High Stream Flow Advisory Issued by River Forecast Centre

BC Ministry of Agriculture, Food and Fisheries (MAFF) has provided industry with an update on current and anticipated weather events. The River Forecast Centre is issuing a High Streamflow Advisory for the South Coast including:

* Sea-to-Sky including areas around Squamish, Whistler and Pemberton
* Sunshine Coast
* Howe Sound
* North Shore Mountains
* Lower Mainland including areas along the Fraser Valley and areas around Hope

The River Forecast Centre is maintaining a Flood Warning for:

* Sumas River including Sumas Prairie and surround area

A prolonged period of active weather is expected throughout coastal BC over the coming week as several atmospheric rivers pass over the region. The first of these is expected to make landfall later on Wednesday (2021NOV24), starting on the North Coast and Central Coast, and sliding southward into Thursday (2021NOV25). This storm is expected to bring heavy rainfall, with rainfall totals in the 40-70mm range over the Fraser Valley and 50-80mm over the North Shore Mountains, and higher amounts possible over higher terrain. Subsequent atmospheric river events are forecast on the weekend, starting up again later on Saturday (2021NOV27).

Additional storms are expected early next week. There is still considerable uncertainty over the locations and severity rainfall of the weekend and next week storm cycles, however the pattern of extremely active weather and heavy rainfall is expected throughout the advisory region. Rivers are expected to see rises on Thursday (2021NOV25) in response to rainfall, with the potential for highest flows (2-year to 5-year) expected around the Sunshine Coast, Howe Sound and North Shore corridor. Rivers in the Fraser Valley are expected to see rises, though currently these are expected to be more typical in magnitude for fall storms, however these may be more problematic to flood response and recovery efforts and damaged infrastructure in the region

For more flood resources and updates, visit BC & Fraser Valley Flood Response or BCLNA's November 24th Flood Response E-news.
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