Northwest Avalanche Center (NWAC) and the University of Washington, with support from Tableau, released a new mountain snow depth tool in February. This new version is more interactive and easier to navigate. The snow depth values are updated twice a month beginning on November 15th through May 1. The monitoring sites are part of NWAC's mountain weather station network, some being owned by the DOT while others are partnerships between NWAC and ski areas or national parks.