Gradually Cooling in Winnipeg, Unsettled Friday Possible

Winnipeg will see temperatures gradually cool through the rest of the week with a chance for a few showers across the region on Friday.

Winnipeg’s weather over the coming days will be increasingly influenced by a slow-moving low pressure system in the United States. This low, over the Central Plains this morning, will gradually trundle northwards into Minnesota and Wisconsin by Friday. As it moves north, cloud cover will creep northwestwards and cooler temperatures will shift into the Red River Valley.

Winnipeg will see partly cloudy skies today with a weak ridge over the region. The city will see a high near 17 °C with a north breeze picking up this afternoon to 20–30 km/h. Skies will stay partly cloudy tonight with light winds and a low near +2 °C.

That weak ridge will stay in place over southern Manitoba for Thursday. On its flanks, a low over Saskatchewan will lift sharply northwards into Nunavut while to the southeast, the American low slowly lifts through Iowa. Winnipeg will see mixed skies with a high near 13 °C. Winds should be out of the northeast at around 20 km/h for much of the day. The ridge will leave overnight as a trough connecting the Nunavut low and the American low moves into the Province. Temperatures will head to a low near +3 °C with increasing cloudiness and a chance of rain showers.

RDPS 24hr. Accumulated Precipitation valid 12Z Saturday April 10, 2021
Rain will clip southeastern Manitoba on Friday, but there’s uncertainty how far west some lighter shower activity may reach.

On Friday, a sharp deformation zone will set up along a north-south line near the Red River Valley. To the east of this feature, showers will stream from Minnesota northwards towards Lake Winnipeg. To the west, it will stay dry. While the region will see a mostly cloudy day, the chance of rain will be highly sensitive to the exact location of this feature. While rain is likely over southeastern Manitoba, that chance becomes significantly more conditional in the Red River Valley. There will be a breezy north-northwest wind through the day around 30 km/h keeping highs cooler at around 9 °C.

The clouds will begin to break up Friday night as the system begins pushing off to the east. The winds will ease as temperatures head to a low near -1 °C.

Long Range Outlook

The region should see quiet weather for much of the weekend with variable cloudiness and highs of 10–15 °C. By Sunday night, forecasts show a clipper system moving out of southern Alberta and phasing with a low over eastern North America. This will produce the chance for the first significant precipitation event over southern Manitoba in some time. There is significant uncertainty right now, but forecasts suggest a windy winter storm will move through the region on Monday and Tuesday with potentially 10–15 cm of snow.

Temperatures are forecast to hover near or slightly above the freezing mark with this system, so it’s unlikely that much snow would accumulate, as it will compact and melt through the days. The potential exists for a bit of an unpleasant start to next week, but many would welcome the moisture that the storm may provide.

Today’s seasonal daytime high in Winnipeg is 7 °C while the seasonal overnight low is -4 °C.

Warm Weather With Mixed Skies

Winnipeg will see warm weather continue this week with variable cloudiness over the coming days.

The city will see a mild start to the day with temperatures quickly warming to the high near 14 °C through the morning. By midday, a cold front will begin to sweep across the Red River Valley. This will bring increasing cloudiness and a low chance of rain showers as it passes. Behind the front, moderate northwest winds of 30–40 km/h will push into the Red River Vally for the afternoon with temperatures cooling slightly. The cloud cover will push out later in the day as an area of high pressure builds into the region. Winnipeg will see temperatures dip to a low near -2 °C tonight under clear skies and light north winds.

RDPS 2m Temperature Forecast valid 18Z Monday April 5, 2021
Winnipeg will see Monday’s warmest temperatures midday before a cold front moves through the region.

On Tuesday, a broad area of high pressure will work across the region. Temperatures will still stay mild as the strengthening April sun warms the snow-free ground in Winnipeg and the Red River Valley. The city should see a high near 13 °C with light north winds. The high will also keep skies sunny right through the day. Skies will stay clear on Tuesday night with a low near the freezing mark.

On Wednesday, a pair of low pressure systems will begin to impact the region. The first will be over the United States and will spread cloud and precipitation across southeastern Manitoba into northwestern Ontario. This system will stay southeast of Winnipeg and area, only spreading some partly cloudy skies this far west or north. Winnipeg will see a high temperature near 16°C (or perhaps a degree or two cooler if it ends up cloudier). The second low will begin pushing into Saskatchewan through the day and start building warmer weather into the region. This low will spread some cloud cover into the region overnight as temperatures head to a low near +2 °C.

