FIGURE E6. Observed precipitation (upper left),
departure from average (upper right), percent of average (lower left),
and average precipitation (lower right). The units are given on each
panel. Base period for averages is 1981-2010. Results are based on
CPC’s U. S. daily precipitation analysis, which is available at
http://www.cpc.ncep.noaa.gov/products/precip/realtime/.