Soil moisture measurements, along with groundwater monitoring, continue to be one of the biggest needs in drought monitoring (Svoboda et al., 2002a). Soil moisture is an important indicator of agricultural drought. In addition to the progress being made by implementing soil moisture probes in several statewide Mesonets, SCAN slowly continues to expand in its goal to provide a network of soil moisture monitoring sites for the United States. SCAN has approximately 100 sites in 38 states, with plans for expansion as funds become available. Soil moisture data would benefit the DM and many other products and serve as ground truth information for satellite remote sensing products. It would also benefit the initialization and verification of soil moisture models, such as the CPC soil moisture model used in the development of the DM.
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