Alberta: Thunderstorm Forecast for Sunday, June 11, 2023

Scattered thunderstorms are expected to impact much of Southern and Central Alberta on Sunday during the afternoon and evening. Current indications suggest that the environment could be favourable for some isolated severe storms in the Calgary to Edmonton corridor. Any storms that develop in this area have the potential to produce large hail, damaging wind gusts and heavy rainfall. There could also be the chance for a few funnel clouds which in rare cases, can touch down and become a landspout tornado.

Landspout: A landspout is a type of tornado that forms under a weak thunderstorm. Unlike traditional tornadoes, which develop from supercell thunderstorms and are associated with a rotating updraft called a mesocyclone, landspouts form from non-supercell storms and do not have a mesocyclone. These tornadoes are generally weaker and shorter-lived than their supercell counterparts but can still pose a threat to property and life, with wind speeds occasionally reaching up to 160 km/h.