MANITOBA: Thunderstorm Forecast for Sunday, June 4, 2023

SUNDAY AFTERNOON UPDATE: We have expanded the isolated severe threat to include most of Southern Manitoba. While these pop-up storms will be extremely localized, they could bring the potential for severe hail and funnel clouds.

Pop-up thunderstorms are possible in much of Central and Southeastern Manitoba on Sunday afternoon and evening. A few of these storms could become severe with large hail and damaging wind gusts. Funnel clouds and maybe even a landspout can’t be ruled out.

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.