Another blast of wintry weather is on the way tomorrow. Snow and blowing snow is expected starting in the morning and lasting through the afternoon, improving in the evening. However, this will signal a pattern shift to much warmer weather for the second half of the week.

It is the 60th anniversary of Winnipeg's March 1966 blizzard - one of the worst in the city's history. Officially, 36 cm of snow fell, along with wind gusts up to 113 km/h. Here's the weather map from March 4, 1966:

A strong cold front will roar across southern Manitoba tomorrow morning, dropping temperatures and ushering in strong northwesterly winds. Expect heavy blowing snow with poor visibility in open areas - highway closures are possible as a result. #mbstorm

Here's a map showing estimated total snowfall yesterday across the eastern Prairies. Significant snow fell throughout a large part of SK and southern MB. However, in Winnipeg it felt like a non-event. As the map shows, Winnipeg ended up right at the very edge of the heavy snow.

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Congratulations, you've made it through the worst of winter in southern Manitoba. The first half of February will be much warmer! This week starts chilly, but by Thursday we should be around the freezing mark.

The wind chill hit -51 in Winnipeg this morning, which is a record low for Jan 25. That was due to a combined air temp of -38 C and 15 km/h winds. Readings of -50 and lower are uncommon. The coldest ever wind chill in Winnipeg was -57.

The low in Winnipeg this morning was -38.2 C. The -40 C mark contains to elude the city, with the last such reading now almost 20 years ago, on February 5, 2007. The provincial cold spot was Wasagaming, with a low of -43.0 C!

Extreme cold this morning in Manitoba. Here are some of the locations that dropped below -40 C: Wasagaming: -42.3 C Flin Flon: -42.1 C Shoal Lake: -41.8 C Roblin: -41.2 C The Pas: -40.9 C Grand Rapids: -40.9 C Extreme cold will recur again tonight.

A brief reprieve from adverse winter weather is expected today in southern Manitoba before another "MacKenzie Screamer" arrives tomorrow. Additional light snow is expected and strong winds will again produce significant blowing snow. Poor travel conditions should be expected.

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Visibility in the Red River Valley is now near zero at times due to heavy snow and blowing snow. Winds will continue to increase this afternoon. #mbstorm

Snow is getting underway in the Red River Valley from the next Clipper. Winds will also increase this afternoon, creating poor travel conditions. Many highways in western Manitoba are already closed. Use caution if heading out - conditions will worsen quickly.

On tomorrow's noon surface forecast map you can see the next Clipper approaching from Saskatchewan. Meanwhile today's Clipper is still trucking along through central Quebec. (data from the @weatherlogics.bsky.social WRF).

Today's @weatherlogics.bsky.social 4-km WRF simulation over western Canada suggests that blizzard conditions are likely to redevelop tomorrow in southern Manitoba. Snow will move from west to east during the day, along with southerly winds of 40-60 km/h gusting to 60-80 km/h.

While tomorrow's Alberta Clipper technically isn't as strong as today's, it may still pack a punch. Strong southerly winds are expected in the Red River Valley in the afternoon, along with more snow, so near blizzard conditions are possible again!

The worst of the Alberta Clipper is now over, but conditions will remain poor today as blowing snow continues. Winds will gradually ease, calming right down tonight as high pressure builds in. High pressure won't last long - the next Clipper arrives tomorrow!

This storm officially met blizzard criteria in Winnipeg as visibility at the airport remained below 400 m (0.25 miles) for at least 4 consecutive hours (criteria met for 6 hours total). Note: The definition of a blizzard is now different from that of a blizzard warning.

Weatherlogics users report freezing rain with this initial band of precipitation that is moving across southern Manitoba. Watch for slippery conditions today before the heavy snow and wind begins tonight!

A significant Alberta Clipper is still on track to impact the Prairies starting tomorrow. For southern Manitoba, the worst will be Wednesday night-Thursday morning. Travel conditions will be very dangerous and highway closures are likely. Here is our latest snowfall forecast.

Winnipeg has set a new daily high temperature record today. The high up to 10:39 am was 5.9 C, beating the previous record of 5.6 C set in 1877. Even warmer temperatures are being reported elsewhere, with values of 7-8 C in Morden/Portage/McCreary.

A wild week of weather is on tap for southern Manitoba, starting tonight: - An Alberta clipper will bring a chance of freezing rain tonight and early Tuesday. - Tuesday will see near-record highs as a mild Pacific air mass sweeps in. continued...

Some cold temperatures in the Yukon today - even by arctic standards! These are air temperatures only, not the wind chill:

A significant snow event is getting underway across Saskatchewan and Manitoba. Total snowfall ranging from 10-20 cm can be expected in eastern SK and western MB. The map below shows total predicted amounts by Tuesday night. #mbstorm #skstorm

Canada now has a colour-coded alerting system. My early thoughts: 1) Emphasizing colours (yellow-orange-red) is good because severity is more obvious than calling things watches-warnings-advisories. 2) The main issue I see is how these are going to be issued.

