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An official website of the United States government

Site Section
Data & Maps

USDM Change Maps

Associated Agencies

National Drought Mitigation Center (NDMC), National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Agriculture (USDA)

The U.S. Drought Monitor (USDM) is a map that is updated each Thursday to show the location and intensity of drought across the country. Along with these weekly maps, the USDM provides weekly Drought Change Map that displays changes in drought class degradation and drought class improvements across the United States. USDM offers Drought Change Maps at weekly, monthly and annual timescales.  

How to

How to use this site:

  • Use the drop down menus to select a date, scale, and time frame to view a series of change maps for a selected week.
  • Change maps are available at the follow scales: 1 week, 4 week (1 month), 8 week (2 month), 12 week (3 month), 24 week (4 month), or 52 week (1 year)


US Drought Monitor Change Maps: view and compare drought change maps at the: 1 week, 4 week (1 month), 8 week (2 month), 12 week (3 month), 24 week (4 month), or 52 week (1 year) timescales.   

Representative Image
Example USDM Change Map