Tuesday, November 17, 2015

Major storm system to bring first wintery blast of season across southern and central MB Wednesday night into Thursday...

A pair of strong storm systems over North America will converge into a major storm system over the Manitoba/Ontario border late Wednesday, bringing the first onslaught of wintery weather to much of southern Manitoba Wednesday night into Thursday.  This will be the first real taste of winter for many in southern Manitoba after what has been an exceptionally mild fall to this point with little in the way of snow or cold weather.  Wednesday will start off cloudy and mild with periods of rain developing in the afternoon ahead of the converging storm systems. Things start to get interesting later Wednesday afternoon into Wednesday evening as the two storm systems begin to converge over NW Ontario producing an increasing NW flow of colder air across southern Manitoba. Rain will change to snow Wednesday evening as temperatures drop below the freezing mark, and continue through Wednesday night into Thursday morning. Strong northwest winds of 50-60 km/h with gusts of 70-90 km/h will produce locally poor visibilities in snow and blowing snow with local power outages possible due to the combination of ice buildup and strong winds. Snowfall amounts for Winnipeg and the RRV are expected to the in the 5 cm range with the bulk of snow falling across central and northern Manitoba, including the interlake and Whiteshell regions where locally heavier bands of lake effect snow are possible. As a result, expect a slower commute Thursday morning as drivers deal with the first snowfall of the season along with subfreezing temperatures and strong winds.
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4 comments:

  1. rob10:10 AM, November 21, 2015

    Clipper system will be tracking across central/northern MB on Sunday binging an area of snow ahead of it. Could see a dusting to 1 cm or so down here in Winnipeg, with bulk of snow through central/nrn MB from Lynn Lake through Norway House to east of Lake Winnipeg where 5 cm is possible. We will turn milder to the south of the low track, with temps back to freezing or even +1 or +2C for Sunday and Monday. A stronger system is forecast to track across the Dakotas midweek bringing an area of snow across southern Manitoba Wednesday, with perhaps 5cm for Winnipeg/RRV and brisk NE winds. This will be followed by clearing and colder weather for Thursday and Friday as arctic high pressure builds in, with temperatures below normal (minus teens). We gradually moderate over Grey Cup weekend as the arctic high moves off into the Ohio valley, but the moderating trend will be tempered by brisk southerly winds which will add to windchill concerns. At this point, Grey Cup looks dry (no snow expected) with temps near normal (normal hi -6C, low -14C) but brisk southerly winds giving cold windchill values for the game. Hopefully, moderating trend will move in quicker and winds won't be as strong so that game time conditions are more comfortable.

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  2. Don S10:19 AM, November 21, 2015

    Thanks for the update Rob.

    I sure would love to see more discussion between you and some of the other knowledgeable folks that used to occur in the past. I found it a great help in planning my work (snow clearing).

    Thanks again for the weather advice.

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    1. rob10:50 AM, November 21, 2015

      Don.. Yeah, discussion on this blog has really fallen off as more people use other forums and social media (such as Twitter) to discuss the weather (myself included). Admittedly, blog updates have become less frequent here, but I'll try to keep up on snowfall updates on this blog as much as I can as time permits.

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  3. Daryl10:35 AM, November 24, 2015

    I really miss it as well and have also heard from others who miss it. Thanks for the info you are able to give.

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