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The center of tropical depression Florence passes west of Washington today, and will spend a weekend and an evening in the region across the region. Rainfall may be locally heavy and sufficient to cause flooding.
Due to the rotating atmosphere associated with the remains of Florence, we can not rule out a brief or two tornadoes in thunderstorms that develop this afternoon. Any tornado activity would be isolated, but watch out, especially between 15 and 18 hours.
At about 1:30 pm Jeff Halverson, Weather Weather Expert at Capital Weather Gang, said he was increasingly "concerned" about the tornado potential. Severe thunderstorms have already caused tornado warnings south and west of Richmond.
Although the risk of storms and floods is highest in our western regions, predictions from radar and computer models suggest that strong storms will also affect some of our eastern regions.
The National Meteorological Service has expanded a the initial flash flood survey for the district and western areas to include areas east of Interstate 95.
"Average rainfall of 1 to 2 inches is expected, with locally higher amounts," said the Weather Service flood statement. "Due to the wet summer, this amount of rain can cause a rapid rise in water in streams and streams as well as in urban areas, especially if several heavy showers pass through the same area. "
Forecast precipitation through tonight HRRR model. (PivotalWeather.com)
If it's raining a lot, avoid roads near streams and streams, which could quickly surpass their shores. Never try to cross a flooded road in your vehicle – make a U-turn.
Short-range computer models and radars suggest that the heaviest precipitation will arrive early this afternoon. By the end of the afternoon, the area of solid rainfall probably shifted to the northeast, but scattered showers and storms can trail behind it, containing brief showers. After sunset, some showers and storms may persist during the night hours, but they should be a failure.
However, another wave of showers and storms could occur Tuesday afternoon and evening with abundant rains locally, which could produce more pockets of flooding.
Risk of river flood
Heavy precipitation in the mountains to the west (about 2 to 4 inches) and rainfall in the immediate area will increase river levels along the Potomac and Shenandoah rivers.
"[T]The latest guidelines of the model suggest that nearly a dozen prediction points on the main water courses of the Shenandoah and Potomac basins could be flooded in the coming days, "wrote the national meteorological service serving the region.
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