Regional Impacts
Today
NB…Embedded thunderstorms bringing heavy downpours.
NS/PEI/NL…None
Tonight
NB/NS/PEI…Embedded thunderstorms bringing heavy downpours.
NL/LAB: None.
Saturday
NS: Embedded thunderstorms bringing heavy downpours.
NB/PEI/NL/LAB: None.
Convective Discussion
Post-Tropical Cyclone Debby is interacting with an upper trough over central Ontario, helping to advect moisture into southern Quebec, New England and into the Maritimes today then towards Newfoundland into Saturday. The axis of heaviest moisture with embedded thunderstorms this morning has been over the St. Lawrence River towards eastern Ontario and south into New York State and along the southern coast of Maine. These areas are expected to move across northwestern New Brunswick and the Gulf of St. Lawrence overnight and into the Bay of Fundy. Pockets of heavy rain should then pull eastward into southern New Brunswick, PEI, NS and Newfoundland on Saturday with a trailing cold front. There may be embedded convection with this rain, enhancing rainfall amounts as precipitable water of 50 to 60 mm moves through the region but with a quite warm 500mb level as well, convection may end up capped. Regardless, heavy downpours are expected.
Thunderstorm Outlook for Today
Thunderstorm Outlook for Tonight
Thunderstorm Outlook for Saturday
Roberta McArthur