Tuesday, August 19, 2025

Convective Outlook Valid for Today, Tonight and Tomorrow

Regional Impacts

Today:

NL: Risk of isolated embedded thundershowers over the eastern Avalon Peninsula and east coast.

NB/NS/PEI/LAB: No thunderstorms forecast.

Tonight:

No thunderstorms forecast.

Tomorrow:

No thunderstorms forecast.

Convective Discussion

Isolated embedded thundershowers affected parts of the Avalon and the northeast and east coasts of Newfoundland overnight and this morning as an upper low continues to slowly move east into the northern Grand Banks today. Showers and drizzle are expected to continue for most of Newfoundland in a strong northerly flow today with an odd thunderstorm still possible today mainly east of the Avalon. Otherwise, a ridge of high pressure will remain over the Maritimes this week limiting potential for convection. A weak trough over central Quebec will bring some isolated showers to parts of northern Labrador tomorrow, but are not expected to produce any thunderstorms at this time.

Thunderstorm Outlook for Today

Thunderstorm Outlook for Tonight

Thunderstorm Outlook for Tomorrow

 

Roberta McArthur

 

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