Flood Warnings and Advisories - River Forecast Centre - Province of British Columbia

Flood Warnings and Advisories

Flood Warning – Nazko – West Road River
Flood Watch – Central Interior
High Streamflow Advisory – BC Interior
ISSUED: 1630h May 3rd, 2018

River Forecast Centre is ISSUING a High Streamflow Advisory for:

  • Salmon River and tributaries around Prince George

The following Flood Warnings, Watches and Advisories are MAINTAINED as of Thursday 1600hr:

  • Flood Warning - Nazko River and West Road River
  • Flood Watch - Central Interior including the Bonaparte River, Baker Creek and tributary rivers around Cache Creek, Merritt, Williams Lake, Quesnel and surrounding areas
  • High Streamflow Advisory – South Interior, Boundary, Kootenay, Peace, Bulkley River

Snowmelt rates have been rising through this week in response to warming temperatures. High streamflow is being observed in many river systems fed by low-to-mid elevation terrain.
These areas include:

  • Okanagan - including tributaries in the Oliver, Osoyoos, Summerland, Penticton, Kelowna, Vernon and surrounding areas
  • Similkameen - including the Tulameen and tributaries
  • Boundary - including the West Kettle River, Kettle River, Granby River and surrounding tributaries
  • Kootenay - including the Moyie River and mid-elevation tributaries in the Castlegar, Trail, Salmo, Creston, Cranbrook and surrounding areas
  • Peace – including tributary rivers draining plateau areas around Fort St. John, Dawson Creek and surrounding areas
  • Bulkley – including Buck Creek and other areas around Houston and Smithers
  • Prince George area – including the Salmon River, Mud River, Chilako River and surrounding areas

In the Central Interior (Cariboo), very high flows have been observed. At the West Road River near Cinema (Water Survey of Canada gauge 08KG001), flows are estimated to be 460 m3/s (50-year flow) and down slightly from an estimated peak earlier this week over 550 m3/s (100-year flow). Baker Creek at Quesnel (WSC 08KE016) is flowing at approximately 70 m3/s (5-year flow). On the Bonaparte River below Cache Creek (WSC 08LF002), flows have been fluctuating around 60 m3/s (between a 10-year and 20-year flow).
Warmer temperatures are forecast for later this week, and will lead to another period of increased snow melt towards the end of the week and into the weekend. Streams that drain mid-elevation terrain (1000-1500m) that have experienced limited rises in the past 2 days may see modest rises into the weekend. In mid-to-upper elevation watersheds (>1500m) that have experienced modest rises over the past two days may see further rising with warmer weather into the weekend. Current forecasts are indicating that the warmest temperatures into the weekend are expected over the South Interior, south-east BC, and Peace region, and these areas will likely see the greatest snow melt rates and river rises over the next few days. Forecasting into next week is indicating the potential for warmer weather followed by rainfall. If this pattern is to develop, additional areas may experience flooding.
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