Build yourself an ark: 3-5 inches of rain possible for D.C. area through Thursday

Rain is coming to the D.C. metro area, and lots of it.   The National Weather Service has declared a flash flood watch for the entire region Tuesday evening (10 p.m.) through late Wednesday night (6 a.m. Thursday morning). Computer model forecasts generally simulate 3-5 inches for the D.C. area between late this afternoon and Thursday afternoon, with the heaviest rain favored Tuesday late afternoon and night, and Wednesday late afternoon and evening.

“We are concerned about the potential rainfall amounts tonight through Wednesday,” writes the National Weather Service office in Sterling, Va. The rain is unlikely to fall continuously over this coming three-day period, but will come in waves. Nailing down the exact timing of these rainfall surges is close to impossible, but we tend to favor the afternoon and evening hours for the highest chance of heavy rainfall. Note there may well be windows when no rain falls or just widely scattered, intermittent showers.

http://www.washingtonpost.com/blogs/capital-weather-gang/wp/2014/04/28/build-yourself-an-ark-3-5-inches-of-rain-possible-for-d-c-area-through-thursday/