Severe thunderstorms possible late Friday with intermittent rain over the weekend

CTV News

4 hours ago

Patchy fog developed over portions of Calgary and southern Alberta early Friday, at times limiting visibility to less than one kilometre near Medicine Hat.
In Calgary, the fog was mostly in low-lying areas and started to mix out by 7:30 a.m.
Severe thunderstorms possible late Friday with intermittent rain over the weekend
Foggy view from CTV Calgary at 7:15 a.m. July 18, 2025.
The first part of Friday will be mild in Calgary with a mix of sun and cloud and minimal winds, but a low pressure system situated in the B.C. interior will move over the Rockies later in the day and introduce some instability.
Rain will first show up along the foothills Friday afternoon, with thunderstorms popping up in the early evening west of the QEII and Highway 2.
Calgary is likely to sit right in the pathway of this trough, meaning rain is likely later Friday and carry through overnight, with the potential of some severe thunderstorms development across the region.
The greatest threats associated with Friday's thunderstorms include heavy rain, large-sized hail and strong winds.
Scattered showers and thunderstorms will likely be a part of the weather story for most of the next few days, especially at the start of next week when persistent rain is expected.
Severe thunderstorms possible late Friday with intermittent rain over the weekend
Due to the counter-clockwise rotation around this initial low rainfall totals will be variable as it pushes back up against the eastern side of the Rockies.
Calgary could see close to 20 millimetres of rain by Monday morning.
Daytime highs will sit close to 20 C from Friday through Sunday, before dropping down to just 14 C on Tuesday.
Severe thunderstorms possible late Friday with intermittent rain over the weekend
There will be a return to a more stable weather pattern by the middle of next week and bring sunshine and highs in the mid to high 20s for Calgary.