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Percent of West in Summer Drought
The area of the western U.S. in moderately to extremely dry conditions during summer (June-July-August) varies greatly from year to year but shows a long-term increasing trend from 1900 to 2012. (Data from NOAA NCDC State of the Climate Drought analysis).
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Free to use with credit to the original figure source.
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Physical Climate, Observations, Extreme Events
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