Convective discussion
Basically there is a risk of non-severe thundershowers for the western Maritimes. Currently there is a nearly stationary low near James Bay with a frontal trough extending from it southeast over Maine. This trough is nearly stationary with little dynamic upper support. There is also very little moisture west of the main feature. There is some weak detstabilisation in the mid levels, with a 500 mb thermal trough well east of the 700 mb trough thisch continues down to 850 mb. There is also some moisture near and below 850, with a moist tongue over northern Maine extending toward Northwest New Brunswick, and mid level clouds are moving away to the east. If and when the stratus breaks up there may be enough heating to produce some thundershowers.
In the Gulf of Maine a nearly stationary broad weak low is triggering some embedded which moving towards southwestern Nova Scotia. There cellc should not go much east of the tri-county area.
For Thursday, indications are for a slow progression into Labrador and across the western Maritimes.
Regional Impacts
Nova Scotia: Slight risk for this afternoon into this evening and overnight for non-severe thundershowers.
New Brunswick: Slight risk for evening and overnight for non-severe thundershowers.
Newfoundland, Labrador, and Prince Edward Island: None for today and tonight. Overnight into early Thursday morning there is a slight risk for western Labrador.
Doug Mercer