valid 12Z Thursday August 5, 2021
Showers are possible across much of central and southern Manitoba on Wednesday into Thursday morning.

There will be a small chance of a shower early Thursday morning as the cold front swings through, then skies will begin to clear out.Northerly winds pick up into the 20–30 km/h range with a high near 25 °C in Winnipeg. The city should see better air quality through the day and some sunshine through the afternoon hours. Temperatures will head to a low near 15 °C on Thursday night with easing winds.

For Friday, a ridge of high pressure to the north will bring partly cloudy skies to the region. Temperatures will climb to a high near 28 °C with light easterly winds.

The forest fire smoke should stay primarily to the east of Winnipeg on Thursday and Friday, but there will be a small chance that some of it drifts into the region from time to time.

Long Range Outlook

Warm weather will return to the region this weekend with highs climbing back towards the 30 °C mark. Another low pressure system working its way across the region will bring more humid conditions to the region with a chance of showers or thunderstorms Saturday night into Sunday.

The potential for more unsettled weather is possible to start next week, followed by a return to seasonal temperatures.

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

Hot And Smoky in Winnipeg

Winnipeg will see more smoky weather as an upper ridge sends temperatures soaring.

Winnipeg will see several days ahead with highs climbing above 30 °C as a potent upper ridge pushes eastwards across the Prairies. With the upper ridge will come broad subsidence and mainly sunny skies over the next few days.

Unfortunately, Winnipeg will continue to see periods of smoke as well. Conditions will likely be worst today, improve for tomorrow, then degrade a bit again on Wednesday.

RDPS 2m Temperature Forecast valid 21Z Tuesday August 3, 2021
Winnipeg will see very warm temperatures on Tuesday with highs in the 30s.

Overnight lows will be seasonably warm, though it will be a very warm night on Tuesday night when the warmest air is over the region.

It will stay dry over the next few days, but a few showers or thunderstorms may be possible later Wednesday. A low pressure system will be dropping southwards into the region and may trigger more scattered thunderstorms.

Long Range Outlook

Winnipeg will see a return to seasonal temperatures in the second half of the week with variable cloudiness. There might be a small chance of some showers, but no notable rainfall is likely.

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

Smoky Weekend Ahead for Winnipeg

A high pressure system building across the Prairies will spread wildfire smoke into the Red River Valley and southeastern Manitoba this weekend.

Winnipeg will start the day off with hazy conditions and a southwest wind of 20–30 km/h. Temperatures will warm to a high near 30 °C this afternoon with winds gradually shifting to the northwest as a trough slumps southwards. There will be a slight chance for showers or a thunderstorm in the latter half of the afternoon, but the activity will be more likely to develop south of Winnipeg.

Beginning tonight, Winnipeg and area will see northerly winds ahead of an approaching high pressure system. They’ll pick up to 30 gusting 50 km/h on Saturday and stay relatively light on Sunday. But through the weekend these winds will draw forest fire smoke southwards from several fires burning across the region. Thick plumes of smoke will move through the region over the coming days. They will produce reduced visibilities and very poor air quality.

RAP-SMOKE Near-Surface Smoke Forecast valid 07Z Sunday August 1, 2021
Portions of the Red River Valley along with all of southeastern Manitoba will see dense smoke plumes at times this weekend from wildfires burning east of Lake Winnipeg.

For Winnipeg, two significant air quality events are forecast to occur. The first will start tonight into Saturday morning and the other will begin Saturday evening into Sunday morning. Both of these events are likely to produce extremely poor air quality. While there will be some measure of improvement between them, that isn’t to say that air quality will become “good”. It is likely that much of the Red River Valley and southeastern Manitoba will see generally poor air quality through the coming weekend. Some improvement is likely into next week as the winds begin to shift.

While the skies won’t have many clouds on Saturday or Sunday, there will be a layer of smoke aloft blanketing the region much of the weekend. Highs will climb into the upper 20s with lows in the low to mid teens.

Long Range Outlook

An upper ridge will amplify over the Prairies later in the weekend and gradually shift east through next week. This will likely bring an improvement to Winnipeg’s smoke conditions, but will also bring very warm temperatures into the region. Winnipeg will likely see highs in the upper 20s or low 30s through much of next week with dry conditions.

No significant rainfall is in the forecast; combined with the week of warm weather ahead, the drought situation over southern Manitoba will continue to worsen.

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

Cooler Weather Ahead

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.