Tag: Windy

Hot and (Briefly) Muggy Conditions Return

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Winnipeg will see more heat with building humidity before a cold front passes through on Thursday, bringing a chance of showers or thunderstorms.

An upper ridge over the province will bring another hot day to Winnipeg. The city will see daytime highs near 30°C under mainly sunny skies today. Dew points will gradually rise through the day as southerly winds of 20 to 30 km/h draw humidity northwards. This will produce humidex values approaching the mid-30s this afternoon. The wind will persist out of the south tonight near 20 km/h with increasing cloud. This will result in a warm, muggy night with a low near 21°C.

There’s a lot of diversity in the model forecast solutions for Wednesday night. Some models have no precipitation for Winnipeg, while others sustain an area of thunderstorms from southern Saskatchewan into the region. Either way, if there is going to be any precipitation it likely won’t arrive in Winnipeg until early Thursday morning. The synoptic pattern isn’t particularly favourable for sustaining nocturnal convection, but if the thunderstorms in Saskatchewan can organize early enough, they may be able to last all the way to the Red River Valley. We’ll keep an eye on it, and we’d also recommend checking out Environment & Climate Change Canada’s take on it in their thunderstorm outlook, available in our bulletin viewer.

On Thursday, a cold front will push across the province early in the day. Behind the front, moderate westerly winds of 30 to 40 gusting 50 km/h will clear skies and usher in a drier air mass. Temperatures will still be warm with a high near 29°C, but the drier conditions will make it more comfortable. Winds will continue out of the southwest at 10 to 20 km/h on Thursday night. Temperatures will head to a low near 17°C with increasing cloud.

Friday will bring breezy conditions to southern Manitoba again as a low pressure system passes to the north. Westerly winds will pick back up into the 20 to 30 km/h range in the Red River Valley with mixed to cloudy skies. There will be a chance of showers with this system as well as moisture wraps around the low. Potential rainfall amounts amounts don’t look particularly significant; just light accumulations of a couple mm look possible. Temperatures will be cooler with a high near 25 or 26°C.

Skies will clear Friday night with diminishing winds. Winnipeg will see a low near 16°C.

Long Range Outlook

Warm weather will return to the region on Saturday with highs returning to the 30°C mark with mostly sunny skies. Showers or thunderstorms will be possible on Sunday with a low pressure system forecast to move across southern Manitoba.

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

Hot and Humid Conditions Ahead

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Temperatures will soar this weekend in Winnipeg as a hot and humid air mass moves in from the south.

A building upper ridge will push increasingly hot and humid conditions into southern Manitoba this weekend. The first push of heat will arrive today with the temperature climbing to around 30°C in Winnipeg. Skies will stay mostly sunny through the day with light winds. Tonight will be warm with a low near 18°C.

Saturday will be another hot day with increasing humidity. The city will see variable cloudiness through the day depending on (a) how much blow-off from overnight thunderstorms in Saskatchewan and western Manitoba moves through in the first half of the day, and (b) how much thunderstorm activity develops in the afternoon. Winnipeg should see a high near 31°C, but may be warmer or cooler depending on how much sunshine there is. Dew points will gradually climb through the day, reaching the mid- to upper-teens by the end of the afternoon. Combined with the warm temperatures, this will result in humidex values in the upper 30s.

  • Significant mid-level instability will develop over southern Manitoba on Saturday afternoon, shown by 700-500mb lapse rates ≥ 8°C/km.
  • While surface-based convection will struggle against a capping inversion, significant instability for elevated convection will be in place Saturday afternoon across southern Manitoba.

The thunderstorm threat for the day is largely conditional; a strong capping inversion will likely preclude any surface-based convection through the afternoon. There will be steep mid-level lapse rates coupled with strong dynamics that may support elevated convection, though. The first organized threat will be midday if any convection from Friday night manages to survive through the morning. Conditions should be more settled for the afternoon, then a risk for thunderstorms will redevelop late in the day. We recommend you view ECCC’s Thunderstorm Outlook on Saturday morning for the authoritative look at the day’s convective potential. You’ll be able to view it in our Bulletin Viewer.

The warm conditions continue on Saturday night as winds ease off and then turn northwesterly by Sunday morning. Winnipeg will see a low near 19°C.

Sunday will usher in drier conditions as breezy westerly winds up to 30 gusting 50 km/h develop. Temperatures will again climb to around 30°C, but dew points will drop back into the single-digits, making for more comfortable conditions. Any leftover cloud in the morning will quickly clear out, leaving behind partly cloudy skies for the rest of the day. Temperatures will dip to a mild low near 17°C on Sunday night with winds easing.

