Flood Warnings and Advisories

CENTRAL
Flood Watch – South Thompson (UPGRADED)

High Streamflow Advisory – North Thompson River (MAINTAINED), Thompson River (MAINTAINED), South Thompson (MAINTAINED)
ISSUED: 12:30 PM June 26th, 2020

The River Forecast Centre is upgrading to a Flood Watch for:

  • South Thompson River

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

  • North Thompson River including Blue River, Clearwater River and surrounding tributaries
  • Thompson River at Kamloops and downstream to Spences Bridge
  • Tributaries of the South Thompson including Shuswap River, Shuswap Lake, Adams River

Moderate rainfall impacted the region on Tuesday and Wednesday, with 5-30 mm of precipitation observed through the North Thompson River watershed, and 3-10 mm over areas in the South Thompson. River levels in tributaries of the North Thompson River rose rapidly in response to this rainfall and to on-going high elevation snowmelt, including areas around Blue River and Clearwater.
Current observations as of Friday, June 26 at 11:00 PDT:

  • North Thompson River at Birch Island (08LB047) peaked late on Thursday at 834 m/s (5-year flow) and is beginning to recede
  • North Thompson River at McLure (08LB064) appears to be peaking at 2140 m3/s (5-year flow)
  • Clearwater River near Clearwater Station (08LA001) peaked early on Thursday at 1260 m3/s (10-year flow).  The river is currently flowing at 1220 m3/s
  • South Thompson at Chase (08LE031) is flowing at 1300 m3/s (10-year flow) and rising
  • Thompson River near Spences Bridge (08LF051) is flowing at 3270 m3/s (between a 5-year and 10-year flow)

Rising flows from the South Thompson River the North Thompson are increasing water levels on the Thompson River at Kamloops and downstream. The Thompson River at Kamloops has reached the highest levels of the year.  The Thompson River at Spences Bridge is expected to continue to increase over the next few days and forecast to reach a 10-year flow early next week.  Additional precipitation over the next few days could increase flows slightly higher than the current forecast.

The public is advised to stay clear of the fast-flowing rivers and potentially unstable riverbanks during the high-streamflow period.

The River Forecast Centre continues to monitor the situation and provides updates as conditions warrant.

Contact for Media Relations, Ministry of Forests, Lands, Natural Resource Operations and Rural Development:
Tel: 250-213-8172

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. This is the lowest level.
  2. Flood Watch: River levels are rising and will approach or may exceed bankfull. Flooding of areas adjacent to affected rivers may occur. This is the intermediate level.
  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. This is the highest level.

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