Flood Watch – Englishman River, Little Qualicum River
High Streamflow Advisory – South Coast and Vancouver Island (MAINTAINED)
ISSUED: 3:45 PM January 3, 2019
The River Forecast Centre is issuing a Flood Watch for:
- Englishman River
- Little Qualicum River
The River Forecast Centre is maintaining or adding a High Streamflow Advisory for the South Coast and Vancouver Island including:
- Central Vancouver Island (ADDED) – including Sproat River, Somass River, Port Alberni and surrounding areas
- East Vancouver Island (ADDED) – including Parksville, Qualicum and surrounding areas
- South Vancouver Island (ADDED) – including the Chemainus River, Koksilah River, Cowichan River and surrounding areas
- Howe Sound – including the Stawamus River and tributaries along the Sea-to-Sky Highway
- Sunshine Coast – including watersheds around Gibsons and Sechelt
- North Shore – including the Seymour River and watersheds around North Vancouver and West Vancouver
- Fraser Valley – including the Chilliwack River, and mountainous tributaries on the north side of the Fraser Valley
- West Vancouver Island – including tributaries around Tofino, Bamfield, Port Renfrew and surrounding areas
An intense Pacific frontal system has stalled over south-west British Columbia, bringing heavy rainfall across the region. Rainfall amounts exceeding 150mm have been observed since yesterday on West Vancouver Island, and 60-100+ mm in Central Vancouver Island, Eastern Vancouver Island, Howe Sound and Lower Mainland.
Streamflow has been rising rapidly in response to this rainfall, with areas on Vancouver Island currently reaching or exceeding 2-year return period flows. The Little Qualicum River near Qualicum Beach (Water Survey of Canada gauge 08HB029) is currently flowing at approximately 210 m3/s (20-year flow).
Additional rises are possible later on Wednesday. For larger and lake-influenced systems, including the Cowichan River and Somass River, rises are expected into Thursday.
The River Forecast Centre will continue to monitor conditions and update this advisory as conditions warrant.
A High Streamflow Advisory means that river levels are rising or expected to rise rapidly, but that no major flooding is expected. Minor flooding in low-lying areas is possible.
A Flood Watch means that river levels are rising and will approach or may exceed bankfull. Flooding of areas adjacent to affected rivers may occur.
A Flood Warning means that river levels have exceeded bankfull or will exceed bankfull imminently, and that flooding of areas adjacent to the rivers affected will result.