An area of low pressure will move into the Mid-Atlantic Region late Monday into Monday night. This will set the stage for locally heavy rainfall that may lead to flash flooding across portions of the Piedmont and Shenandoah Valley. Many of these areas have already seen their share of rain over the past several days and weeks. Any additional rain over fairly saturated ground will likely cause flooding, especially across low-lying and poor drainage areas.
The heaviest rain will likely fall from the Charlottesville and Staunton area and points north, but MAINLY WEST of Interstate 95. This would mean LOWER amounts for Fredericksburg and Washington, D.C. However, isolated instances of flash flooding remain possible even in these areas, due to fairly saturated ground.
Rain will develop across the Shenandoah Valley and Piedmont late morning Monday and spread into the Central and Northern Valley by afternoon. Heavy rain could result in flash flooding from 4:00 p.m. through 10:00 p.m.