Flood risk rises in Atlantic Canada as soggy system threatens 100+ mm of rain
This last weekend of April will be a very soggy one across Atlantic Canada as a moisture-laden system brings soaking rains--40-100+mm--through Sunday and Monday, increasing the chances of localized flooding
Relentless rain is rolling in for the final April weekend across Atlantic Canada, with some areas in line to see more than 100 mm of rainfall--elevating the risk of flooding for parts of the region.
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The Maritimes could see between 20-60 mm of rain, with the heaviest in the southern areas, but totals of 75-100+ mm are possible along the southern shores of Newfoundland.
A batch of rainfall warnings are in effect for parts of the Maritimes and Newfoundland. Similar storms in the past have caused the overflowing of creeks and rivers, and road shoulder erosion and washouts.
Localized flooding is likely with the heavier rain amounts, so you'll want to keep a close eye on any additional weather watches and warnings in your area as the rain picks up.
Rainy weather stalls over Atlantic Canada through the weekend and Monday
A strengthening storm will move across Atlantic Canada this weekend, bringing heavy rainfall to much of the East Coast.
Rain begins in northern New Brunswick, filling into the Bay of Fundy, P.E.I. and Nova Scotia by the evening hours. Heavy rain is expected to persist for the Bay of Fundy and across Nova Scotia through the overnight and into Sunday morning.
The heaviest rain pushes into western New Brunswick early Saturday evening, with the shorelines of the Bay of Fundy looking at rainfall rates as high as 10-15 mm an hour.
This band of active weather is expected to stall over the East Coast on Sunday and Monday, with all of the Atlantic provinces impacted by the rainy weather.
Models are suggesting that the shoreline of the Bay of Fundy may overachieve for rainfall accumulation, as well as the Burgeo shoreline in Newfoundland.
"Heavy downpours are likely to cause flash floods and water pooling on roads. Localized flooding in low-lying areas is possible. Don't approach washouts near rivers, creeks and culverts," said Environment and Climate Change Canada (ECCC) in the rainfall warning for Newfoundland's south coast.
Between 30-60 mm of rain is forecast, with parts of Newfoundland's Burgeo shores ranging from 75-100+ mm.
Localized flooding is possible, and travel may be impacted, so be sure to stay alert to the changing conditions. Heavy rainfall amounts like this could lead to water pooling on roadways.
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The last time Halifax Stanfield International Airport saw heavy rain was on Dec. 5, 2024, when it documented 34.3 mm of precipitation.
After a brief break, another system is expected to track across the region by midweek and another system is expected next weekend. Temperatures will be changeable, but overall near seasonal or slightly above seasonal as we get deeper into May.
Be sure to check back for the latest weather updates across Atlantic Canada.