Long Range Outlook

A more unsettled pattern will develop for the second half of the week, bringing cloudier conditions to Winnipeg. There is little agreement on the overall pattern progression, though, and whether or not the region will see any rain is still a big question. There will the potential for a few rain showers, but no particularly notable rainfall amounts are in the forecasts with only a few mm possible here and there. Temperatures will slowly ease back towards seasonal values into next week.

Today’s seasonal daytime high in Winnipeg is 7 °C while the seasonal overnight low is -5 °C.

Warm and Windy Weekend Ahead

Winnipeg will see spring warmth spread into the region this weekend, but along with it comes several days of windy weather.

A developing low pressure complex over the Canadian Prairies and northern Plains of the United States will bring moderate southerly winds and spring warmth to southern Manitoba. Winnipeg will see temperatures climb to a high near 13 °C today with southerly winds strengthening to 40 gusting 60 km/h. Fortunately, there will be plenty of sunshine today with nary a cloud in the sky. Skies will stay clear tonight with southerly winds continuing near 30 km/h and a low near 2 °C.

It’ll be another mild one on Saturday with temperatures climbing into the mid-teens with mainly sunny skies. Those southerly winds will persist, again climbing back up to 40 gusting 60 km/h. Some cloud cover will begin pushing into the region late in the day, bringing cloudy skies for Saturday night. The winds will finally taper off overnight as a low pressure complex moves into the province. Temperatures will dip to a low near 5 °C on Saturday night.

RDPS 24hr Accumulated QPF Forecast valid 00Z Monday March 22, 2021
A low pressure system moving across southern Manitoba on Sunday will bring a chance of showers to many areas.

Winnipeg will see mostly cloudy skies on Sunday as the low pressure complex works through. A band of showers will push across the province ahead of a cold front. Most areas will see a good chance of getting some rain, but amounts won’t be too substantial. Most areas will see just a trace of some rain but some spots — mainly south and east of Winnipeg — may see 2–5 mm. Temperatures will climb to a high near 13 °C, then a cold front passes and ushers in northwest winds of 30–40 km/h. Skies will clear lat in the day followed by easing winds and temperatures heading to a low near -4 °C on Sunday night.

Long Range Outlook

Spring weather continues next week with variable cloudiness and highs in the upper single digits. Overnight lows will dip a couple degrees below freezing most nights.

Today’s seasonal daytime high in Winnipeg is 0 °C while the seasonal overnight low is -10 °C.

Windy Weather Ahead

Winnipeg’s first effort at milder temperatures will come with plenty of cloud and wind, but sunnier and warmer conditions are likely next week.

Warmer weather will build into the region today ahead of a low pressure system forming over Alberta. Skies should stay mostly cloudy today as the low gathers steam and pushes into Saskatchewan. Temperatures in the city will climb to a high near +2 °C this afternoon. As the low begins moving towards the province this evening, southerly winds will strengthen up to 40 gusting 60 km/h and persist through the night. With cloud cover and moderate southerly winds, temperatures will stay fairly steady with a low near +1 °C.

On Saturday, the low will cross through the province, bringing the warmest air with it. Th wind will ease for the morning with temperatures reaching a high near +4 °C. A potent cold front will sweep through the region midday, ushering in strong northwest winds up to 50 gusting 70 km/h. A chance for midday rain will quickly change to a chance of snow as temperatures drop in the afternoon. The chance of light snow will continue into the evening, then end as a ridge moves into the area. Skies will clear out overnight with temperatures heading to a low near -8 °C.

RDPS 10m Wind Forecast valid 21Z Saturday October 31, 2020
Strong northwest winds will develop over southern Manitoba on Saturday.

Warmer air will already be pushing back into the area on Sunday as a broad upper ridge begins building across the Prairies. The city should see a high near +2 °C with partly cloudy skies. South-southwest winds will pick up through the day into the 20–30 km/h range, then gradually ease overnight. Temperatures will fall to a low near -2 °C on Sunday night under partly cloudy skies.

Long Range Outlook

The upper ridge will continue building across the Prairies through early next week, ushering in a warmer air mass. It looks likely that daily highs may climb up into the 8–12 °C range for a few days, but one unknown is how much low-level cloud the snowpack may generate as the warmer air arrives. In some cases, extensive stratus development can keep temperatures near the surface hovering close to the freezing mark.

We’ll have to wait and see, though, how much of an impact this has. If the winds are able to keep enough of a westerly component to them, they should stay dry enough to scour out any moisture from melting and keep the sun shining through.

Near-seasonal temperatures are forecast to return near the end of the week.

Today’s seasonal daytime high in Winnipeg is 4 °C while the seasonal overnight low is -5 °C.