This note is an update on our earlier posting. The Mid-May Provincial Snow Bulletin has been released by the Provincial River Forecast Centre (click here to view). Based on the bulletin, snow-pack for the South Thompson River basin was 72% of normal as of May 15. The real-time snow pillow data reviewed today continues to show steady melting of the high elevation snow-pack.
The Forecast Centre continues to indicate that there is a low likelihood of flooding occurring in the southern interior (and in particular the South Thompson drainage) this spring from snowmelt. They further note that river levels in the South Thompson at Chase (and thus the level of Shuswap Lakes) are expected to peak in early June.
We have been monitoring the rise in the lake level and it continues to follow the trend of earlier postings. In the next 10 days the forecasted river levels indicate this trend will continue with the lake rising an additional 0.49 m (1.6 ft.). These levels are lower than observed in 2018.
We will continue to monitor the runoff forecasts and keep our members informed throughout the remainder of May and early June.