Parts of Vancouver Island including Greater Victoria are being urged to stay alert this weekend as unusually high tides and a storm system increase the risk of coastal flooding.
A coastal flooding statement issued by Environment Canada warns that the combination of abnormal high tides and falling atmospheric pressure could lead to minor to moderate flooding with the highest risk expected on Sunday.
The weather statement is in effect for sections of the island’s east coast including the corridor from Royston to Lantzville and Parksville, but forecasters say the same factors will influence coastlines around much of Vancouver Island.
According to the weather agency, the timing is notable as the south coast enters a period of high astronomical tides while the Earth reaches perihelion its closest point to the Sun.
At the same time a low pressure system is forecast to cross the region.
As atmospheric pressure drops, sea levels can rise above predicted tide heights increasing the potential for water to spill onto shorelines when winds and waves are added to the mix.
While the exact track and strength of the low pressure centre remains uncertain, Environment Canada says wind conditions will depend heavily on where the system moves.
Even moderate winds combined with storm surge can result in debris being pushed ashore along with accelerated erosion in vulnerable areas.
Along exposed coastlines, minor to moderate flooding is considered likely—particularly in low lying locations. Officials warn that roads, coastal walkways and beach access points may become difficult or unsafe to navigate as water and debris are washed inland.
In Greater Victoria, residents along the waterfront are being advised to exercise caution even though the capital region is not specifically named in the statement.
Areas such as Dallas Road, Clover Point, Cadboro Bay and other exposed stretches of shoreline could experience elevated water levels rough seas and wave spray during peak tides through the weekend.
Environment Canada is encouraging residents to stay back from the water, avoid storm watching and continue monitoring updated forecasts and alerts as conditions may change quickly.
