The blow-by-blow of what to expect from Hurricane Fiona

Hurricane Fiona is on its way and much of Atlantic Canada can expect heavy rainfall, powerful winds, with storm surge likely along parts of the coast.

The storm is still expected to make landfall early Saturday as a hurricane-strength post-tropical storm. 

Power outages are very likely with sustained winds of 60 km/h expected across much of Nova Scotia, P.E.I. and into southeastern New Brunswick, with winds gusting over 100 km/h.

Areas of eastern Nova Scotia and P.E.I. are likely to experience the most severe winds with gusts of 120 to 140 km/h or higher looking possible, especially in exposed coastal areas. This will especially be problematic given the long duration of this event. 

With the trees in full leaf, gusts in the 70 to 100 km/h range are also likely to cause some power outages for areas further west.

The rain is already underway across the region as a cold front ahead of Fiona tracks through. Between the front and Fiona, totals of 100 to 150 millimetres of rainfall are expected along and west of the track. Local amounts could exceed that in tropical downpours and there's a high risk for flash flooding and washouts.

Fiona will bring pounding surf and large waves into eastern Nova Scotia on Friday night, then into the Gulf of St. Lawrence overnight and into Saturday.

The Canadian Hurricane Centre is warning of coastal flooding for Nova Scotia, P.E.I. and eastern New Brunswick as the combination of storm surge and large waves move onshore.

For most areas, the highest water levels will be Saturday morning near high tide.

So when does the storm arrive and when does it leave? Here's a breakdown of what to expect.

While New Brunswick will take a break from the rain on Friday, most of Nova Scotia and P.E.I. will see periods of rain as a cold front stalls across the eastern Maritimes.

The winds will remain relatively light, allowing for last-minute preparations. 

As we turn in for bed on Friday evening, Fiona will be approaching. Heavier rains will track in from the south and the winds will be increasing as well.

As we move into the overnight hours, expect the wind and rain to ramp up quickly. Areas closer to the storm track will really begin to feel the force of Fiona's winds.