Flood Warnings and Advisories

Flood Warning – Boundary (UPGRADED) West Kootenay (MAINTAINED)
Flood Watch – East Kootenay (MAINTAINED)
ISSUED: 7:30 AM June 1, 2020

The River Forecast Centre is upgrading to, or maintaining, a Flood Warning for:

  • Boundary Region including the Kettle River, West Kettle River, Granby River and tributaries
  • West Kootenay including the Slocan River, Salmo River and surrounding tributaries

The River Forecast Centre is maintaining a Flood Watch for:

  • East Kootenay including the Moyie River and surrounding tributaries (UPGRADED)

The weekend experienced severe thundershowers and rain across the region. Rainfall amounts in the 10-50mm range have been observed since Saturday.
River levels have been rising rapidly in response to this rainfall. River levels in the 2-year to 20-year flow range are being observed throughout the region.
A summary of current conditions includes:

  • West Kettle River at Westbridge (Water Survey of Canada gauge 08NN006) is flowing at 150 m3/s and rising (5-year flow).
  • Kettle River neat Westbridge (08NN026) is flowing at 310 m3/s (5-year and 10-year flow) and rising. Flows are forecast to reach up to 380 m3/s (20-year flow) and peak later this afternoon or evening
  • Granby River at Grand Forks (08NN002) is flowing at 340 m3/s (5-year to 10-year flow) and rising. Flows are forecast to reach up to 420 m3/s (20-year flow) and peak later this afternoon or evening
  • Slocan River near Crescent City (08NJ013) is flowing at 600 m3/s (5-year to 10-year flow) and peaked last night. Flows are expected to decline through the day
  • Salmo River near Salmo (08NE074) is flowing at 370 m3/s (10-year flow) and rising. Flows peaked last night at approximately 450 m3/s (50-year flow)
  • Kalso River below Kemp Creek (08NH005) peaked yesterday and is now receding
  • Bull River near Wardner (08NG002) peaked yesterday and is now receding
  • Kootenay River at Fort Steele (08NG065) is flowing at 1280 m3/s (5-year to 10-year flow) and rising. Forecasts are indicating the potential to reach up to 1400-1800 m3/s today

 

The public is advised to stay clear of the fast-flowing rivers and potentially unstable riverbanks during the high-streamflow period.

The River Forecast Centre continues to monitor the situation and provides updates as conditions warrant.

Contact for 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. This is the lowest level.
  2. Flood Watch: River levels are rising and will approach or may exceed bankfull. Flooding of areas adjacent to affected rivers may occur. This is the intermediate level.
  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. This is the highest level.

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