Maps show heavy downpours near tornadoes

Rainfall maps show the heaviest rainfall Friday was concentrated right where you might expect -- around the worst of the tornadoes that struck.

An area between Fallston and Loch Raven reservoir received as much as four inches of rain, as did the area near Damascus, where the borders of Frederick, Montgomery, Howard and Carroll counties meet. Those areas were the sites of two of the most damaging tornadoes, of at least nine that struck over a few hours.

Heavy rain also stretched across east-central Baltimore County in the Parkville area, into Towson and Mount Washington and up toward Lancaster, Pa. One weather spotter near Loch Raven reported 4.56 inches of rain to CoCoRaHS, a network of amateur precipitation counters.

As seems to be the case often this spring, heavy rainfall across the state doesn't necessarily translate to major gains in the official rain tally at BWI Marshall Airport. The airport, which was also the site of a confirmed tornado, received 1.55 inches of rain. That has the rain total up by 1.18 inches for the month, while it's still 5.25 inches behind for the year. (That deficit has narrowed from about 6 inches.)

Normal rainfall in June is 4.07 inches, slightly more than in May, a month BWI just finished 2 inches behind normal.

The most precipitation seen at BWI on June 1 was 3.18 inches in 1987.

Have a weather question? E-mail me at or tweet to @MdWeather.

Copyright © 2018, The Baltimore Sun, a Baltimore Sun Media Group publication | Place an Ad