Tag: Windy

Major Pattern Change Sends Arctic Blast Southwards

Brad Leave a comment

Winnipeg will see a major shift in temperatures this weekend that will mark the start of a long stretch of colder weather.

A series of passing lows will keep Winnipeg cloudy heading into the weekend with a couple of chances for flurries. A brisk southerly wind will develop this morning, increasing into the 20 to 30 km/h range. This cool outflow from a departing ridge will keep temperatures slightly cooler again today with a high eventually reaching -6°C. An approaching shortwave will bring a chance of flurries to the region later this afternoon into the evening. Skies will stay cloudy overnight with a chance of flurries as temperatures dip to a low near -10°C. The winds will ease in the evening.

Winds will pick up out of the south again on Saturday as an organized clipper system arrives. The city will see a chance for some light snow as a warm front moves through in the morning. Winds will pick up out of the south into the 30 to 40 km/h range in the morning as temperatures head to a high near -1°C. The wind will ease late in the day.

The major pattern shift begins on Saturday evening as a cold front sweeps southeastwards across the province. It will push through, bringing a bit of light snow and then ushering in northwesterly winds of 30 to 40 km/h. There northwest winds will be pushing in much colder air sourced from a large Arctic high moving into the Prairies. Temperatures will dip to a low near -17°C on Saturday night.

GDPS 2m Temperature Forecast valid 18Z Sunday December 8, 2019
Bitterly cold air will begin building into Manitoba on Sunday as a potent Arctic high pushes into the region.

Temperatures will barely recover on Sunday as skies clear out and winds gradually ease through the day. The Arctic high will push into the southern half of the province on Sunday night, sending temperatures into the low minus 20’s overnight.

Long Range Outlook

Unfortunately, there is little improvement for Winnipeg in the medium-range forecast. Cold weather will continue to persist for several more days.

GDPS 850mb Temperature Anomaly Forecast valid 00Z Tuesday December 10, 2019
The forecast 850mb temperature anomalies show Winnipeg embedded within a large outbreak of below-normal temperatures to start next week.

The city will spend much of the week with daytime highs near -20°C and overnight lows in the mid- to low -20’s. Wind chills will also begin to move into hazardous territory with values in the -30 to -40 range possible during the nights.

Moderation towards seasonal temperatures should occur near the end of the week.

Today’s seasonal daytime high in Winnipeg is -8°C while the seasonal overnight low is -17°C.

Cold Front Brings Seasonal Temperatures Back to Winnipeg

Brad Leave a comment

Winnipeg will get one more seasonably mild day before a cold front brings cooler temperatures back to the region.

Mild temperatures will stick around for one more day in Winnipeg with the city seeing variable cloudiness and light westerlies. A cloudy morning will give way to mixed skies with a high near -1°C. A cold front pushing into the region this evening will bring more clouds and a chance of flurries. Winds will shift to the northwest behind the front overnight as temperatures dip to a low near -9°C.

Thursday will bring north-northwest winds of 30 gusting 50 km/h to Winnipeg as an Arctic ridge builds in from the northern Prairies. This push of cooler air will keep temperatures steady through the day around -9°C. Skies will be cloudy through the morning and some clearing will gradually push towards the region through the afternoon.

RDPS 2m Temperature Forecast valid 15Z Thursday December 5, 2019
A large Arctic ridge will push into Manitoba on Thursday, bringing breezy northwest winds and cooler temperatures to the region.

The city will see a chance of flurries through the day but little to no accumulation. Winnipeg will see mainly clear skies for a bit on Thursday night, allowing temperatures to drop to a low near -16°C. More cloud will push back into the Red River Valley overnight.

Winnipeg will again see mostly cloudy skies on Friday with a stiff southerly wind increasing into the 30 to 40 km/h range. The cloud and southerly wind coming out of the Arctic ridge will keep temperatures seasonal with a high near -7°C. Winds will ease on Friday night with temperatures dropping a degree or two.

Long Range Outlook

A more organized low pushing into the region on Saturday will bring warmer temperatures to the region with daytime highs climbing back to around -2°C. As it crosses on Saturday afternoon there will be a good chance for some snow, then a potent shot of cold air follows.

By Monday, daytime highs will dip into the -15 to -20°C range, with daytime highs of -20°C possible on Tuesday and Wednesday. Yikes! These cold temperatures will stick around at least until the end of the week.

