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Previous Severe WX Forecasting outlooks and advisories are archived here for reference.
02 Sep 2026 - ON
KEY POINTSConditions across Southern Ontario are becoming increasingly favourable for a brief but severe thunderstorm event this afternoon and evening. Storms are expected to develop late in the day, with the greatest risk between 5:00 PM and 9:00 PM EDT.Once storms develop, they may intensify quickly, producing strong wind gusts, heavy rainfall, small hail, and isolated funnel clouds. The highest severe potential is expected within the red risk area.Monitor local weather conditions and official alerts through the evening, as storms may develop and strengthen quickly.IMPACTSPrimary — Damaging wind gusts, heavy rainfall, small hail, isolated funnel cloudsSecondary — Reduced visibility in heavier rainfall and brief periods of gusty windsCONFIDENCEHigh — Storm development and rapid intensification appear likely
02 Sep 2026 - AB
KEY POINTSA low-pressure system moving north out of Montana on the evening of September 2 will bring the potential for a brief period of severe thunderstorms across Alberta's southern border region.As the system lifts farther north, a lower-end severe risk may extend toward the Calgary region through the evening hours. The greatest concern remains focused closer to the southern border.The low is expected to linger over southern Alberta into the early hours of September 5, keeping the region unsettled. SWX will continue monitoring the potential for an additional thunderstorm risk on the evening of September 4, along with developing snow at higher elevations.IMPACTSPrimary – Damaging wind gusts, heavy rainfall and small hail.Secondary – Periods of heavy rain and isolated thunderstorms, with a low probability of additional hail development.CONFIDENCEHigh - Southern Alberta near the Montana border, where the greatest severe potential is expected.Medium-Low – Orange-shaded areas farther north, where storm coverage may be more isolated and the severe risk is less certain.
30 Aug 2026 - SK
Key PointsA low-pressure system moving in from the Dakotas later this afternoon will bring an increased risk of severe thunderstorms to southeastern Saskatchewan.The system is expected to track north toward the Regina–Saskatoon corridor by evening and remain in the region for approximately 24 hours.Thunderstorms will be possible throughout this period, with the greatest severe-weather potential focused across southeastern Saskatchewan later this afternoon.
23 Aug 2026 - AB
Timing
Starting mid-afternoon, thunderstorm development is expected along the foothills, with activity spreading across the region through midnight.Key Points
An area of low pressure will move through Central and Southern Alberta today, bringing the potential for late-afternoon and evening thunderstorms. The overall hail threat should remain low, with a slight risk of small hail within the High Potential area.
Starting mid-afternoon, thunderstorm development is expected along the foothills, with activity spreading across the region through midnight.Key Points
An area of low pressure will move through Central and Southern Alberta today, bringing the potential for late-afternoon and evening thunderstorms. The overall hail threat should remain low, with a slight risk of small hail within the High Potential area.
10 AUG 2026
01-02 AUG 2026 - UPDATE
01-02 AUG 2026
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