Regional Impacts
Southern Grand Banks may see some elevated thundershowers today and overnight. No other regional impacts are expected.
Convective Discussion
An upper-level low is slowly tracking over the southern marine district and will stall over the Grand Banks today and tomorrow. Most convection associated with the low is now south of the Maritimes marine waters, however, a strong southerly push over the eastern Grand Banks and upper level jet over the area will help lift. The highest risk for embedded convection will be in the overnight hours into Friday morning, when cloud top cooling will also help to enhance the destabilisation aloft.
Thunderstorm Outlook for Day 1
Thunderstorm Outlook for Day 2
A large trough will approach Atlantic Canada from central/northern Quebec on Friday and a secondary trough further south over southern Quebec. At this time, the dynamics appear more favourable further west over Quebec as the air aloft over New Brunswick remains too warm and would need a good amount of surface based heating in order to break the cap. Showers are expected to move into western New Brunswick in the mid afternoon so cloudiness out ahead in the morning could be key factor for anything getting going other than showers. Low risk has been added for now.
