Convective Discussion
Isolated thunderstorms along a frontal band which extends from James Bay to Labrador.
Technical Discussion
Surface ridge over the Gulf of St. Lawrence and Newfoundland will prevail today. A surface low over NY state is pushing moisture over NB and western NS, however with no trigger to speak of and limited daytime surface heating, instability will be limited to elevated Cu, isolated TCU and even some ACC. The Caribou and Yarmouth soundings show potential instability but a warm nose at 750mb and cloud cover prevent any surface development.
A frontal feature tied to a surface low near James Bay and very strong dynamics aloft, continue to produce organized clusters of thunderstorms again this morning. An area of high precipitable water (30+mm) stretches from the low into Labrador and is indicative of potential brief heavy showers. Storm motion is eastward under a 100 knot slightly anti-cyclonic upper jet. This core of this feature will drift eastward during the next 24 hours or so bringing a risk of thunderstorms to central and western Labrador.
Regional Impacts.
NB, PEI, NS and Newfoundland: none
Labrador: Isolated thunderstorms producing brief heavier showers and 60km/h wind gusts over central and west portions.
Couturier