Annual water year precipitation for the six Southwest states
Annual water year (Oct-Sep) precipitation (inches/month) for the six states of the Southwest U.S., 1895/96-2010/11. Annual values in red, 10-year running means in blue. PRISM data from WestMap (DRI 2012).
Precipitation (inches / year)
Southwest, Observed, PRISM, Precipitation
Parameter-elevation Regressions on Independent Slopes Model