NOAA National Weather Service's Climate Prediction Center (CPC), National Environmental Modeling and Analysis Center (NEMAC)
Individuals, businesses, and communities of all sizes can use the Climate Explorer to understand how climate conditions in their locations are projected to change over coming decades. This information—derived from global climate models—can help people assess potential exposure, vulnerability, and risk to their assets.
Built to accompany the U.S. Climate Resilience Toolkit, the Climate Explorer offers graphs and maps of observed and projected temperature, precipitation, and related climate variables for every county in the contiguous United States. Additionally, the tool now offers hindcasts and projections for Alaskan boroughs.
The tool also displays historical observations of temperature, precipitation, and related variables from 1950 to 2013 for the contiguous United States. Observations are averages calculated from quality-checked ground-based weather stations across the country. Users can compare graphs of observed conditions to climate model simulations (hindcasts, or projections generated for the past) for the same period. Comparing the range of observations to the simulations can provide insights on the models' collective ability to predict the future for the given variable in a given county. For temperature-related variables, the range of observations are generally within the envelope of simulations (hindcasts). For some variables—especially precipitation-related variables—comparing observations with hindcasts reveals limitations of the models.