Flood Warnings and Advisories

High Streamflow Advisory – Vancouver Island
UPDATED: 11:20 AM November 27, 2018

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

  • West Vancouver Island – including tributaries around Gold River, Zeballos, Tofino and surrounding areas
  • Central Vancouver Island – including the Sproat and Somass Rivers and areas surrounding Port Alberni
  • East Vancouver Island – including tributaries around Campbell River, Courtenay, Parksville, Nanaimo and surrounding areas
  • Southern Vancouver Island – including the Cowichan River, Chemainus River and surrounding tributaries

A series of intense Pacific storms impacted the South Coast and Vancouver Island yesterday and overnight. Observed rainfall totals for this event, since Sunday afternoon, have been in the 150-300 mm range on the west side of Vancouver Island, and in the 70-150 mm range in other areas of the central, eastern and southern Vancouver Island.
Rivers have been responding to this rainfall, with peak levels being experienced in most rivers on Monday, or early on Tuesday. Some river systems, including the Chemainus River, Tofino Creek, and Little Qualicum River, reached up to 2-year return period flows. River levels in other areas generally remained below 2-year flow.
Precipitation is expected to continue through Tuesday, with significantly reduced rainfall rates that were observed on Monday. River levels in most areas are expected to remain elevated through Tuesday, however significant additional rises are not expected at this time.
The River Forecast Centre will continue to monitor conditions and update this advisory 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.
  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