Beginning this morning, an intense low pressure system will move into Newfoundland causing the barometric pressure to drop over 40 mb in a 24 hour period. Some areas around the low could hear thunder-rolls as the system moves in.
This system will bring heavy rain to northeastern Newfoundland with 40 - 60 mm of rain possible for the Bonavista, St. John's, Trepassey area. Some areas could see a rain/snow mix as temperatures in the morning and overnight hover near freezing. The western part of the island will be drier with the possibility of sunny breaks during the day.
The wind is the real concern with this low pressure system. Sustained winds of 80 km/h with gusts of up to 140 km/h are possible for northeastern Newfoundland. Waves could reach heights of up to 8 m overnight.
For the rest of Atlantic Canada, PEI and Cape Breton will experience some sea effect rain in the afternoon. New Brunswick will be partly cloudy but windy.
The low pressure system will move out of the area Wednesday overnight. Thursday will be a fairly nice day across Atlantic Canada but another two storms are set to hit the area for the weekend.