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WWHM4 has precipitation and evaporation data time series for all of the 48 contiguous states. Select your project location and WWHM4 will select the appropriate precipitation and evaporation data from its data base. You still have the option of using your own precipitation and evaporation data time series, if preferred.



 Still includes the WWHM3 precipitation and evaporation data for the 19 counties of Western Washington.