Friday, July 10th 2020, 7:50 pm - As the weekend nears, storm risk subsides somewhat for Saturday, but Sunday into Monday looks more unsettled.
The Prairies region's stormiest days are behind it, at least for now, with some relatively scattered non-severe risk for Saturday in Manitoba and northern Alberta -- the latter province even gets a day of rosy warmth. Beyond, however, an upper-level trough and associated surface low-pressure system will track into the Rockies, making for an unsettled second half of the weekend -- complete with another dash of mountain snow. For a closer look, see below.
- Alberta sees some warmth Saturday, but cools down again soon after
- Unsettled pattern on the weekend, with more rain for parts of Alberta Sunday into Monday
- Cold air mass to bring a dusting of snow to the Rocky Mountain peaks
- Keep an eye on weather ALERTS in your area
Visit our Complete Guide to Summer 2020 for an in-depth look at the Summer Forecast, tips to plan for it and much more
SATURDAY: BRIEF WARMTH IN ALBERTA, STORM RISK LINGERS
A past week's storm potential will linger somewhat into Saturday, though weakened from its peak.
Forecasters are looking at two risk zones: Northern Alberta, driven by a surface low, and a slice of Manitoba, which will be affected by the same low that brought the risk to Saskatchewan Friday.
However, any storms that do spark up are expected to be non-severe, with generally very little storm energy to work with. Any such storms will be marked by heavy local downpours and small hail.
Temperature-wise, Albertans look to bask in more seasonal warmth than they've been used to the past few weeks, as daytime highs climb to the upper-20s in the south, with Medicine Hat eyeing the 30-degree mark. Saskatchewan sees a similar bump in temperatures, while Manitoba remains nearly unchanged.
SUNDAY AND BEYOND: COOLER TEMPS, UNSETTLED CONDITIONS -- AND A CHANCE FOR SOME MOUNTAIN SNOW
Beginning Sunday, an upper-level trough and associated surface low-pressure system will track east of the Rockies Sunday, bringing widespread rainfall across the northern Prairies, thunderstorm threat across the southern Prairies -- and the return of snowfall to the Rocky Mountain peaks.
That widespread rainfall will further dampen an already soaked northern Alberta and Saskatchewan Sunday and Monday. In fact, areas that have already received 100-200 per cent of their normal rainfall in the last 30 days will pick up around 20-40 mm more.
Further south, the threat for severe thunderstorms will target both provinces as a hot air mass from the High Plains of the U.S. clashes with a cooler air mass arriving from the Pacific.
As that cooler air settles over western Canada, freezing levels across the B.C./Alberta border are forecast to drop to ~2500 m -- low enough to dust the Rocky Mountain peaks with snow Sunday into Monday morning, for a second time this month.
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Check back for updates as the forecast evolves.