Volume inflow forecasts for the Okanagan system are 127-129% of average and are significantly higher than the overall Okanagan snow basin index.
In contrast, runoff forecasts for the Similkameen River (at Hedley) are at 89-90%, below the snow basin index of 119%.
Typically, 100% of the annual BC snow pack has accumulated by early May as the provincial
snow pack normally peaks in mid-April. Lower elevation snow sites usually start to melt
prior to May 1, while high elevation snow stations can continue to accumulate snow in May
depending on weather conditions.
Warm weather forecasted for this weekend (May 9-10) is expected to initiate high elevation melt, but it is not expected to substantially increase flows in most rivers. Seasonal temperatures the following week should keep most rivers fairly level.