NOAA - Sunny Day Flooding Totals For 2018 Around Chesapeake Bay: DC - 22 Days; Baltimore - 12 Days
A new National Oceanic and Atmospheric Administration report, shows that rising seas are inducing a particular type of increased flooding around the country. The phenomenon, known as high-tide or “sunny day” flooding because of the absence of rainfall as a trigger, struck a median of five days last year at nearly 100 coastal locations, tying the record set in 2015. The “median” is the level at which there are as many occurrences below the value as above it.
The problem was worse in the Northeast, which includes the Chesapeake watershed. The report, released on July 10, showed this region with a median of 10 days of high-tide flooding. The following Chesapeake-area cities carved out new records:
Washington, DC, 22 days
Lewisetta, VA, 15 days
Annapolis, MD, 12 days
Baltimore, 12 days
Overall, a dozen locations nationwide broke or tied their high-tide flooding records, NOAA said.
Don’t expect to dry out anytime soon. This year is projected to be another higher-than-normal year for 40 locations around the U.S. as a minor El Nino, the periodic phenomenon that brings more rain to much of the United States, lingers into early next year, researchers said. The national median frequency of high-tide flooding is expected to be twice as high as it was in 2000.
EDIT
https://www.bayjournal.com/article/report_sunny_day_floods_a_rising_threat_in_chesapeake_region