The same cold front that produced several tornadoes and macrobursts over eastern Pennsylvania, southeastern New York, and Connecticut last week, proceeded to stall over the Mid-Atlantic States for several days. Some places received up to three months of rain in the span of a week. Leonardtown, Maryland, for example, received an eye-popping 8.94 inches of rain between May 12 and May 19. McLean, Virginia, came in not too far behind with 7.75 inches of rain in that span.
The rain set records at Washington, D.C.’s Reagan National Airport. Between May 12 and May 19, the site measured 6.14 inches of rainfall. At least 0.40 inches fell on each of the eight days, marking the first time that so much rain had fallen on eight consecutive days. The excessive rainfall likely contributed to the development of a sinkhole on the lawn of the White House as well as flash flooding in Frederick, Maryland.