Rainfall amounts ranged from 0.75-1.5” in northern Fairfax, Montgomery, and northern Prince George’s county. The heaviest rain fell in northern Anne Arundel county where 1.5-2.5” fell. The rain sharply cutoff southwest of the District with generally 0.1” or less.
BWI airport received 1.72” of rain, a new daily record. But at National Airport, just a trace fell. Dulles Airport fell right in the middle, receiving 0.65”.
Hail was reported over many of the regions that got heavy rain, with enough hail to cover the ground briefly in Fairfax, Wheaton-Glenmont, Beltsville, Laurel and Ashburn (later at night) according to reports. The stones were generally small - from pea to dime size, but there were isolated reports of quarter to golf ball sized hail around Glenmont and Laurel.
Hailstorm in Glenmont, Maryland. Submitted by @liss07 via Twitter.