More than 2.5 inches fell at Reagan National Airport, and more than 3 inches at Dulles International Airport. Baltimore also had more than three inches. All of the figures set records for the date.
Some parts of the area were under flood warnings. Where no warnings were issued, the jurisdictions were under flood watches. High water was reported on roads in northwestern Fairfax County, and in upper Montgomery County.
Small streams rose toward flood stage.
With the ground already saturated, the National Weather Service warned at 9 p.m. that “it will not take much runoff to produce additional flooding tonight.”