Recent flooding in the Chehalis basin has led managers, residents, and others to begin evaluating options for managing flood risk in the future. Climate change is expected to both increase the risk of flooding and result in decreased summer low flows – with implications for human communities and ecosystems alike. This page summarizes the results of a study aimed at…

This dataset is a summary of the projected changes in average annual and seasonal temperature and precipitation from global climate model projections (GCMs) of 21st century climate change for the Pacific Northwest region. Data are derived from the two most recent Coupled Model Intercomparison Projects, Phase 3 (CMIP3¹, used in the 2007 IPCC report) and Phase 5 (CMIP5², used in…

This database includes weekly water temperatures under historical and future conditions for 124 stream temperature sites across Washington State. Projected changes in stream temperature are based on regression parameters estimated for each site that establishes a correlation between observed air and water temperature. Water temperatures were projected using the input from 10 climate models, under two emissions scenarios (A1B and…