Alberta Thunderstorm Forecast

A risk of severe thunderstorms will develop across parts of eastern Alberta on Saturday. A significant shortwave trough pivoting about a Gulf of Alaska low will begin to dig into the Pacific Northwest, becoming increasingly negatively tilted over time, with an associated H5 speed max of 60-70 knots nosing into Alberta on Saturday. In response, an elongated, north to south-oriented surface low/trough will develop during the day from central sections into the far south. Low level moisture will be largely scoured out of southern and parts of central Alberta in low level westerly flow during the day on Friday, with the resultant moist axis residing from southcentral Saskatchewan into portions of eastcentral and northeastern Alberta by Saturday morning. As the surface trough begins to deepen during the day, low level moisture return will occur in earnest from Montana and into the warm sector across much of southeast and eastern Alberta. Meanwhile, an increasing southerly comp