Above: depicted above is a possible scenario where storms initiate near Winnipeg and quickly move east into the Whiteshell and northwestern Ontario. Storm clusters and merger into a line of storms is expected to limit the tornado threat, but large hail and damaging winds may cause substantial damage across areas along the Trans-Canada Highway from Winnipeg to Kenora this evening into the overnight hours.
Area(s): Southern into central Manitoba
Timing: Wednesday afternoon and evening
Threats: Southeast: Torrential rainfall with local accumulations of 50-100 mm, hail 3 to 5 cm, and winds gusts of 100 km/h or higher. Elsewhere: Hail 2 to 4 cm and wind gusts of 90 km/h.
A slow moving cold front will trigger thunderstorms in the afternoon over a very humid southeastern Manitoba. There is the threat of large hail and damaging wind gusts early in storm development, but as thunderstorms grow more widespread threats will shift more towards damaging wind gusts and torrential rainfall. Local rain amounts well in excess of 50 mm are possible in southeast Manitoba. Elsewhere over southern and central Manitoba, isolated thunderstorms may develop behind the front; while generally non-severe, a few strong thunderstorms will be possible.