The National Weather Service Baltimore MD/Washington DC reports that Hurricane Helene, which struck the northeastern Gulf Coast overnight, is swiftly making its way through the southern Appalachians and Tennessee River Valley. With its rapid movement, the D.C. area braces for an onslaught of heavy rain and potential flooding, particularly in Central Virginia.
According to the National Weather Service area forecast discussion, Helene's remnants are expected to douse the region with 2-4 inches of rain, especially across the higher terrain. And while the Flood Watch stands for these locales, the urban centers could catch a break with lesser amounts expected. Yet having trudged northward into Georgia already, the hurricane's fingerprint is felt through blankets of cloud cover that are keeping temps in the 70s and a tangled dance with the winds, some gusting 20-30 mph in the metro areas.
In the wake of the storm's fast-paced journey, powerhouses of wind at higher altitudes have been clocked between 40 and 60 knots, particularly across central Virginia. Such gusts pose a risk, especially at higher elevations, and the waterlogged earth could see trees topple easier than a thought reconsidered. The easterly winds promise mischief well into the evening, leading to Small Craft Advisories across all local waters.
The possibility of severe weather this afternoon should not be overlooked. There's a Marginal Risk for tornadoes within the volatile cocktail of instability, wind shear, and helicity mixing in central Virginia, per predictions stated by the National Weather Service. While Helene is supposed to tether itself mostly to the southwest, it's not winding down its disruptive potential as the D.C. Southwest Waterfront and Annapolis remain on edge with Coastal Flood Watches for the dart of moderate tidal flooding come Saturday morning.
Looking ahead, this weekend might bring a bit of respite with showers and thunderstorms being more spotty. However, while the reign of Helene may weaken, a trailing upper-level low pressure system isn't far behind, looking to enhance rain prospects by Sunday afternoon and establish dominion into the early work week. With an already sodden ground, bouts of heavy rainfall could persist, and locals should stay alert for flood risks, forecasts suggest. For aviators, expect a streak of MVFR to IFR conditions due to persistent cloud cover, rains, and turbulent winds.
