Regional Impacts
Today
NS/NB/PEI: Embedded thundershower risk giving heavy downpours.
NL/LAB: None.
Tonight
NB: Embedded thundershower risk giving heavy downpours.
NS/PEI/NL/LAB: None
Tomorrow
LAB: Risk of a thundershower over extreme southwestern sections.
NB/PEI/NS/NL: None
Convective Discussion
A low pressure system currently in southern Quebec will track slowly northeastward today to lie along the Lower North Shore of Quebec tomorrow. The warm front is tracking into the Maritimes today, bringing with it additional moisture with precipitable water above 50 and dewpoints near 20C. There are pockets of heavy rainfall expected along the warm front and in the warm sector today with a small risk of elevated embedded thundershowers. Destabilization is limited given the amount of cloud cover, but parts of southeastern NB, the valley in NS and PEI have some pockets of sunshine, and could breach the warm cap aloft. Otherwise, convection this morning has been mainly just ahead of the cold front with the thermal ridge in parts of New England and near the low centre. This is where the best dynamics are located and remain for today, but it is possible some residual convection will hold as the cold front approaches northwestern New Brunswick later this evening with heavy downpours as the main threat. The cold front is expected to weaken as it tracks across the Maritimes overnight but pockets of heavy rainfall are still possible.
For tomorrow, the low centre continues eastward along the Lower North Shore of Quebec or extreme southern Labrador with the cold front tracking across Newfoundland. Not expecting much convection will remain with the cold front, other than over the southeastern Maritime waters, but some convection may continue near the low centre.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
