Saturday, July 11th 2020, 9:40 pm - Alberta's surge of warm temperatures proves to be short-lived, while regionwide, a trough looks set to bring still more rain.
Storm risk looks to be limited across the Prairies Sunday, with severe potential only expected in parts of Saskatchewan for a brief window in the afternoon. More widespread showers are expected across northern parts of the region, and Alberta's brief Saturday flirtation with seasonal summer warmth starts slipping once again. More details, below.
- Severe threat returning Sunday in Saskatchewan
- Trough moves through the region, bringing showers to northern areas
- Cooler temperatures return to Alberta beginning Sunday
- 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
SUNDAY AND BEYOND: MORE STORM RISK, UNSETTLED CONDITIONS
An upper-level trough and associated surface low-pressure system look to bring unsettled conditions for the second half of the weekend.
It will track east of the Rockies Sunday, bringing widespread rainfall across the northern Prairies, and its passage will be slowed by high pressure over Hudson Bay, boosting its eventual totals from Sunday into Monday.
As for thunderstorms, the potential will ramp up Sunday afternoon, with most of the severe risk centred in southern Saskatchewan. Any storms that do spark up will feature large hail, strong winds and heavy rain, further boosting rainfall totals in areas that receive showers.
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. Manitoba, which has seen its fair share of heavy rainfall lately, is also expected to receive a soaking Monday.
Temperaturewise, Alberta has largely missed out on true summer warmth so far this month, and though its daytime highs were largely in line with the rest of the region Saturday, Sunday sees something of a fall back to Earth, a little below seasonal. Calgary, for example looks to hover around the 20-degree mark for much of the next week, while areas north of it are likely to spend a bit of time in the mid-to-high teens.
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Check back for updates as the forecast evolves.