Ministry of FLNRO

Flood Warnings and Advisories

UPDATE - High Streamflow Advisory: South Coast
ISSUED: February 16, 2017 3:30PM

The BC River Forecast Centre is maintaining a High Streamflow Advisory for:

  • Chilliwack River and tributaries

The BC River Forecast Centre is ending a High Streamflow Advisory for the South Coast including:

  • Howe Sound, including the Stawamus River and surrounding creeks
  • North Shore, including the Seymour River, Coquitlam River and surrounding creeks
  • Fraser Valley and surrounding creeks except the Chilliwack River
  • Sunshine Coast, including creeks in the Gibsons and Sechelt areas

A strong Pacific storm system has passed over south-west British Columbia over the past 2 days. Total rainfall amounts since Monday have ranged from 50-120 mm throughout the South Coast, with additional snow melt at lower elevations. Precipitation has eased since early Thursday morning.


River flows on Chilliwack River at Vedder Crossing (Water Survey of Canada gauge 08MH001) are approximately 410 m3/s, with small rises possible through the afternoon and early evening. Flow are expected to remain below 450 m3/s, and flows are expected to recede later on Thursday evening and through Friday.
Levels on other river systems in the area have passed peak levels, and are expected to decline through the rest of Thursday.


The public is cautioned to stay clear of rivers and riversides during the high streamflow period because the quickly flowing water and the adjacent riverbanks are potentially unsafe.


The River Forecast Centre will continue to monitor weather and streamflow and will provide updates as conditions warrant.

 

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