Annual Maximum Snow Water Equivalent: All Scenarios

<hr /> <p> <span><strong>Deprecation Warning</strong>: On June 1 2026, this item will no longer be available. </span> For more information on transitioing layers visit: <a target='_blank' href='https://gis-kingcounty.opendata.arcgis.com/pages/inspect-gis-data-1' rel='nofollow ugc noopener noreferrer'>Update Deprecated Items | King County GIS Open Data</a> </p> <hr /><p> Historical and projected changes in the Annual Maximum Snow Water Equivalent (SWE), a measure of the total amount of water contained in the snowpack. Results are shown only for watersheds with an average historical April 1st SWE of at least 0.4 inch. April 1st is the approximate current timing of peak annual snowpack in the mountains of the Northwest. Geographic units: HUC10. <br /></p><p>These data include historical conditions (1970-1999, in inches) and the projected changes (in percent) for ten global models. Two time periods are considered: the 2040s (2030-2059) and the 2080s (2070-2099), based on a moderate greenhouse gas scenario (A1B).<br /></p><p>Data source: Hamlet et al. 2013.</p>