Flood Warnings and Advisories

High Streamflow Advisory – Lillooet River, Bella Coola River
UPDATE: 0900h May 22nd, 2018

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

  • Bella Coola River
  • Lillooet River

Warm temperatures have led to increased snowmelt runoff in the Coast Mountains. River levels have remained high due to this runoff. Temperatures are expected to remain well above seasonal on Tuesday and Wednesday. Flows on the Bella Coola River and Lillooet River are expected to see additional rises into the middle of the week. On the Bella Coola River above Hammer Creek (Water Survey of Canada gauge 08FB011), flows may reach up to the 400-420 m3/s range (approximately 2-year flow). On the Lillooet River at Pemberton (08MG005), flows are expected to fluctuate in the 360-460 m3/s range (below a 2-year flow).

Easing temperatures into Thursday and Friday are expected to lead to declining river levels into the weekend.

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

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.


  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
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