Over the past 52 weeks, this location has spent 51–52 weeks in drought (D1–D4), according to the U.S. Over the past 52 weeks, this location has spent 41–50 weeks in drought (D1–D4), according to the U.S.
![drought map california drought map california](http://cbsnews1.cbsistatic.com/hub/i/2014/11/20/674723eb-5434-4fe3-982a-cce75103f43e/new-york-snow-2.jpg)
Over the past 52 weeks, this location has spent 31–40 weeks in drought (D1–D4), according to the U.S. Over the past 52 weeks, this location has spent 21–30 weeks in drought (D1–D4), according to the U.S. Over the past 52 weeks, this location has spent 11–20 weeks in drought (D1–D4), according to the U.S. Over the past 52 weeks, this location has spent 1–10 weeks in drought (D1–D4), according to the U.S. Over the past 52 weeks, this location has spent 0 weeks in drought (D1–D4), according to the U.S. The weekly maps are based on measurements of climatic, hydrologic and soil conditions as well as reported impacts and observations from more than 350 contributors around the U.S. The USDM is jointly produced by the National Oceanic and Atmospheric Administration (NOAA), the United States Department of Agriculture (USDA), and the National Drought Mitigation Center (NDMC). Gridded USDM Data – a gridded version of the US Drought Monitor (USDM), updated each Thursday in GeoTIFF format. The maximum value possible is 208 (52x4). For example, a location in D2 drought for 20 weeks and D1 drought for 5 weeks equals a cumulative intensity of 45 (20x2 plus 5x1). It is calculated by multiplying the USDM category (D0=0, D1=1, D2=2, D3=3, & D4=4) by the number of weeks designated in that category. Annual Cumulative Drought Index – combines the intensity and duration of drought, tabulated over the course of the year.Annual Weekly Count of USDM D2-D4 Drought – displays the number of weeks, throughout the year, a location experienced drought, defined as USDM category “D2 – Severe Drought” or greater, across the United States.Annual Weekly Count of USDM D1-D4 Drought – displays the number of weeks, throughout the year, a location experienced drought, defined as USDM category “D1 – Moderate Drought” or greater, across the United States.Annual Weekly Count of USDM D0-D4 Drought – displays the number of weeks, throughout the year, a location experienced drought, defined as USDM category “D0 – Abnormally Dry” or greater, across the United States.Annual Maximum USDM Drought – displays the most intense weekly USDM classification for locations across the United States, regardless of when the designation occurred.
![drought map california drought map california](https://www.watereducationcolorado.org/wp-content/uploads/2020/03/corivdroughtmexicomap_web.jpg)
drought from 2000 – 2019, from slightly different perspectives:
![drought map california drought map california](https://printablemapaz.com/wp-content/uploads/2019/07/climate-signals-map-us-drought-monitor-california-january-10-2017-california-drought-2017-map.png)
The USDM uses a five-category system, labeled Abnormally Dry or D0, (a precursor to drought, not actually drought), and Moderate (D1), Severe (D2), Extreme (D3) and Exceptional (D4) Drought. Drought Monitor (USDM) is a weekly map, released each Thursday, to show the location and intensity of drought across the country.