We used two such datasets that meet these criteria:
one is the NOAA’s Climate Prediction Center
(CPC) daily U.S. unified precipitation datasets (Higgins
et al. 2000). The CPC daily unified precipitation dataset
(1948–2012) is a gauge-based, gridded, and qualitycontrolled
product derived from daily and hourly precipitation
measurements from over 13 000 (8000 before
1992) stations over CONUS with the same 0.258 spatial
resolution as the 3B42 and 3B42RT data