Abstract:
Satellite data provide synoptic, near-real time measurements of surface conditions. Previous studies have established significant relationships between climate variables and satellite-derived vegetation indices (such as the Normalized Difference Vegetation Index) over non-irrigated croplands and grasslands. In this project, we are researching methods for integrating information provided by
... satellite-derived measures of growing season vegetation performance and climate-based drought indicators to produce a timely and spatially-detailed drought monitoring product. Eventually, this information, coupled with map products of key drought indicators, will be available to many end users for making critical and timely decisions, from farm to regional scale.
This interactive map service provides regularly updated geospatial data related to drought conditions, including eMODIS VegDRI (each Monday at 12:30 pm), AVHRR VegDRI (every other Tuesday at 4 pm) 7-Day Average Streamflows (USGS Water Watch: daily), Precipitation Derivatives (NWS Precipitation Analysis: daily at 7 pm), and the weekly U.S. Drought Monitor (Thursday at 8:30 am).
{Summary provided by the U.S. Geological Survey.] 
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