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Atlantic: Storm threat returns Thursday, Chantal slows over North Atlantic

Thursday, August 22nd 2019, 9:30 am - A thunderstorm threat returns to Atlantic Canada on Thursday with the risk for heavy rain, strong winds and small hail.

Showers and thunderstorms sweep back into Atlantic Canada through Thursday as a slow-moving system moves into the region. Local flooding is possible through the early morning hours on Thursday as the leading edge of the system creeps into New Brunswick and Nova Scotia. Further afield, Tropical Storm Chantal is swirling in the North Atlantic. We take a look at what you need to know for the tropical storm, and who can expect thunderstorms, below.


WEATHER HIGHLIGHTS:

  • Thunderstorm risk into Thursday, heavy rainfall possible
  • Tropical Storm Chantal well out to sea
  • Watching another potential tropical storm into long range
  • Stay up-to-date on the ALERTS in your area

WATCH BELOW: COLD FRONT TRIGGERS MORE STORMS ACROSS THE MARITIMES

After some nocturnal and early morning thunderstorms moved through parts of the Maritimes, a system tracking through the region will spread more rain and thunderstorms for some areas on Thursday.

"The risk for thunderstorms returns through the afternoon and early evening hours on Thursday as a cold front slices through a really hot and humid air mass, acting as the trigger mechanism for thunderstorm development," says Weather Network meteorologist Kelly Sonnenburg.

ATLRisk (1)

Heavy rain is expected to be the main hazard with these thunderstorms and isolated downpours could cause pooling water on roads or localized flooding in low-lying areas. The heaviest daytime rain looks to be over Cape Breton, P.E.I. and the southern shores of Newfoundland with the threat for strong winds and small hail on the table in western New Brunswick as well.

The unsettled weather will continue into Friday and through the start of the weekend for Newfoundland as a system slowly tracks in from Quebec and then eastward out to sea.

COOLER TEMPERATURES FLOOD IN FOR THE WEEKEND

Weather Network meteorologist Dr. Doug Gillham says that temperatures will be much cooler behind this system for the weekend and highs will struggle to reach the 20-degree mark.

"However, warmer weather is expected to return for the middle and end of next week and continue through the Labour Day long weekend," says Gillham.

ATLWeekend (1)

EYEING THE TROPICS

Chantal formed as a tropical storm on Tuesday and has since been downgraded as it continues to swirl well out-to-sea in the North Atlantic. As of Thursday morning it was drifting eastward about 1000 km south-southeast of Cape Race, Newfoundland. Given its location and its projected track -- further east and south -- it is unlikely to pose any risk to land with a "clockwise loop" expected through the weekend.

The last named storm in the Atlantic was Barry, which briefly became a hurricane before it made landfall in the United States on July 13.

WATCH BELOW: TROPICAL DEVELOPMENT IN NEXT 5 DAYS

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