Environment Canada has issued a rainfall warning for the Terra Nova area, Gander, Bonavista and Clarenville.
Heavy rainfall is expected in these areas today and tonight before tapering off on Friday.
"This is a warning that significant rainfall is occurring in these regions. Monitor weather conditions, listen for updated statements," Environment Canada states in its latest warning.
It says a broad area of low pressure south of Newfoundland will remain nearly stationary until eventually moving away to the east on Friday. This will result in a moist onshore flow over the northeast coast. Rain is expected become heavier through the day today. Heavy rain will persist through tonight before tapering off to light rain or drizzle on Friday.
For Gander and Bonavista north, an additional 40 to 60 millimetres are expected before the rain tapers off Friday. For Terra Nova, the Bonavista Peninsula and Clarenville, an additional 50 to 80 millimetres of rain is expected.
A special weather statement is also in effect for:
• St. John's and vicinity;
• Avalon Peninsula North;
• Bay of Exploits;
• Green Bay - White Bay;
• Grand Falls-Windsor and vicinity.
Environment Canada says significant rainfall is expected in these areas through to Friday.
It says the lengthy duration of rainfall will produce significant rainfall amounts, with up to 45 millimetres expected by Friday night.
There is some uncertainty as to exactly where the heaviest rain will
fall today and tonight. The public is advised to monitor future forecasts as warnings may need to be extended.
Environment Canada's website is www.weatheroffice.gc.ca.