Andrew Hedrick is a Post-Doctoral Research Hydrologist at the USDA-ARS Northwest Watershed Research Center in Boise, Idaho. Since 2014, he and his colleagues have been developing new physics-based modeling tools for real-time estimation of snow water content over many of the large watersheds of the Southern Sierra Nevada. These tools make use of ground-based measurements, atmospheric weather predictions, and data collected by airborne and satellite platforms to explicitly solve the energy balance of the snowpack at each hour of the day and over every square foot of these vital natural water towers.