Long Range Outlook

Next week will bring a fair amount of sunshine to the region with daytime highs generally in the 25 to 30°C range. No major precipitation events are forecast, however there may be one or two chances for thunderstorms through the week.

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

More Warmth and Sunshine Ahead; Unsettled Weather Returns At End of Week

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Warm weather continues in Winnipeg for a couple more days, but unsettled conditions will develop on Friday into the weekend.

Winnipeg will see mainly sunny skies today with temperatures climbing to a seasonably mild 26°C. Winds will be light for much of the day, then increase out of the south to around 20 km/h as a low pressure system approaches. The city will see a few clouds through the evening with a marginal chance of a passing shower or thunderstorm. It looks unlikely that Winnipeg will see anything, but the potential is there. Temperatures will head to a low near 12°C overnight with clearing skies.

Thursday will be a gorgeous day across the region as the upper ridge begins building in. Temperatures will climb to a high near 26°C under sunny skies with light easterly winds. The wind will pick up overnight into the 20 to 30 km/h range out of the southeast as a developing low pressure system strengthens over Saskatchewan. These breezy winds will help keep temperatures warm with a low of just 16°C expected. By early Friday morning, some cloud will spread into the region along with a chance of a thunderstorm.

Very warm temperatures will move into southern Manitoba on Friday.
Very warm temperatures will move into southern Manitoba on Friday.

For Friday, a high-amplitude trough-ridge pattern over the Prairies will drive the weather. This upper flow will result in the gradual strengthening of a slow-moving low pressure system near the Saskatchewan/Manitoba border. For Winnipeg, that means a breezy southerly flow tapping into hot air mass over the northern Plains. With winds in the 30 to 40 km/h range, temperatures will climb to a high near 30°C under a mix of sun and cloud. The city may see a chance for a thunderstorm early in the day, then the chance redevelops for Friday night. Temperatures will stay warm on Friday night, dropping only to around 20°C with southerly winds continuing.

Long Range Outlook

Early indications show a rather unsettled weekend for Winnipeg. Friday’s low near the SK/MB border will stall over the province, bringing several chances for rain or thunderstorms to the city through the weekend. The weekend will start warm, but should cool towards seasonal temperatures for Sunday. Next week looks to bring settled conditions with near-seasonal temperatures.

Today’s seasonal daytime high in Winnipeg is 22°C while the seasonal overnight low is 9°C.

Breezy Conditions With Seasonably Cool Temperatures Ahead

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Winnipeg will say goodbye to the hazy skies and seasonably warm temperatures as a cold front ushers an Arctic ridge back into the region for the weekend.

Breezy northerly winds near 30 gusting 50 km/h behind will bring markedly cooler temperatures to Winnipeg today. After reaching 30.4°C yesterday, the city will find itself over 10°C cooler with a high of just 18°C. Skies will be sunny, but it’s likely that we’ll see some haze in the morning as forest fire smoke moves through. The winds will ease off this evening as temperatures head to a rather cool low near 4°C under clear skies.

Temperatures will be even slightly cooler on Saturday as the Arctic ridge builds into the region. Winnipeg will see a high of 17°C with breezy northerly winds picking back up in the morning under sunny skies. With the ridge moving through on Saturday night, temperatures will cool off to another cool low near +3°C.

Sunday will be pleasant with mainly sunny skies and light winds. Temperatures will start to recover; Winnipeg should see a high around 20°C. Winds will begin to pick up out of the southeast on Sunday night as a low pressure system over Alberta begins to push eastwards across the Prairies.

Long Range Outlook

The heat returns next week with highs climbing back into the upper 20s to start the week. This weather pattern will differ from the heat on the weekend; instead of a dry westerly flow, southerly winds in the low level will begin pulling humidity northwards out of the American Plains. With disturbances cross the region being able to tap into some moisture, it’s likely that Winnipeg will see variable cloudiness with chances for showers or thunderstorms.

The warm weather looks to continue right through the week. Summer arrives! This also means that Winnipeg will likely be entering into the start of the summer severe weather season over the next week or two. We’d like to remind our readers that you can access Environment & Climate Change Canada’s official thunderstorm outlook product on our bulletin viewer. This product updates twice a day: first for “today” during the early morning, then for “tomorrow” in the afternoon. It’s a great resource for finding out what sort of thunderstorm activity may occur in your area!

Today’s seasonal daytime high in Winnipeg is 22°C while the seasonal overnight low is 8°C.