2017 Fraser River Freshet Information
Link to Provincial Forecasts: /main/link.cfm?id=1300
June 15, 2017 Update - The Fraser River at Mission gauge is at 5.27m today, a decrease from yesterday’s 5.35m, and well below the June 4, 2017 level of 5.65m.
The BC River Forecast Centre has ended the High Streamflow Advisory for the Fraser River (Fraser Canyon to Vancouver). River levels along the lower Fraser River peaked on Tuesday-Wednesday and are now receding. Flows are expected to continue to decline through the rest of the week. A return to high flows again this season is unlikely.
June 13, 2017 Update – The Fraser River at Mission gauge is at 5.19m today, an increase over yesterday’s 4.93m, and well below the June 4, 2017 level of 5.65m.
The BC River Forecast Centre is maintaining a High Streamflow Advisory for the Fraser River (Fraser Canyon to Vancouver). "Flows on the lower Fraser River have been rising over the past two days in response to heavy rainfall in the headwaters last weekend. Flows are expected continue to rise through Tuesday with peak flows at the Fraser at Hope late-Tuesday evening of approximately 9,400 m3/s, and peak levels at Mission on Wednesday of approximately 5.3-5.4 m. Once rivers reach peak levels, flows are expected to recede through the remainder of the week."
June 9, 2017 Update - The Fraser River at Mission gauge is at 5.2m today, a continued decline from the June 4, 2017 level of 5.65m. The BC River Forecast Centre is predicting these levels to continue to decline to under 5m at Mission in the next few days, followed by an increase to approximately 5.5m for June 14 & 15. The river level increase will be largely dependent on how much rain we receive over the entire river basin (e.g. upstream of Prince George and the Thompson River system). Updates will be provided through the week.
June 6, 2017 Update -The Fraser River at Mission gauge is at 5.5 m today, a slight decline from the 5.65m level this past weekend. The BC River Forecast Centre is predicting these levels to continue to decline to under 5m at Mission in the next 7 days, followed by an increase to over 6m at the Mission gauge for June 14. The river level increase will be largely dependent on how much rain we receive over the entire river basin. Updates will be provided through the week.
June 2, 2017 Update - The BC River Forecast Centre has updated the 10-day river forecast and is predicting the Fraser River at Chilliwack to reach peak water level on June 4, 2017 at just over 6m at the Mission station. The level is expected to recede slowly following this peak. These levels are below the level of 6.4m experienced in 2012.
May 31, 2017 Update - The BC River Forecast Centre is issuing a High Streamflow Advisory for the Fraser River (Fraser Canyon to Vancouver). Runoff from hot temperatures over the weekend and early this week are expected to lead to additional rapid rises along the lower Fraser River from Wednesday to Saturday of this week. Water levels at the Fraser River at Mission are forecasted to reach 5.9-6.05m over the Sunday to Tuesday period. These levels are below the level of 6.4m experienced in 2012. After reaching peak levels this weekend, flows are expected to recede slowly next week.
May 30, 2017 Update - The BC River Forecast Centre is predicting the discharge flow at the Fraser River Mission Station to reach approximately 11,500 cubic metres per second by June 5th 2017. /main/link.cfm?id=1300freshet/clever/08MH024.PDF This flow would equate to a level at the Mission station of approximately 5.8m, which is almost 1.5m above the long-term average for this time of year, but well below the 2012 level of 6.4m.
May 29, 2017 Update - The Fraser River at Carey point is experiencing flow beyond top of bank which has resulted in some water inundation to the adjacent fields.
Snowpack (June 1, 2017) - Extreme hot temperatures in the second half of May led to rapid snowmelt. Snow basin indices for June 1st 2017 range from a low of 7% of normal in the Stikine to a high of 228% of normal in the Okanagan. In general, snow basin indices remain elevated, particularly in the southern half of the province, with lower than normal indices in northern BC. In general rapid snow melt over the past few weeks led to declining snow basin index values since May 15th. This is a general indication that snowmelt has been more rapid than normal over the past few weeks, as would be expected given the extreme temperatures.
Outlook (June 1, 2017) - Larger rivers and rivers draining higher elevation terrain are at or near their peak from snowmelt-driven runoff. As a result, rivers are still very sensitive to additional runoff, particularly from rainfall. This includes Shuswap Lake and tributaries, South Thompson River, North Thompson River, Thompson River, Fraser River, and tributaries in the Kootenay and Columbia. Current rain forecast over the next week may lead to higher flows in these rivers than has been experienced so far this year.
June is typically the wettest month of the year for most of the BC Interior, with risks of extreme rainfall. Flood risks across the province from rain-driven runoff are expected to be on-going through June. Current advisories, warnings, freshet information, hydrometric monitoring, river modelling and snow data are available on the River Forecast Centre website: http://bcrfc.env.gov.bc.ca/.
We will continue to monitor snowpack conditions and will provide updated seasonal flood risk forecasts as they become available from the BC River Forecast Centre.