Mid-Atlantic Region – A period of warming temperatures across the Mid-Atlantic is expected to trigger snow and river ice melt, leading to small but notable river rises across the Potomac and James River basins, according to the National Weather Service.
The Middle Atlantic River Forecast Center said temperatures on Tuesday climbed above freezing across much of the region, with the warmest readings reaching the 50s in Virginia. Forecasters said these conditions will allow steady melting of existing snowpack and river ice, increasing runoff into area waterways.
Light precipitation is also expected today, though rainfall amounts are forecast to remain below 0.25 inches of liquid, limiting the immediate flood threat. Even so, the combination of melting snow and light precipitation is expected to cause small river rises throughout the Potomac and James River basins, particularly along tributaries.
High temperatures for the remainder of the week are expected to remain near to slightly below normal, allowing river levels to stabilize after the initial melt. However, forecasters said temperatures are likely to trend above normal next week, which could renew snowmelt and increase runoff, especially if additional rain develops.
Roadways located near rivers, creeks, and flood-prone areas — including routes adjacent to Interstate 81, Interstate 95, U.S. Route 15, and U.S. Route 29 — may experience water encroachment near low-lying crossings if river levels rise more quickly than expected. Drivers are urged to remain alert in areas with a history of high water.
The National Weather Service recommends residents monitor river forecasts, particularly those living or working near waterways or commuting through river-adjacent corridors. Updated river forecasts, water temperatures, and ice monitoring tools are available through weather.gov/marfc.
