Weather Forecasts, Facts and News for Winnipeg & Southern Manitoba
Author: Brad
Brad lives in Winnipeg with his wife and two children and is the founder of A Weather Moment. He has loved weather from a very young age and has followed that passion through his life so far. He received a B.Sc. in Earth Sciences with Specialization in Atmospheric Sciences and is currently employed in the field of meteorology. You can find the author as WeatherInThePeg on Mastodon.
This week will start off with pleasant conditions, as we experience a nice end to the long weekend.
Labour Day will be pleasant in southern Manitoba
Monday
Monday
23°C / 8°C
Mix of sun and cloud with a chance of showers or thunderstorms
Today will be a pleasant day in southern Manitoba. Temperatures will be in the low to mid twenties with a light westerly wind and partly sunny skies. There will be a slight chance of showers or thunderstorms, but any rain should be isolated and short-lived. Overall, it will be a good end to the last long weekend of summer.
Tuesday
Tuesday
24°C / 10°C
Mix of sun and cloud with a chance of showers or thunderstorms
Tuesday will be another nice day in southern Manitoba. Skies will be a mixture of sun and cloud, with temperatures in the mid twenties. There will once again be a slight chance of showers or thunderstorms, but they’ll again be isolated.
Wednesday
Wednesday
24°C / 13°C
Mix of sun and cloud
Wednesday will once again feature seasonably warm conditions in southern Manitoba. High temperatures will be in the low to mid twenties with light winds.
Long Range
The long range forecast is a bit uncertain at this time. It looks like we’ll generally see near seasonal conditions in the short to medium term, which means temperatures in the lowish twenties. There will however be some days warmer, and some cooler, than seasonal values.
Seasonal weather will be in place over southern Manitoba as the last long weekend of the summer arrives. Conditions will be fairly dry except for a disturbance rolling through on Saturday night.
Friday
22°C / 8°C
Chance of morning showers, then clearing
Saturday
23°C / 14°C
Mainly sunny; showers or thunderstorms likely overnight
Sunday
23°C / 10°C
Morning showers or thunderstorms then clearing
All in all it’s going to be a lovely weekend with most of the chances for precipitation outside of “plan-ruining” hours. Today we’ll see a chance for some morning showers – or perhaps even an isolated thunderstorm – as a cold front passes through the Red River Valley. Winds will shift to the north behind the front and temperatures will climb to around 22°C under increasingly sunny skies for the afternoon.
Tonight will be clear with a low of around 8°C.
Saturday will be a very pleasant day with mainly sunny skies and a high near 23°C. Winds will shift to southerly through the day, but remain relatively light at 20–30km/h. Some cloud will begin streaming into the Red River Valley ahead of an approaching low pressure system that will move through on Saturday night.
Storm-total precipitation amounts forecast by the GDPS for Saturday night’s storm.
This system will be compact and intense with strong dynamics associated with it. Showers and thunderstorms will spread into the Red River Valley overnight on Saturday – likely not until late overnight. It’s unclear if much of a severe threat exists with these storms, although it does look like they could be fairly strong. Rainfall amounts will be dependent on the timing and intensity of convective activity, but in general it looks like 10–20mm of rain is likely, with isolated amounts approaching 50mm possible in worst-case scenarios.
The activity will continue into Sunday morning and clear out by mid-day. The rest of Sunday will be quite nice with clearing skies and temperatures climbing to around 22°C. Sunday night will be mainly clear with temperatures dipping near the 10°C mark.
A Beautiful Holiday Monday
For the upcoming holiday Monday, it looks like another pleasant, seasonal day with highs near 21 or 22°C and mainly sunny skies. The pattern looks to hold for much of the remainder of the week, where conditions look dry and the possibility of some warmer weather returns near week’s end.
After an early blast of fall-like weather earlier this week, Winnipeggers will be pleased to hear that summer will quickly return to Southern Manitoba.
Wednesday
24°C / 13°C
Warming up with some afternoon cloud
Thursday
27°C / 15°C
Mainly sunny. Off-chance of a late-day shower
Friday
23°C / 9°C
Morning cloud with gradual clearing
There’s little to say about the weather heading our way the next few days. Today will be a pleasant day with highs near 24°C with some afternoon cloud and winds gradually increasing out of the south to 20–30km/h. Temperatures will dip to around 13°C tonight with partly cloudy skies.
Tomorrow will be a warmer day across the region with highs near 26 or 27°C. A cold front will begin working its way through western Manitoba through the day and push into the Red River Valley overnight. Despite ample surface moisture, stronger mid-level dynamics remain further north in the Interlake, so it’s likely that the front will be relatively unimpressive through the Red River Valley, but there will still be an off-chance of some isolated strong thunderstorms. In general, showers will be much more likely along the front as it pushes eastwards. Temperatures will drop into the mid-teens Thursday night in Winnipeg with a small chance of showers.
Friday will be a cooler day thanks to the cold front that will push through on Thursday. Highs will be limited to the low 20’s and the day will start off with cloud that will then gradually clear throughout the day. The low on Friday night will drop back into the high single-digits.
Southern Manitoba will see its first blast of fall-like weather as gusty northwesterly winds draw cool air southwards over the region. Fortunately, it doesn’t look like the cold weather is here to stay and seasonal temperatures are expected to return by week’s end.
Monday
15°C / 7°C
Mainly cloudy; windy and cool with lake-effect showers possible
Tuesday
19°C / 10°C
Mainly sunny
Wednesday
23°C / 15°C
Mainly sunny
Today will be an unwelcome day for late August as abnormally cold air will move into the province behind the low pressure system that brought 20–40mm of rain to Winnipeg & the Red River Valley Saturday night into Sunday morning. Brisk northwesterly winds to around 30–40km/h will usher in this cooler air and will restrain our daytime high to just the mid-teens. Additionally, the abnormally cool air aloft and favourable wind profiles will combine to produce lake-effect showers that will spread southeastwards towards Winnipeg.
Forecast 850mb temperatures for this afternoon show a trough of cold air anchored over Manitoba.
Given that, occasional showers are likely in Winnipeg although due to the nature of lake-effect precipitation[1] the precise wind direction will determine whether or not the showers find their way into Winnipeg or whether they end up just north or just south of the city.
The clouds will clear out tonight as temperatures drop to around 7°C.
Tuesday and Wednesday will trend towards seasonal weather. Winds will be relatively light both days while the Red River Valley enjoys mainly sunny skies. Temperatures tomorrow will climb into the high teens while highs on Wednesday will reach the low 20’s. Lows on Tuesday night will bottom out around 10°C while Wednesday night sees more seasonal lows in the mid-teens.
Seasonal End to the Week
Looking ahead to the second half of the week, summer weather returns in full swing. Temperatures heading through the end of the week will see daytime highs in the mid–20’s with overnight lows in the mid-teens. The weather looks fairly dry until Friday when a weak cold front pushing across the province brings the chance for some shower or thundershower activity.
Lake-effect precipitation extends in a very narrow band along the direction of the wind. ↩
