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

Flood Warnings and Advisories

Flood Warning – Slocan River (UPGRADED)
Flood Warning – Boundary
Flood Watch – Kootenay
UPDATED: 930h May 18th, 2018

The following Flood Warnings, Watches and Advisories in the South-East region are in effect as of Friday May 18, 930hr:

  • Flood Warning – Boundary, including the Kettle River, West Kettle River, Granby River and surrounding tributaries
  • Flood Warning – Slocan River (UPGRADED)
  • Flood Watch – West Kootenay, East Kootenay

Rain showers yesterday and overnight brought precipitation through the region, with rainfall amounts in the 5-20 mm range in the Boundary and Kootenay regions, with more localized amounts of 25mm around the Slocan. Rises are expected today and into Saturday in response to this rainfall. A summary of conditions and outlook includes:

  • Kettle River near Westbridge (08NN026) is flowing at 310 m3/s (5-year flow) and rising. Flows are expected to rise up to 400 m3/s range (approximately 20-40cm rise at the gauge) on Friday into Saturday
  • Granby River at Grand Forks (08NN002) is flowing at approximately 346 m3/s (10-year flow) and rising. Flows are expected to rise up to the 400-450 m3/s range (approximately 20-40cm rise at the gauge) on Friday into Saturday
  • Slocan River near Crescent Valley (08NJ013) is currently flowing at 620 m3/s (10-year to 20-year flow) and rising. Flows in the 700-750 m3/s range (30-40 cm rise above current levels) are expected Friday into Saturday
  • Salmo River near Salmo (08NE074) is currently flowing at 300 (2-year to 5-year flow) and rising. Flows up to 400 m3/s (10-15 cm rise above yesterday’s high water level, or 35-40 cm above current level at the gauge) are expected Friday and into Saturday
  • Kaslo Riverbelow Kemp Creek (08NH0050) is currently flowing at 110 m3/s and gauge height of 3.55m. There is limited rainfall gauges within the Kaslo River watershed, but adjacent areas received 10-25mm of rainfall. With this amount of rain in the Kaslo River, additional rises at the gauge of 20-30cm are possible (flows up to 130-140 m3/s) Friday into Saturday

Once runoff from rainfall has passed, cooler weather over the weekend should ease snowmelt rates, and rivers are expected to ease. Warmer weather forecast into next week could lead to on-going high flows next week.
The River Forecast Centre will continue to monitor conditions and update this advisory as conditions warrant.


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