NRCC (Northeast Regional Climate Center, Cornell University, Ithaca, NY; www.nrcc.cornell.edu) and PRISM (Parameter Regression on Independent Slopes Model) product summary [17].

1Geographical facets in PRISM represent combinations of slope, aspect and elevation generated by the PRISM system for regression modeling and interpolation. 2The North American Regional Reanalysis (NARR) is a 50 km resolution model output generated by a regional meteorological model that has been back-calibrated with observed satellite, radar and ground-based instrumental records [21]. 3NOAA Cooperative Observer Network (COOP) weather stations.