https://www.psc.org/publications/fraser-panel-in-season-information/
Environmental Update
On August 16, the Fraser River water discharge at Hope was about 2 ,731cms, which is approximately 17%
lower than average for this date. The temperature of the Fraser River at Qualark on August 16 was 19.2oC,
which is 1.2oC above average for this date. DFO’s Environmental Watch program projects that river
temperature will increase to 19.5oC by August 22, while discharge is forecast to decrease to about 2,489cms over
the next 10 days. Sustained water temperatures in this range can cause severe stress to migrating sockeye and
may lead to significant en-route mortality. Prior to the season, the Fraser River Panel increased the lower river
escapement target for the Early Summer-run aggregate (which are the dominant group migrating up the Fraser
River at this time) by more than 20% to compensate for pre-season expectations of en route loss. If the current
pattern river temperatures continues, an increased fraction of the run may be required to compensate for
in-season expectations of en route loss. Migration conditions for Fraser sockeye will be monitored closely over the
next several weeks and if appropriate, additional management actions will be taken. To date fish condition
throughout the Fraser river has been good.