An incoming atmospheric river has prompted a high streamflow advisory on B.C.’s South Coast.
The approaching storm is expected to drench the region this weekend, beginning Friday, and the River Forecast Centre cautioned there could be rapid streamflow rises in some areas.
Environment Canada issued rainfall warnings for the west coast of Vancouver Island and the Qualicum Beach area Friday morning.
Pooling water on roads is also possible, particularly “at lower elevations and in areas with poor drainage,” according to the advisory.
“Fast-flowing rivers pose increased risk to life safety, and the public is urged to be cautious,” it reads.
Significant flooding is not expected, but the Ministry of Water, Land and Resource Stewardship said the River Forecast Centre will be monitoring conditions throughout the weekend, and will issue a flood watch or flood warning if necessary.
A flood watch indicates river levels are expected to “approach” or “exceed” bankfull, which could cause flooding in nearby areas. A flood warning indicates that flooding is imminent.
Officials said the storm is expected to last 24 to 36 hours, delivering up to 200 mm to the South Coast mountains and western Vancouver Island.
On the mainland, the advisory applies to Metro Vancouver, the Fraser Valley, Howe Sound, the Sea to Sky region and the Sunshine Coast.
It also applies to rivers around the island communities of Tofino, Ucluelet, Port Renfrew, Duncan and Chemainus.
