A Break from the Deep Freeze

After enduring a cold end to December, Southern Manitoba is in store for a break from the deep freeze as milder Pacific air works it’s way across the Prairies.

850mb temperatures on Thursday afternoon

850mb temperatures from the GEM-REG model valid on Thursday afternoon. The yellow shaded area denotes warmer (above 0°C) air flooding eastwards across the Praries aloft.

As the low pressure system that brought us light snow overnight slides off into Minnesota, it will drag cooler air into Southern Manitoba behind it. Through the Red River Valley, temperatures will fall to around -13 or -14°C today as colder air from the North slumps southwards. Tonight will see temperatures drop to around -20°C with some cloudy periods and a chance of a light flurry or two.

Milder air will make it’s way into the Red River Valley tomorrow as southwesterly winds pick up to around 30km/h in the morning and begin to scour out the remaining Arctic air. Temperatures will climb up to about -5°C by the evening, marking the start of a stretch of above-normal temperatures. For early January, our normal daytime high in Winnipeg is about -13°C; over the next week, we’ll remain slightly above normal with daytime highs near -9°C punctuated by a day or two where the daytime high climbs back towards the 0°C mark. We’ll likely see plenty of sun over the next week, too, a result of the drier Pacific flow, which will help make the weather quite pleasant.

If you’re wondering where our 2012 Winnipeg temperature summary is, don’t fret! We’ve just been a little busier than expected and are working hard to get it up in the next couple days! Until then, get out there and enjoy the break from the deep freeze.

Pleasant Weekend Ahead

We’ll break out of the deep freeze today as things finally warm up a bit as we head into a mostly snow-free, pleasant weekend.

850mb Temperatures

850mb temperatures for this evening from the GEM-REG model. It’s clearly evident that a substantial area of warm air has pushed northwards over Southern Manitoba.

Yesterday’s 1-3cm of snow that fell across the city marked a shift in the long-wave pattern over the Prairies as the flow shifted from a west to northwest flow to a more southwesterly flow. This has allowed warmer air to flood over Southern Manitoba aloft, and as winds pick up this afternoon, we’ll get a chance to mix it down to the surface.

There will be a slight chance of flurries through the day today, but if they happen they’ll be quite light and very scattered about. Winds will pick up midday to around 20-30km/h, which will help mix down warmer air aloft and warm our temperatures up to around -6°C.

Skies will remain mainly cloudy tonight, and temperatures will remain steady near -6 or -7°C.

Winds will remain out of the south or southwest for most of the day tomorrow, keeping our temperatures around -6°C yet again. By late in the afternoon or tomorrow evening, the winds will shift around slightly to the northwest, which will allow our temperatures to drop to a low of -15°C overnight. We’ll be far from a deep freeze, though, as Sunday looks to bring sunshine back to Southern Manitoba as we climb to a daytime high around a more seasonal -10°C.