Air quality risks continue across southern Alberta

Fire weather warnings now extend for our American neighbours across Idaho and out to South Dakota. This is part and parcel to our upper-air pattern’s largely zonal flow (west-to-east-moving wind), pushing a wide array of features, including dry air and smoke, from the west coast across continental North America in the coming days. Because smoke is primarily guided along by wind at 500mb, or halfway along the atmosphere, the vast majority of the smoke moving east of the Rockies is "aloft" &