Regional Impacts
Newfoundland: Isolated thundershowers this afternoon and evening. Potential severe thundershowers giving downpours, gusty winds and hail in the southwest early this afternoon.
Nova Scotia: Slight risk over Cape Breton
New Brunswick/PEI/Labrador: Nil.
Convective Discussion
A weak low pressure system will approach western Newfoundland this afternoon. ML cape values near 500 J/kg are expected and wind shear near 25 kts. This morning, convection developed over the Gulf of St. Lawrence near the Magdalen Island and then advected eastward. The earlier convection was mainly driven by upper level dynamics which weaken somewhat this afternoon as the jet slips south of Newfoundland. Dry mid layers will allow for gusty conditions. PWAT values will be near 25 mm so rainfall is a concern. Just a risk of embedded non-severe thunderstorms over the Maritimes on Thursday.
Thunderstorm Outlook for Day 1
Thunderstorm Outlook for Day 2
