The current Arizona Snow - Precipitation Report is available at:
ftp://ftp.wcc.nrcs.usda.gov/data/snow/update/az.txt
For the Upper Salt River, the Hannagan, Baldy and Maverick Fork sites are the most pertinent (also, the snow water equivalent is more pertinent than the precipitation data).
Based on my research we're still one or two major storms away from a legitimate Salt River season. Keep your fingers crossed and pray for snow.