Baseline (1961-1990) average total precipitation (inches) for Alaska and Western Canada. This zip file contains three GeoTIFF rasters. The file names identifies whether a file represents an annual mean or a seasonal mean (i.e., summer or winter). Summer is defined as June - August; winter is defined as December - February. Baseline data are derived from Climate Research Unit (CRU) TS 3.1.01 data. CRU data courtesy of Scenarios Network for Alaska and Arctic Planning.