This project builds on work already completed that developed a watershed runoff model for the Long Island Sound Watershed, including the Connecticut, Thames, and Housatonic Rivers (Bjerklie and others, 2011), and a U.S. Geological Survey (USGS) New England Regional Precipitation Runoff Modeling System (PRMS) model developed as part of a USGS effort to build a continental-scale National Hydrology Model (Lauren Hay and Steve Markstrom, personal communication 2014). The models run in New Hampshire for current and future climate change scenarios give users an enhanced understanding of possible changes to streamflow, snowmelt, and groundwater recharge to be expected here as a result of climate change.