This tool is an interactive map of the Chesapeake Bay watershed that provides gridded estimates of how projections of future extreme precipitation—the number of days each year with precipitation above a 1", 2" or 3" threshold—during 30-year periods (2006-2035, 2036-2065, 2066-2095) and under two future emissions scenarios, compare to a historic 30-year average (1976-2005).
Changes in Extreme Precipitation from 1976 to Present
This tool is excerpted from Chesapeake Bay Watershed Climate Impacts Summary and Outlook for 2018.
- The eastern half of the Chesapeake Bay Watershed has experienced increases in extreme precipitation from 2006-2017 compared to historical averages.
- We see greater changes in the number of extreme precipitation events when looking at larger events.
- Much of the eastern portion of the watershed has seen double the number of days with extreme precipitation over 3 inches. These are the largest daily events in our analysis.
- Decreases in extreme precipitation events over the western portion of the watershed could suggest drying or at least decreases in the magnitude and intensity of precipitation events.