Loudoun County

Flood Watch issued October 10 at 3:00PM EDT until October 12 at 2:00AM EDT by NWS Baltimore MD/Washington DC

Moderate to heavy rainfall is expected as the remnants of Isaias track across the region starting early Sunday morning. Storms should be highly efficient rainfall producers given the tropical nature of the air mass. In particular, the eastern slopes of the Blue Ridge have the potential to see the most rainfall given the continued easterly upslope winds. A further eastward expansion of these watches may be needed. * WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of central, northern, and northwest Virginia, including the following areas, in central Virginia, Albemarle, Central Virginia Blue Ridge, Greene, Nelson and Orange. In northern Virginia, Culpeper, Northern Fauquier and Southern Fauquier. In northwest Virginia, Madison, Northern Virginia Blue Ridge and Rappahannock. * WHEN...From late tonight through late Sunday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - The remnants of Isaias will bring a tropical air mass much into the Mid-Atlantic region late tonight into Sunday. Storms should be highly efficient in this environment and capable of producing several inches of rain throughout the duration of the event. Storm total rainfall is expected to be around 2 to 3 inches, with pockets of 3 to 5 inches along the eastern slopes of the Blue Ridge. - http://www.weather.gov/safety/flood