Upper Bay and Susquehanna Flats Duck Migration Forecast

Where Upper Bay and Susquehanna Flats is

Upper Bay and Susquehanna Flats is drawn from 2 counties in Maryland: Cecil and Harford. Those are the counties its shape on the DuckCast map is built from, so a hunter in any of them reads this region’s score.

When Upper Bay and Susquehanna Flats peaks

DuckCast’s season model puts the mallard peak here around mid January. The timing follows the statewide curve; what differs here is how many birds the model expects, below. That is a modelled typical curve, not a prediction for any single year. The actual push depends on cold fronts and freeze-up upstream, which is what the daily score tracks. Always confirm season dates with the state wildlife agency, linked below.

Which birds the model expects in Upper Bay and Susquehanna Flats

In DuckCast’s season model, the species that can score highest in Upper Bay and Susquehanna Flats are mallards, Canada geese and green-winged teal. Against the state as a whole, it expects more wigeon in Upper Bay and Susquehanna Flats and fewer scoters, blue-winged teal, pintails, snow geese and wood ducks.

Those weights come from harvest records, survey counts and the kind of water, not from a count taken here each season. They cap how high each species’ score can climb; the weather still has to bring the birds.

What DuckCast watches upstream of Upper Bay and Susquehanna Flats

5 upstream stations feed this region's freeze line, nearest first: Harrisburg, PA, about 65 miles northwest, Wilkes-Barre, PA, about 120 miles north, Williamsport, PA, about 125 miles north, Binghamton, NY, about 175 miles north and Montezuma, NY, about 240 miles north. When those stations ice over, the score here starts climbing before anything changes in the local sky.

Radar over Upper Bay and Susquehanna Flats

Each morning DuckCast reads the night’s NEXRAD data from KDOX, the National Weather Service radar at Dover, about 60 miles southeast of the region’s weather point. That puts the radar just outside the region, near enough to see birds lifting off and passing close by. Radar sees every bird in the air, not only ducks, so it confirms or questions the score rather than moving it.

Locations stay generalized

Hunter reports for Upper Bay and Susquehanna Flats are always shown at the region level. DuckCast never collects or displays exact coordinates, so filing a report here never burns a spot.