Unsettled Conditions to End The Week

A disturbance crossing the Prairies will bring generally unsettled conditions with scattered showers and thunderstorms to southern Manitoba to round out the week.

Mixed to mostly cloudy skies will move into Winnipeg and the Red River Valley today ahead of an upper-level disturbance slowly moving eastwards through Saskatchewan. Over the next two days, unsettled conditions will produce scattered showers and thundershowers across the region. Slack winds over the region mean that the [thunder]showers will be fairly slow-moving, with local rainfall amounts of 5 to 15 mm possible. Conditions will settle for Sunday, with more sunshine building into the region under partly cloudy skies.

RDPS 24hr. Accumulated Precipitation valid 06Z Saturday June 23, 2018
Forecast 24 hour accumulated precipitation shows shows the widespread likelihood for showers across much of southern Manitoba today.

Temperatures will continue to be warm with highs in the upper twenties or low thirties. Lows in the 16 to 18°C range are forecast for the next few days.

Long Range Outlook

Next week will kick off with unsettled conditions as a southerly flow redevelops and taps into warmer, more humid air. Highs will climb back towards 30°C with muggier conditions moving into the region.

Winnipeg’s seasonal daytime high is currently 24°C while the seasonal overnight low is 12°C.

Hot, Dry Weather Continues

The summer heat will continue through the remainder of the work week with daytime highs climbing above 30°C.

A broad upper-level ridge building eastwards across the Prairies will continue to produce hot summer weather. While Winnipeg won’t see heat warnings like much of the northern Prairies are seeing1, that’s not to say that it won’t be hot. Temperatures will soar with daytime highs close to 30°C over the next several days. Overnight lows will also remain fairly warm with values in the upper teens.

RDPS 2m Temperature Forecast valid 21Z Thursday June 21, 2018
Hot temperatures will be in place for Winnipeg and the Red River Valley for the summer solstice on Thursday

Sunshine will be in abundance for the Red River Valley today and tomorrow. Some cloud will begin working into the region late Thursday as a low pressure system starts eastwards out of Alberta and across southern Saskatchewan. On Friday, skies will become mixed over the region and light southerly winds will bring more humid conditions to Winnipeg. By Friday evening, the chance for showers or thunderstorms will begin to creep back into the region.

Long Range Outlook

Saturday will continue to bring a chance of showers or thunderstorms to Winnipeg with mixed skies, but conditions will settle Sunday into the first half of next week. Temperatures will remain warm with highs in the upper 20s or low 30s and overnight lows in the upper teens.

It seems that the arrival of the summer solstice this year will be a marker for an extended stretch of hot summer weather!

Winnipeg’s seasonal daytime high is currently 24°C while the seasonal overnight low is 12°C.

  1. That’s largely because the criteria vary from region to region across the Prairies. In Manitoba, areas in the south require 2 consecutive days with highs of 32°C or greater with a low of 16°C or warmer between them. In northern Manitoba, the criteria is slightly lower with daytime highs of only 29°C needed.

Calm Weekend Brings Seasonal Temperatures and Increasing Cloudiness

Calmer conditions will settle over the Red River Valley in the wake of last night’s widespread thunderstorm activity. Winnipeg will see seasonal temperatures with increasing cloudiness through the weekend.

Winnipeg will begin the day with some cloud cover lingering from last night’s thunderstorms, but a cold front sweeping through midday will usher in drier air and bring clearing into the Red River Valley. It will still be quite warm today, though, with Winnipeg’s high expected to reach 28°C. Winds will also be light, expected to remain out of the west-southwest at 10 to 20 km/h. All in all a pleasant afternoon to follow the rather active evening across the Red River Valley last night.

Skies should remain partly cloudy to mixed tonight with a low near 15°C in Winnipeg.

Saturday will bring more cloud back to southern Manitoba as it streams into the region from the northern United States. Despite that, it will still be a fairly nice day in Winnipeg. A seasonal high near 24°C with light north winds will make for comfortable conditions to be outside. Skies will remain mixed to mostly cloudy on Saturday night with a low near 14°C.

Seasonal temperatures will be in place over the Red River Valley on Saturday with a light north wind

A ridge of high pressure pushing towards the province on Sunday will keep the weather fairly quiet with another day of seasonal highs and light north winds. Skies will be mostly cloudy as the region continues to see cloud cover spread northeast from the United States.

Throughout the weekend, there will be a slow-moving weather system moving through the northern United States. At this point it looks like all the rain associated with them should remain south of the border, held back by the ridge of high pressure over the southern Prairies.

Long Range Outlook

Next week looks fantastic for those who love summer! Skies should clear for Monday, bringing plenty fo sunshine back to the region. An upper-level ridge is forecast to build into the Prairies through the week, bringing plenty of sunshine and temperatures that climb back into the upper 20s or low 30s.

The upper ridge should also keep things dry throughout the week.

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

Weather Becoming Hot & Humid with Thunderstorms…Maybe?

A potent low pressure system developing in Alberta today will bring southerly winds to the Red River Valley that will bring heat and humidity back into the region.

Today will be a beautiful day in Winnipeg. Morning sun will give way to some afternoon cloud as temperatures head towards a high near 26°C. Humidity will be low today, and winds will continue out of the southwest at around 20 km/h. Skies should clear out in the evening, then a relatively mild night is forecast with a low in Winnipeg near 16°C. After midnight there will be a slight chance of a shower or thunderstorm as a warm front lifts through North Dakota.

Thursday will bring mixed skies to Winnipeg with southeasterly winds increasing to 30 to 40 km/h. Temperatures will climb to a high near 28°C with humidity gradually increasing through the day. Attention then turns to southeastern Saskatchewan and southwestern Manitoba. By mid- to late Thursday afternoon, the potential for a severe thunderstorm outbreak exists. All of the ingredients are there for potent storms, however whether or not the storms develop as forecast will depend significantly on the region seeing enough sunshine and heating through the day.

Thunderstorms, potentially severe, will likely be moving into western Manitoba on Thursday evening.

If all goes as currently forecast, then thunderstorms would develop and move onto western and southwestern Manitoba in the evening. Depending on how the thunderstorms evolve, the risk for severe thunderstorms with large hail and damaging winds may develop in the Red River Valley overnight. There is the chance that it misses the region, though. Some models suggest the best dynamics lift north of the region and the greatest energy collapses south. For now, know that there’s a chance of thunderstorms Thursday night, with a slight risk they’ll be severe.

Otherwise, Thursday night will a warm one with southerly winds of 15-25 km/h and a low near 19°C.

Friday will bring clearing skies to Winnipeg as a cold front sweeps through the region. It will still be warm with a high near 28°C, but the humidity should drop off markedly with the passage of the front. Winds will shift out of the west midday at around 20 to 30 km/h Winnipeg should see a few clouds on Friday night with a low near 14°C and calm winds.

Long Range Outlook

The weekend will likely bring a fair amount of cloud cover to Winnipeg as a significant storm system moves through the northern United States. At this point it looks like most of the precipitation will remain south of the border, but the Red River Valley may see some rain on Sunday afternoon into the evening. Temperatures will return to seasonal with highs of 23 or 24°C forecast for both Saturday and Sunday.

Winnipeg’s seasonal daytime high is currently 23°C while the seasonal overnight low is 11°C.