Convective Discussion.
A frontal wave over southern Quebec will reach the Maritimes tonight. Ahead of this feature, an area of showers currently over the lower St Lawrence will reach northwestern NB this afternoon. This morning’s soundings from the area are showing limited potential energy so any daytime thunderstorms activity will be limited to Maine and Quebec.
This evening and overnight the air mass will become much more humid and unstable as a trough pushes through. Some residual convective features from the west will also spread across the Maritimes, especially across western NS where downpours are likely.
Regional Impacts.
Newfoundland: none.
Labrador: Scattered showers only.
Nova Scotia: Dry today, Numerous thundershowers tonight with downpours likely over western sections.
New Brunswick: Scattered showers in the northwest today, risk of thundershowers across the province tonight.
Prince Edward Island: Dry today, risk of thundershowers tonight.
Jean-Marc