Today’s seasonal daytime high in Winnipeg is -7°C while the seasonal overnight low is -16°C.

Week’s Rainy Start Leads to Much Cooler Weather

Brad Leave a comment

More rain will move through the region today, followed by northwest winds and much cooler conditions.

Rain will move through the region today as a Colorado Low moves into NW Ontario. The rain will spread from southwest to northeast across the Red River Valley and have a sharp edge on the northwestern side. This will result in rainfall accumulations dropping from around 5 mm to nothing over a short distance. Winnipeg should see around 5 mm of rain, although the city could see a bit more if the band ends up shifting a bit west or east.

Generally speaking, the eastern Red River Valley into the southeast corner of the province will see 5 to 10 mm of rain. Narrow convective banding could result in localized accumulations of 10 to 20 mm. The western Red River Valley will see amounts generally around 5 to 10 mm in the southwest diminishing to nothing near Portage la Prairie.

While the NAM rainfall accumulations in the Red River Valley for today might end up a tad on the high side, the areas that will see rain look well-represented.
While the NAM rainfall accumulations in the Red River Valley for today might end up a tad on the high side, the areas that will see rain look well-represented.

Aside from the rain, highs today will be a seasonably cool 7°C in Winnipeg. A brisk northwest wind will develop through the day, picking up to 30 gusting 50 km/h this afternoon. The wind will then increase to 40 gusting 60 km/h this evening. While the rain will taper off later today, the chance for showers (or eventually flurries) will persist overnight. Temperatures will dip to a low near +2°C.

Cloudy skies will continue in Winnipeg on Tuesday with a continued chance for some scattered showers or flurries. The moderate northwest winds will continue and temperatures will cool with a high of only 5°C. Skies will stay cloudy on Tuesday night with winds beginning to ease as temperatures head to a low near 0°C.

The sun might be able to poke out on Wednesday, but Winnipeg will likely continue to see mainly cloudy skies. The cold air will continue to push into the region, keeping highs cool at just +3°C. Winds, while lighter than Tuesday, should still persist out of the northwest at 20 to 30 km/h. The cloud cover will begin to break up a bit on Wednesday night as the winds finally ease. Winnipeg will see a low near -3°C on Wednesday night.

Long Range Outlook

The rest of the week should bring mixed skies to the city and dry conditions. The cool weather will persist on Thursday, but seasonal temperatures may return (alongside some cloud) for the end of the work week into the weekend.

Today’s seasonal daytime high in Winnipeg is 8°C while the seasonal overnight low is -2°C.

Seasonal Temperatures Return to Winnipeg

Brad Leave a comment

After one more cool day, breezy southerly winds develop and usher seasonal temperatures back into the region.

A ridge of high pressure moving through southern Manitoba today will keep winds light and temperatures cool. In Winnipeg, the high will sit near 5°C. With so much moisture stuck in the region, skies should remain mostly cloudy through the day. A light southeasterly wind will develop tonight with temperatures dipping to a low near 0°C.

A warm front will move across Manitoba on Thursday, bringing breezy southerly winds. Warm air will push eastwards into the region as the wind increases into the 30 to 40 km/h range. Temperatures will climb to a high near 11°C in Winnipeg, continuing to rapidly melt the remaining snowpack. Winnipeg will see a bit of sun through the day as the clouds giving way to mixed skies. On Thursday night, the cloud cover will thicken back up with breezy winds continuing. This combination of cloud and wind will keep temperatures warmer with a low near 6°C in Winnipeg.

Breezy southerly winds will develop over the Red River Valley on Thursday.

On Friday, a broad trough of low pressure will move across the region. With cloudy skies, temperatures will continue at near seasonal values. Winnipeg should see a high near 11°C again with the southerly winds gradually easing. No significant precipitation is expected, but some scattered light rain is possible. Skies will become mixed again on Saturday night as a westerly wind builds into the region behind a weak cold front. Temperatures will dip down to a low near 5°C.

Long Range Outlook

Seasonal conditions will continue into the weekend with highs in the low teens and overnight lows in the low to mid-single digits. The region should see some sun return for Saturday, but another disturbance moving into the region on Sunday will bring more cloud with a chance of light rain, particularly overnight into Monday.

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