Up to 70 millimetres of rain can be expected in the Channel-Port Aux Basques region by tonight, prompting Environment Canada to issue a rainfall warning.
More than 50 millimetres of rain has already fallen in the Wreckhouse area, with more expected.
A low-pressure trough over the Gulf of St. Lawrence is expected to approach Newfoundland today.
Rain and showers are forecast for much of the province over the next few days, with regions of southern Newfoundland from the Burin Peninsula to Bay St. George, including the Humber Valley, Buchans and Green Bay expected to receive the heaviest amounts.
Currently the Port Aux Basques area is the only region with a rainfall warning in effect.
Also, for southeastern Labrador, for Eagle River, Cartwright to Black Tickle, Norman Bay to Lodge Bay, Red Bay to L’anse-au-Clair, potentially significant rainfall expected by Thursday evening.
Showers heavy at times with local rainfall amounts of between 20-40 millimetres.