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Piedmont and Upper Potomac

Frederick, Carroll, Howard and Montgomery: Potomac bottomland, greentree reservoirs and farm ponds. Inland mallards and wood ducks, and no sea ducks.

4.6

Stable / Staging

Stable Birds / Staging

High confidence↓ -0.3 last 24hGreen-winged Teal 3.8

Wood Ducks score, conditions as of Mon, Oct 5, 9:00 PM

Piedmont and Upper Potomac

4.6

Steady temps

Legal light 5:39 AMSunrise 6:09 AMSunset 5:47 PM🌘 Waning crescent · 34%

5AM7W · 59°
6AM6WSW · 57°
7AM7WSW · 57°
8AM8W · 59°
9AM11W · 62°
10AM13WNW · 65°
11AM14NW · 66°
6.5Decoy score · Workable

Best window: 10:00 AM to 12:00 PM

Built around the strongest northwest wind of the morning

No strong migration triggers in the current data

Season dates · Eastern Zone October 10-17, November 14-27, and December 15, 2026 to January 30, 2027. Western Zone October 3-17, November 21-27, and December 15, 2026 to January 30, 2027.

Times shown for the region center. Season dates and limits change yearly and by zone: verify with Maryland DNR.

Ponds and creeks: OpenTidal marsh and guts: OpenThe open Bay and rivers: Open0 freezing degree-days over the last two weeks (estimated from air temps until the satellite ice feed lands)

Water on the landscape: Water on the landscape is in decent shape (20% of Maryland in drought, US Drought Monitor).

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  • No strong migration triggers in the current data

Fair

No strong migration triggers in the current data. Strongest window: Mon into Tue.

Wood Ducks
4.6Mon54.2Tue6

Days 8 through 14 sit beyond the reliable forecast window and lean on season history. Read them as a trend, not a promise.

The score is a weighted blend of the drivers below, each rated 0 to 10 from current conditions. No black box: this is the whole model.

Cold front / temp trend30% weight
3.6

Temps falling ~4°F into the next 48h

Wind direction + speed15% weight
3.7

NW winds to 11 mph across 4 of the next 48h

Freeze north of region6% weight
1.5

0% of upstream hours below 28°F

Snow advance upstream2% weight
1.5

Little to no snow upstream

Local open water / holding23% weight
9.0

Waters open, birds can stay and feed

Season timing20% weight
3.0

Shoulder of the migration window

Crop harvest / field feed3% weight
3.8

Corn ~45%, beans ~7% (typical-progress estimate)

Hunter reports0% weight
5.0

No reports in the last 72h, so this factor is not counted

Pro

The freeze line across the stations upstream of this region, station by station, so you see shallow water locking up before the birds arrive on it.

Pro

Last night's NEXRAD read on whether birds actually moved: how much lifted off after sunset, which way it tracked, and how fast it flew under its own power once the wind at that altitude is subtracted out.

56°Fnow
NW 9 mphwind
↓ 6°next 24h, falling
DayHi / LoWindSnow
MonOct 569° / 53°WNW 14 mph
TueOct 661° / 45°NNW 10 mph
WedOct 771° / 47°S 13 mph
ThuOct 881° / 52°W 15 mph
FriOct 969° / 48°NNW 8 mph
SatOct 1068° / 51°SE 8 mph
SunOct 1163° / 54°ESE 15 mph
Pro

What other hunters reported in this region over the last 72 hours: species, how hard they were feeding, and whether the birds looked like new arrivals. Filing your own report is free and counts toward this region's score either way.