Community Notice – High Streamflow Advisory

The River Forecast Centre has issued a High Streamflow Advisory for the following regions:

  • Howe Sound (Sea to Sky Corridor)
  • Sunshine Coast
  • North Shore Mountains
  • Metro Vancouver
  • Fraser Valley including the Chilliwack River and surrounding tributaries
  • West Vancouver Island
  • East Vancouver Island
  • South Vancouver Island
  • Central Vancouver Island


Most recent weather model results forecast precipitation totals of 40 to 80 mm for the Sunshine Coast and Howe Sound, 40 to 80 mm for Metro Vancouver, and 100 to 150 mm for the North Shore Mountains. Vancouver Island could experience relatively high rainfall, with coastal sections reaching 100 to 150 mm total and 30 to 75 mm over central and eastern portions of the island. Precipitation occurring next week will likely fall as snow in the mountains.

The public is advised to:     

  • Stay clear of the fast-flowing rivers and potentially unstable riverbanks.  
  • Stay informed of current  advisories, road closures, and evacuation alerts for your area. 
  • Support for Members
  • River Forecast Centre - Advisory Definitions

Assistance is available for Members both on- and off-reserve who have been affected by extreme weather events (flooding, landslides, or power outage.)    

Please contact David Harrison, Manager, Emergency Planning & Response: 

Phone: 604-374-2687 
Email: emergencyresponse@squamish.net

High Streamflow Advisory means that river levels are rising or expected to rise rapidly, but that no major flooding is expected. Minor flooding in low-lying areas is possible.

Flood Watch means that river levels are rising and will approach or may exceed bankfull. Flooding of areas adjacent to affected rivers may occur.

Flood Warning means that river levels have exceeded bankfull or will exceed bankfull imminently, and that flooding of areas adjacent to the rivers affected will result.