Flood Warnings and Advisories

Flood Warning –Salmon River
Flood Watch – Okanagan (DOWNGRADED), Central Interior, Similkameen
UPDATED: 1145h May 11th, 2018

The following Flood Warnings, Watches and Advisories in the Central region are in effect as of Friday, May 11th 1145hr:

  • Flood Warning – Salmon River near Falkland and Salmon River near Salmon Arm
  • Flood Watch (DOWNGRADED) – Okanagan including Mission Creek and tributaries in the Vernon, Kelowna, Penticton, Oliver and surrounding areas
  • Flood Watch – Similkameen River and tributaries including the Tulameen River
  • Flood Watch – Central Interior including the Nicola River, Coldwater River, Bonaparte River, Guichon Creek and tributaries in the Merritt, Kamloops, Cache Creek and surrounding areas

Rainfall on Wednesday and Thursday has led to extreme flows across the region. River levels have peaked from this rainfall, and levels have been slowly receding Friday morning.
A summary of key rivers includes:

  • Mission Creek near East Kelowna (08NM116) is flowing at approximately 55 m3/s and is now receding. Peak flows reached approximately 120 m3/s late on Wednesday (100-year flow)
  • Salmon River near Salmon Arm (08LE021) is flowing at 67 m3/s (100-year flow) and slowly easing 
  • Nicola River near Spences Bridge (08LG006) is flowing at approximately 280 m3/s and has experienced a significant drop over the past day from a peak of 380 m3/s
  • Similkameen River near Hedley (08NL038) is flowing at approximately 440 m3/s and has dropped significantly over the past day from a peak of 620 m3/s

High pressure is expected to dominate over the province over the weekend and into next week. Temperatures are expected to begin to rise on Friday, entering a prolonged period of well above normal temperatures. In the Okanagan, temperatures are expected to reach the upper 20 degree range. Snowmelt rates are expected to rise, and watersheds with extensive snow pack will increase again early next week.

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