Tag: Below-Normal Temperatures

Sunny and Cool Conditions Ahead

Brad

Winnipeg will see copious amounts of sunshine through the rest of the week, but seasonably cool temperatures have settled into the region.

Winnipeg’s forecast for the coming days is short but sweet: sunny. Other than a few passing clouds this morning, skies should stay essentially clear for the coming 3 days. Highs will slump to around 10°C with overnight lows dipping below freezing each night.

GDPS 2m Temperature Anomaly Forecast valid 00Z Friday May 8, 2020
Forecast temperature departure from normal. While parts of the western Prairies will see seasonably mild conditions, Manitoba will be locked into cooler weather.

Winds will be a bit breezy out of the north today at 20 to 30 km/h. Thursday will be the windiest day of the next three with northerly winds strengthening to 30 gusting 50 km/h. Winds will be lighter on Friday out of the north at 15 to 25 km/h. Winds will ease to light each of the coming nights.

Long Range Outlook

This cool weather is the result of a persistent upper-level flow that has ridging over the west coast and troughing over Hudson Bay and the eastern Arctic. This setup results in a north-northwest flow over Manitoba that supplies plenty of cool air to the region. This will continue until this upper-level pattern breaks down.

Unfortunately, there won’t be any major changes until sometime in the middle of next week when the Hudson Bay vortex begins to shift and break down.

Today’s seasonal daytime high in Winnipeg is 18°C while the seasonal overnight low is 4°C.

Cool Weather Ahead with More Showers

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Winnipeg will continue to see seasonably cool conditions this week with another round of showers arriving tonight.

A disturbance moving eastwards across Saskatchewan will bring increasing cloudiness to southern Manitoba today. Temperatures will stay seasonably cool in Winnipeg with a high near 13°C. Winds will stay out of the southeast at 15 to 25 km/h through the day, then ease this evening. Showers will spread across southwestern Manitoba today, then into the Red River Valley this evening. The showers will persist through the night as the temperature dips to a low near 5°C.

The showers will come to an end on Tuesday as temperatures rebound to around 12°C. By the time it tapers off, areas along the western escarpment and closer to the American border will receive 5 to 10 mm of rain, while other areas along the Trans-Canada Highway corridor see only 2 to 5 mm. Winds will be light out of the north through the day.

On Tuesday night, the cloud cover will begin to break up as temperatures head to a low near +2°C.

RDPS 48hr. Precipitation Accumulation valid 00Z Wednesday May 6, 2020
Forecast event-total rainfall amounts suggest totals of 5-10 mm across much of southern Manitoba. Due to the showery nature of the precipitation, amounts will likely be more variable than this map suggests within the area of precipitation accumulation.

Wednesday will see the return of the sun as cooler air once again slides into the region from the north. Winnipeg will see a high of only 10°C, much cooler than seasonal. Winds will be out of the north at 20 to 30 km/h. A ridge of high pressure will bring clear skies and calm winds on Wednesday night with lows dipping back below freezing.

Long Range Outlook

The long-range forecast looks dry but cool. Daytime highs of 8 to 12°C are forecast through the second half of the week and the weekend. A return towards seasonal conditions looks likely in the second half of next week.

Today’s seasonal daytime high in Winnipeg is 17°C while the seasonal overnight low is 3°C.

Snowy Transition Into the Deep Freeze

Brad

A disturbance tracking through Manitoba will bring accumulating snow tonight followed by much colder temperatures.

It will be a seasonably cool day in Winnipeg today with a high near -16°C as clouds spread into the region ahead of the approaching disturbance. Winds will pick up out of the southeast this afternoon to 30 gusting 50 km/h, producing uncomfortable wind chills in the -25 to -30 range. Snow will spread across the Red River Valley later this afternoon, but will stay light until the evening. Temperatures will continue to rise through the night as the wind gradually eases.

Skies will stay cloudy on Thursday as the snow tapers off through the day. Winnipeg will likely end up with a total of 10 to 15 cm of fresh snow from this system. Temperatures will climb a bit to a high near -11°C. The cloud cover will begin to break up on Thursday night with winds picking up out of the west to around 20 km/h. Temperatures will head to a low near -22°C.

NAM 24hr. Snowfall Accumulation (10:1 Ratio) valid 21Z Thursday January 9, 2020
Southern Manitoba will see a widespread accumulating snow Wednesday night into Thursday with some areas receiving as much as 10 to 15 cm.

The sun will return on Friday, but unfortunately it’s because of a large Arctic ridge moving into the province. As a result, Winnipeg will see seasonably cold temperatures with a high of only -18°C. Those westerly winds will continue for much of the day, gradually diminishing through the latter half of the afternoon. Skies will be partly cloudy over the region for much of the day, but will clear completely for Friday night. With calm winds, temperatures will head to a low near -30°C.

Long Range Outlook

The cold weather will be sticking around for a while. Highs will generally be well below seasonal averages through the next week, except for Sunday when a passing low brings near-seasonal temperatures for a day. The sun should be around for Saturday, but it looks like mixed to cloudy conditions will develop for the end of the weekend through the first half of next week.

Today’s seasonal daytime high in Winnipeg is -13°C while the seasonal overnight low is -24°C.

Arctic Chill Grips Winnipeg

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Seasonably cold weather will stay entrenched over southern Manitoba for the next few days.

Cold Arctic air will continue to pour southwards across the eastern Prairies this week. The Polar Vortex will sit over Hudson Bay for much of the week, maintaining a strong cross-polar flow. This will keep a steady stream of cold air streaming from the High Arctic down to the eastern Prairies that then curls off to the southeast across the northern United States.

This will keep temperatures cold, but nowhere near record values. Winnipeg will see a high near -17°C today with light winds. Skies will be mainly sunny through the day, but cloud will spread in tonight alongside a weak low moving into the region. Winnipeg will see clouds with flurries through the first half of the night with winds increasing out of the northwest to 30 km/h. Skies will clear out for the second half of the night as temperatures drop to a low near -27°C. Wind chill values will dip into the mid-minus 30s.

GDPS 500mb Wind Speed Forecast valid 21Z Tuesday December 10, 2019
The Polar Vortex will support a cross-polar flow for the next few days, bringing below-seasonal temperatures to the eastern Prairies.

Skies will clear on Tuesday bringing plenty of sun to the city, but it will be downright cold with a daytime high near -20°C. Winds will be light out of the west. Temperatures will drop to a low near -28°C on Tuesday night with light northwest winds. Winnipeg will see sunny skies with a high near -20°C on Wednesday as an Arctic high moves across the region. Winds will be out of the west-southwest near 20 km/h.

Some cloud will push into the region on Wednesday night as more seasonal temperatures begin working into the region. The city should see a low near -25°C.

Long Range Outlook

The second half of the work week will see temperatures returning to seasonal values with plenty of cloud cover. Light snow is possible later Thursday into Friday morning. The weekend should bring mixed skies with highs of -15 to -10°C and overnight lows in the mid-minus teens.

Today’s seasonal daytime high in Winnipeg is -9°C while the seasonal overnight low is -18°C.