The River Forecast Centre has issued a High Streamflow Advisory for the South Coast. The advisory includes Vancouver Island, Sunshine Coast, Howe Sound, and Lower Mainland including Metro Vancouver, North Shore Mountains, and Fraser Valley.
A strong storm system will have the potential to produce moderate to heavy rain across the region right into the middle of next week, with the rain heaviest on Monday and Tuesday. Cumulative rainfall amounts over the Sunday to Tuesday period could reach 150 mm or more on western portions of Vancouver Island and in the mountains, and the 20 to 60 mm range in other areas.
The storm marks a significant shift in the weather pattern and a change in drought conditions and Rivers are expected to rise rapidly in response to rainfall starting late Sunday into Monday, with peak flows occurring Monday through Wednesday, depending on rainfall timing and watershed size and response.
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Current river levels are extremely low in most areas, but the River Forecast Centre is asking people to be cautious near riverbanks, creeks, and fast-flowing bodies of water. Stay clear of fast-flowing rivers and potentially unstable riverbanks, and avoid recreational activities such as fishing, swimming, boating, or hiking near high streamflow rivers.