Canada now has its own AI weather model (developed by ECCC; it is meant to be equivalent to GDPS). Here is the snow forecast produced by model for this week's system (Monday-Tuesday):

Last night’s northern lights over Winnipeg!

The growing season finally came to an end last night in urban Winnipeg. The Forks recorded a low temperature of -1.1 C, the first frost since April 30. This capped a remarkable 175 day-long growing season.

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Frost occurred over most of southern Manitoba this morning, with a hard freeze in Western Manitoba. Some locations in Westman got as low as -10 C! #mbwx

The growing season officially ended in Winnipeg last night with a low of -2.1 C at the airport. The growing season was 152 days long, or the 4th longest on record. The longest ever was 157 days in 1963. It began this year on May 8th. #mbwx

There was a hard freeze in southern Saskatchewan this morning. Mankota, SK got all the way down to -10 C! Frost also occurred in Western Manitoba, with the lowest temperatures near the Saskatchewan border. Frost is likely again tonight in Westman - it will be patchy farther east.

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I spotted some unusual mammatus clouds overhead this afternoon. They’re unusual because normally mammatus are associated with strong thunderstorms. In this case there are just some rain showers in the area. #mbwx

Watching an area of thunderstorms that are developing over southeastern MB. These storms are being triggered semi-parallel to a stationary front over northern Minnesota. Should they continue to expand tonight, locally heavy rain is possible at they move slowly northeast. #mbstorm

This will be the last week of summer-like weather in southern Manitoba, with temperatures running about 10°C above normal. Conditions are expected to return to normal next week with highs sinking back into the mid teens. #mbwx

Here is a summary of rainfall totals from last night's storm: Steinbach: 142 mm (5.6 in) Kleefeld: 125 mm (4.9 in) La Broquerie: 122 mm (4.8 in) Niverville: 99 mm (3.9 in) Sprague: 86 mm (3.4 in) Marchand: 83 mm (3.3 in) Blumenort: 52 mm (2.1 in) Ste. Agathe: 49 mm (1.9 in)

Another series of training thunderstorms brought a flash flood to SE Manitoba overnight. Up to 150 mm fell in the Steinbach area. The swath of heavy extended from Niverville southeastward to the Ontario border. This rain gauge in Steinbach maxed out at over 5 inches (125 mm).

Yesterday was the "earliest" single-digit high on record in Winnipeg, as the temperature only reached 9.0 C:

The headlines this summer in Winnipeg were smokey and dry. Temperatures were very close to normal overall.

An early frost event occurred in Saskatchewan this morning. Numerous low temperatures were around or just below the freezing mark: Indian Head: -0.6 C Yellow Grass: 0.2 C Coronach: 0.6 C Broadview: 1.1 C Estevan: 1.0 C Weyburn: 2.2 C Regina: 2.3 C Moose Jaw: 2.4 C

We are excited that our peer-reviewed and report-based hail climatology for Canada has been published in the The Journal of Catastrophe Risk & Resilience. The climatology shows a maximum in hail occurrence along the Alberta foothills with secondary maxima in the BC interior and southern Prairies.

Training thunderstorms produced heavy rainfall exceeding 100 mm (4 inches) in southern Manitoba overnight. Training storms are analogous to a freight train, as storms repeatedly pass over the same location. But why did this happen?

There is a risk of severe thunderstorms today in southeastern Saskatchewan and southwestern Manitoba. Any storms this evening also have the potential to produce tornadoes.

A much-needed rain event brought significant amounts to northern MB over the past couple days. Here are some storm totals: Lynn Lake: 84.7 mm Pukatawagan: 58.8 mm La Ronge, SK: 54.6 mm Tadoule Lake: 27.0 mm Thompson: 23.9 mm Snow Lake: 18.7 mm The Pas: 18.4 mm Flin Flon: 18.2 mm

A low-pressure system is bringing some significant rains to northern Saskatchewan and Manitoba today. Great news for the fire situation. The map below shows 24 hr rain totals in bold blue:

Keep an eye out for severe weather today!

The 18Z weather balloon from the University of Manitoba shows a substantial cap preventing convection over the Red River Valley. However, this cap will weaken as the day progresses and thunderstorms are still possible in southern Manitoba this evening and tonight. #mbstorm

Two dangerous tornado-warned supercell thunderstorms are currently right along the Manitoba/Saskatchewan border. If you are in southeastern Saskatchewan or southwestern Manitoba, keep an eye on the weather this evening! #mbstorm #skstorm

A summer storm in southern Manitoba.