In 2020, approximately four percent of the United States' land area recorded unusually high annual precipitation. The previous year had recorded the largest area affected in the indicated period, with roughly 12 percent of the country's land area registering much higher annual rainfall than expected based on historical data.
Share of land area with unusually high annual precipitation in the United States from 1990 to 2020
According to the source, the metric of an unusually high precipitation year is measured on the basis of the standardized precipitation index (SPI), which compares actual yearly precipitation totals with the range of precipitation totals that one would typically expect at a specific location, based on historical data. Unusually high precipitation is regarded as the share of land area which experienced a standardized precipitation index (SPI) value of 2.0 or above in a given year.
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OWID. (February 25, 2022). Share of land area with unusually high annual precipitation in the United States from 1990 to 2020 [Graph]. In Statista. Retrieved November 23, 2024, from https://www.statista.com/statistics/1293053/share-land-area-with-unusually-high-annual-precipitation-us/
OWID. "Share of land area with unusually high annual precipitation in the United States from 1990 to 2020." Chart. February 25, 2022. Statista. Accessed November 23, 2024. https://www.statista.com/statistics/1293053/share-land-area-with-unusually-high-annual-precipitation-us/
OWID. (2022). Share of land area with unusually high annual precipitation in the United States from 1990 to 2020. Statista. Statista Inc.. Accessed: November 23, 2024. https://www.statista.com/statistics/1293053/share-land-area-with-unusually-high-annual-precipitation-us/
OWID. "Share of Land Area with Unusually High Annual Precipitation in The United States from 1990 to 2020." Statista, Statista Inc., 25 Feb 2022, https://www.statista.com/statistics/1293053/share-land-area-with-unusually-high-annual-precipitation-us/
OWID, Share of land area with unusually high annual precipitation in the United States from 1990 to 2020 Statista, https://www.statista.com/statistics/1293053/share-land-area-with-unusually-high-annual-precipitation-us/ (last visited November 23, 2024)
Share of land area with unusually high annual precipitation in the United States from 1990 to 2020 [Graph], OWID, February 25, 2022. [Online]. Available: https://www.statista.com/statistics/1293053/share-land-area-with-unusually-high-annual-precipitation-us/
