Current Water Supply Conditions and Outlook
February 1, 2016
Last week more wet weather systems moved through western Washington and 3.31 inches and 4.45 inches of precipitation were recorded in our Cedar River and South Fork Tolt River watersheds, respectively. Snow continues to build in our mountain watersheds and accumulations are close to the long term average for this time of the year.
Chester Morse Lake at the Overflow Dike is at elevation 1556.3 feet, about 2.9 feet higher than last week, and about 4.5 feet above its long term average (based on the years 1989 to 2005). Masonry Pool Reservoir at Masonry Dam is at elevation 1556.2 feet, about 3.3 feet higher than last week, and about 9.5 feet above its long term average. The South Fork Tolt Reservoir at the South Fork Tolt Dam is at elevation 1760.7 feet, about 4.3 feet higher than last week, and about 6.1 feet above its long term average. Water releases from reservoir storage are actively being managed for water supply, hydropower, fish habitat and flood management objectives for both the Cedar and South Fork Tolt Rivers.
Water consumption for the previous seven days averaged approximately 103 mgd. That is more than the 101 mgd consumed during the same period last year, and less than the average of 113 mgd used during the same period over the years 1999-2008.