Alerts & Conditions

Alerts and Closures

Please check directly with the local trail manager of the Potomac Heritage National Scenic Trail section you will be visiting for the most accurate and up-to-date information.

Current Weather and Forecast

The weather along the Potomac Heritage National Scenic Trail can change quickly and can deviate considerably from the forecast, so prepare for all conditions when planning your adventure.

For additional details or other forecasts, visit the National Weather Service.

Sea Nettles Probability of Encounters (Experimental)

Click the image below for the most up to date maps.

The maps are experimental and depict the probability of encountering the sea nettles, Chrysaora chesapeakei in the Chesapeake Bay and its tributaries. Click the image to view the Sea Nettle Probability Guidance.