Summer Scorcher Leads to Unsettled Weather

The summer heat will gradually wane over the coming days as unsettled conditions move into the region.

A large upper ridge over the Prairies will bring another day of scorching weather to southern Manitoba. With blazing sunshine, Winnipeg will see temperatures soar to a high near 34 °C. Dew point temperatures will stay in the mid- to upper teens, producing humidex values near 40 through the afternoon.

Tonight, a low pressure system will slide across the province, dragging a cold front with it to the east. That will bring some cloudiness to the city overnight as temperatures dip to a low near 16 °C. Heading through the second half of the night, Winnipeg will see a low chance of showers or thunderstorms as the low moves into the Red River Valley.

NAM 2m Temperature Forecast valid 21Z August 19, 2020
Scorching hot summer temperatures will be in place across the southern Prairies today.

On Thursday, any chance of rain will come to an end in the morning as the low moves off to the east. Temperatures will quickly rise to a high near 32 °C with partly cloudy skies for the rest of the day. The winds will shift to the north for the afternoon behind a weak cold front that moves through the area. Temperatures will dip to a low near 16 °C on Thursday night with a few clouds.

On Friday, a shortwave moving eastwards will run along a warm front draped across southern Manitoba. Skies will be mixed to cloudy with a good chance of some showers or thunderstorms through the day. Winnipeg should see a high near 26 °C, but it will be sensitive to the exact placement of the warm front and how much sun manages to poke out. If it ends up a tad on the sunnier side, temperatures could climb as high as 30 °C. Some marginally severe thunderstorms may be possible and there is the potential for some training storms resulting in locally high rainfall accumulations in bands parallel to the warm front.

The unsettled conditions will clear out on Friday evening with temperatures dipping to a low near 17 °C.

Long Range Outlook

The weekend will bring more settled conditions back to the region with seasonably warm highs in the upper 20s. On Sunday, a weak disturbance passing through may bring the chance for thundershowers back to the region.

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

Summer Heat Building Back In

Temperatures in Winnipeg will begin to climb back towards the 30s over the coming days.

A weakening trough of low pressure will move through Winnipeg today, bringing mild temperatures and light south winds. With partly cloudy skies, the city should see a high near 27 °C. Skies will clear for the night with a low near 16 °C.

On Thursday, a ridge of high pressure will lie draped across southern Manitoba and southeastern Saskatchewan. This will bring mainly sunny skies to Winnipeg with light southerly winds. Temperatures will be a bit warmer with a high near 29 °C, but humidity levels should still be comfortable. Thursday night should see a low near 17 °C.

GDPS 2m Temperature Forecast valid Saturday August 8, 2020
Hot summer weather will return to the Red River Valley on Friday.

Friday will be when the hot and humid weather settles back into the region. Winnipeg will see temperatures climb to a high near 32 °C and a breezy southerly wind will draw humid conditions northwards. By the end of the day, the dewpoint is forecast to reach almost 20 °C which would make for noticeably muggy conditions.

A cold front will push eastwards across the region on Friday evening into the night. It looks likely that it will support an area of showers and thunderstorms as it moves through.

Long Range Outlook

The weekend will bring more sunshine with a return to comfortable humidity levels. Both Saturday and Sunday will see high temperatures in the upper 20s.

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

Sweltering Summer Heat Continues

Hot, humid weather continues in Winnipeg this week with a chance of thunderstorms on Wednesday.

The upper ridge that has brought a hot and humid air mass to the province isn’t going anywhere any time soon. As a result, neither will the heat. Temperatures over the next couple days will continue to climb into the low 30s during the day and dip to the low 20s at night. Along with this heat, dew points in the low 20s will produce humid conditions with humidex values climbing towards 40.

Winnipeg will see a bit of cloud over the next couple days with winds out of the southeast at 20 to 30 km/h.

RDPS 2m Temperature Forecast valid 21Z Tuesday June 30, 2020
Hot, humid conditions will continue over southern Manitoba on Tuesday.

On Wednesday, a “cold” front will push across the region, bringing more cloud and some showers with the risk of a thunderstorm. Given the hot and humid air mass in place, there will likely be a risk for severe thunderstorms in the region. What exactly it will look like, though, will depend significantly on the evolution of the system over the next two days as it brings more rounds of severe thunderstorms to southeastern Saskatchewan and southwest Manitoba.

Long Range Outlook

Temperatures will cool slightly behind the cool front on Wednesday, but the heat quickly returns for Friday into the weekend. Highs will climb back into the low 30s with humidity returning to the region. It appears that a reprieve from the heat (or at least the humidity) is likely after the weekend.

Stay safe and enjoy the summer weather as best you can!

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

Sunny Skies Ahead as Heat Wave Builds In

Winnipeg will see plenty of sunshine (and wind) through the weekend as an extended period of hot weather builds into the region.

The main driving force for the weather over the coming days will be a digging west coast trough. As it deepens over the Rockies, an upper ridge will build in response downstream over Manitoba and Ontario. As a result, a deep southerly flow will develop, pumping hot air northwards out of the United States.

Today will make the beginning of the event as an upper low slumps southwards through British Columbia. Here in Manitoba, we’ll see sunny skies in the wake of the system that brought showers and thunderstorms to the region last night. Highs will climb into the upper 20s with a northwest wind of 20 to 30 km/h.

RDPS 2m Temperature Forecast valid 21Z Saturday June 27, 2020
Hot summer temperatures will build into the region this weekend, marking the start of an extended period of seasonably hot conditions.

The more notable heat will build in for the weekend. As the upper ridge continues to build, a deep southerly flow will send high temperatures to the low 30s for the weekend. Winds of 30 to 40 km/h will develop during the days, easing into the 20 to 30 km/h range at night. Those breezy overnight winds will keep overnight lows warm near 20°C.

Winnipeg and the Red River Valley will see plenty of sunshine over the next several days.

Long Range Outlook

The heat will persist right through much of next week with highs in the upper 20s or low 30s. Compounding it, though, will be the arrival of more significant humidity on Monday. Dew points will climb close to 20°C, which will not only make the heat feel worse, but also keep overnight lows hot despite weakening winds.

Unsettled conditions may Arrive for Tuesday through Thursday with the chance for widespread shower or thunderstorm activity in the Red River Valley. The heat looks to moderate ever so slightly for next weekend.

Stay safe and be sure you know about the health risks and danger signs of heat: summer is here!

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