This website provides scientifically based estimates of future values for intensity–duration–frequency (IDF) curves for heavy precipitation events for locations in the United States. These future values incorporate changes due to potential global warming. Two greenhouse gas emissions scenarios are provided, RCP8.5 which is a high emissions scenario with large greenhouse gas increases through the 21st century and RCP4.5 which is a mid-range greenhouse gas emissions scenario where emissions increase to about 2050 then decline thereafter. These estimates were derived using NOAA Atlas 14 values as the basis and then making adjustments based on the scientific findings of this project. This website is the final deliverable for a research project funded by the Strategic Environmental Research and Development Program (SERDP/Department of Defense). The project final report and relevant journal articles are accessible under Downloads.

Photo by Dallas Krentzel. Licensed under CC BY 2.0.

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PRECIPITATION FREQUENCY ESTIMATES (in inches)
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DURATION AVERAGE RECURRENCE INTERVAL
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