Federal Environmental Telemetry Network
Observations read from official NOAA CO-OPS tide gauges and USGS Water Data sensors across the Mid-Atlantic. Every reading below carries the time it was measured; where a station has nothing recent, the card says so instead of showing a number.
Core Mid-Atlantic Telemetry Stations
Each card is one NOAA CO-OPS or USGS gauge, read at page load. A value appears only when the provider returned an observation, and it carries the time that observation was made.
Gauge reports as: Cambridge, MD
NOAA tide gauge at the mouth of the Severn — the central-Bay reference for the Annapolis and Eastern Bay grounds.
Gauge reports as: Charlestown, Northeast River, MD
NOAA tide gauge at the head of the Bay — the closest observation to the Susquehanna Flats and the North East River.
Gauge reports as: Chesapeake City, MD
NOAA gauge in the canal cut, where current runs hardest and the Elk River mixes with Delaware water.
Gauge reports as: CHOPTANK RIVER NEAR GREENSBORO, MD
USGS gauge on the upper Choptank — the freshwater signal for the Eastern Shore's largest tributary.
Gauge reports as: JAMES RIVER NEAR RICHMOND, VA
USGS gauge at the fall line — the flow feeding the tidal James and the upper estuary below the city.
Gauge reports as: Lewes, DE
NOAA gauge at the mouth of Delaware Bay — the coastal reference for the DE bayshore and inlet runs.
Gauge reports as: Ocean City Inlet, MD
NOAA gauge on the inlet jetty — the coastal reference for surf, inlet and nearshore trips.
Gauge reports as: Annapolis, MD
NOAA gauge on the tidal Potomac at Washington — tide and stage for the upper river above the Wilson Bridge.
Gauge reports as: POTOMAC RIVER NEAR WASH, DC LITTLE FALLS PUMP STA
USGS gauge above tidewater. The discharge here is what sets clarity and current on the tidal Potomac a day later.
Gauge reports as: RAPPAHANNOCK RIVER NEAR FREDERICKSBURG, VA
USGS gauge at the fall line — the discharge that sets clarity and current on the tidal Rappahannock downstream.
Gauge reports as: SUSQUEHANNA RIVER AT CONOWINGO, MD
USGS gauge below the dam — the flow that governs the Flats, and the number to check before a spring trip.