National Integrated Drought Information System (NIDIS), United States Geological Survey (USGS), United States Department of Agriculture (USDA), National Oceanic and Atmospheric Administration (NOAA)
The research-based website NationalSoilMoisture.com provides high-resolution gridded soil moisture products derived from in situ soil moisture measurements, Natural Resources Conservation Service SSURGO soil characteristics, and PRISM data. The project combines data from multiple federal, regional, and state agencies to create comprehensive data products for the United States, including Alaska, Hawaii, and Puerto Rico. These products include near real-time soil moisture percentiles derived from in situ data, modeled NLDAS data, and the NASA’s Soil Moisture Active Passive (SMAP) satellite, as well as a near real-time blended product.
This project is a joint effort between the National Integrated Drought Information System (NIDIS), the United States Geological Survey (USGS) Center for Integrated Data Analytics (CIDA), the United States Department of Agriculture (USDA), and the National Oceanic and Atmospheric Administration (NOAA). It is one of the key exploratory research projects under the National Coordinated Soil Moisture Monitoring Network.
What can I do with these data?
- Check current and past soil moisture percentiles and soil temperature back to 2018. Both station based and interpolated datasets are available.
How do I use the site?
- Web Maps: navigate to the “Maps” tab and select a current conditions data product that you would like to be visualized. An interactive map will generate and allow you to zoom in/out, pan, and select specific data points for more information.
- Other Resources: more information about the project, team, data inputs, methodology, data access, and related research are available in the tabs at the top of the website.
Data Directory: Access point for data product directories providing download links. Interpolated data products (in GeoTIFF format) are available upon request using the contact email provided on the main page.
RK 20 cm Soil Moisture Percentile: This high-resolution gridded soil moisture map shows soil moisture percentiles at 20 cm depth, derived from merging in situ soil moisture data from a wide range of state and federal mesonets across the continental U.S. and interpolating these data into a 4 km grid via Regression Kriging (RK). Data are updated daily with a 1-day delay due to differences in network report timing.
5 cm All Blend: This 5 cm All Blend is computed using a simple average to combine 5 cm interpolated in situ volumetric water content (VWC) percentiles, NLDAS Noah 0-10 cm VWC percentiles, and Soil Moisture Active Passive (SMAP) L3 enhanced VWC percentiles (~5 cm). To match the NLDAS output time step, the All Blend is generated at a 5-day latency.