2019 in Review: A Look Back at Drought across the United States in 10 Maps
January 7, 2020
2019 USDM Weekly Maps
This animation displays the weekly drought maps published by the US Drought Monitor (USDM) during 2019.
2019 Most Intense Drought
This map displays the most intense weekly USDM classification for locations across the United States, regardless of when the designation occurred.
2019 Weeks in Drought
This map shows the number of weeks, throughout the year, a location experienced drought, defined as USDM category “D1 – Moderate Drought” or greater, across the United States.
2019 Cumulative Drought Index
This map combines the intensity and duration of drought, tabulated over the course of the year. It is calculated by multiplying the USDM category (D1=1, D2=2, D3=3, & D4=4) by the number of weeks designated in that category. 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). The maximum value possible is 208 (52x4).
2019 USDM 1 Year Change Map
This map displays 1 Year USDM Category Change for 2019.The map compares December 31, 2019 to January 1, 2019.
2019 USDA Drought Designated Counties Map
This map displays the designated drought counties by USDA for 2019.
12-Month SPI Map
This map displays the 12-Month Standardized Precipitation Index values from January 1, 2019 to December 31, 2019 for the contiguous United States. Map was generated at the High Plain Regional Climate Center (HPRCC).
Annual Departure from Normal Precipitation Map
This map displays the annual departure from normal precipitation for the United States. Map was generated at the National Weather Service (NWS) Advanced Hydrological Prediction Service (AHPS).
2019 Palmer Drought Severity Index, January - November 2019
This animation displays the monthly Palmer Drought Severity Index from January - November 2019, published by NOAA's National Centers for Environmental Information.