Regional Impacts
Today
LAB: Risk of a thundershower over extreme southwestern sections.
NB/PEI/NS/NL: None
Tonight
None
Tomorrow
NL: Slight risk of a thundershower.
NB/PEI/NS/LAB : None
Convective Discussion
A low pressure system across the Lower North Shore of Quebec will track eastward today weaken tonight as it moves southeastward into Newfoundland tomorrow. A cold front associated with the low is tracking east of Cape Breton and across Newfoundland today. There has not been much convection along the front, but there is a chance for some embedded downpours, mainly across the Maritime waters. Otherwise, the other risk will be near the vicinity of the low centre in southwestern Labrador. With MLCAPE potentially reaching 500 J/kg, effective shear near 20kt and precipitable water of 35 mm, heavy downpours are likely. For tomorrow, there may be a very weak threat of a thundershower remaining near the low centre in central/eastern Newfoundland given sufficient lift can breach the warm 700-500mb levels, but with minimal shear and still relatively high moisture, some brief heavy downpours are possible in TCUs. Meanwhile, hot and increasingly humid conditions under a ridge of high pressure will settle over the Maritimes towards the end of the week.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Tomorrow
