Flood Warnings and Advisories

High Streamflow Advisory – Fraser River
UPDATED: 09:30h May 22nd, 2018

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

  • Fraser River  including the mainstem from Lytton through Hope and the Fraser Valley

Persistent warmer than normal temperatures across British Columbia for the past three to four weeks has led to a much earlier than normal runoff period for the Fraser River. Hot temperatures and increased snow melt runoff last week worked its way into the Lower Fraser Valley over the weekend, with levels reaching approximately 11,000 m3/s at the Water Survey of Canada gauge at Hope (08MF005) and nearly 6.0 m at the Mission gauge (08MH024) .


Flows are expected to remain elevated through this week. With hot weather forecast over the headwater tributaries in the Upper Fraser and Thompson River basins, increased snowmelt runoff may lead to higher flows along the lower Fraser River into the coming weekend. Current modelling is indicating that flows should remain near current levels, however increases above current levels are possible.  


Complete 10-day Lower Fraser River Water Level Forecasting and results are available at: http://bcrfc.env.gov.bc.ca/freshet/lower_fraser/LFR-10-DayFloodLevelForecasts.pdf

The River Forecast Centre will continue to monitor conditions and update this advisory as conditions warrant.

Contact:
Media relations,
Ministry of Forests, Lands, Natural Resource Operations and Rural Development
Tel: 250 356-7506

Levels of Warnings/Advisories:

  1. High Streamflow Advisory: River levels are rising or expected to rise rapidly, but that no major flooding is expected. Minor flooding in low-lying areas is possible.
  2. Flood Watch: River levels are rising and will approach or may exceed bankfull. Flooding of areas adjacent to affected rivers may occur.
  3. Flood Warning: River levels have exceeded bankfull or will exceed bankfull imminently, and that flooding of areas adjacent to the rivers affected will result.

Links:

  1. Home of River Forecast Centre
  2. Current Streamflow Conditions and Flood Forecast Modeling
  3. Map of Current Streamflow Return Periods for All WSC Stations
  4. CLEVER Model 10-day Forecasts of Discharges and Return Periods
  5. COFFEE Model 5-day Forecasts of Discharges and Return Periods
  6. Back to page of Flood Warnings and Advisories