U.S. Drought Monitor Change Map
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 using a five-category system, from Abnormally Dry (D0) conditions to Exceptional Drought (D4)..
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. The USDM offers Drought Change Maps at weekly, monthly, and annual timescales.
Drought Change Since Last Week
3-Category Degradation
Drought/dryness has worsened by 3 categories, according to the U.S. Drought Monitor.
2-Category Degradation
Drought/dryness has worsened by 2 categories, according to the U.S. Drought Monitor.
1-Category Degradation
Drought/dryness has worsened by 1 category, according to the U.S. Drought Monitor.
No Change
There has been no change in drought conditions at this location.
1-Category Improvement
Drought/dryness has improved by 1 category, according to the U.S. Drought Monitor.
2-Category Improvement
Drought/dryness has improved by 2 categories, according to the U.S. Drought Monitor.
3-Category Improvement
Drought/dryness has improved by 3 categories, according to the U.S. Drought Monitor.
Current weekly U.S. Drought Monitor (USDM) data are compared with the previous week to identify changes.
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)
Access
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.
