This data package contains 30-minute soil volumetric water content (VWC) data collected at fifteen locations along 3 transects (5 locations per transect) in the Tromble Weir Watershed area of the Jornada Basin in southern New Mexico, USA. At each location, soil sensors measure VWC at three depths, 5, 15 and 30 cm, in units of cubic meters of water per cubic meter of soil. These measurements are used to help quantify the water balance across the small experimental watershed. Values have been used to investigate groundwater recharge, soil infiltration rates, and to evaluate the performance of hydrologic models. This is an ongoing dataset that will be updated annually.