The latest hurricane track shows Arthur making landfall on Saturday as a tropical storm in southwestern Nova Scotia.
The first hurricane of the season is continuing to move north towards the Maritimes.
In a special weather statement, Environment Canada is warning Nova Scotians to be prepared for Arthur as it could pack winds over 100 km/hr.
Forecasters believe Nova Scotia may face the strongest winds, but New Brunswick and PEI may take the brunt of the rainfall, and amounts of 50 mm to 100 mm are expected in some areas.
How the storm interacts with a cold front, as well as the exact track will determine where the strongest winds and highest rainfall amounts will occur.
Right now, the forecast map shows a weakened Arthur making landfall as a tropical storm in Shelburne County before becoming extratropical as it moves across Nova Scotia.
There is still much uncertainty about the strength and track however.
This morning, Arthur was moving north along the southern U.S. coast at 15 km/hour and had maximum sustained winds of 120 km/hour.
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The storm is moving over warm waters and was continuing to intensify.
Forecasters say significant storm surge and waves are also possible with Arthur, especially for regions south and east of the storm track. Details about the exact location of where the biggest impact from surge and waves will occur will be clearer on Friday.
As of now, the Atlantic coast of Nova Scotia has a higher risk of surge and pounding surf in the region.
Mariners are also being advised to remain on alert and stay tuned for forecast updates.
The extended marine forecast is calling for easterly winds of 50 to 60 knots on Saturday morning, becoming northwest 45 to 55 in the afternoon off southwestern Nova Scotia.