Map of the United States divided into regions showing percentage change on heavy precipitation between 1958 and 2016

The map shows percent increases in the amount of precipitation falling in daily events that exceed the 99th percentile of all non-zero precipitation days (top 1 percent of all daily precipitation events) from 1958 to 2016 for each region of the United States. The number in each black circle is the percent change over the entire period (1958–2016).

The changes are calculated from the beginning and end points of the trends for 1958 to 2016. Figure source: CICS-NC/NOAA NCEI.
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Last modified
15 February 2019 - 3:28pm