runwayinuse

4N2 Middlesex Valley

21
PROBABLE 60%

Runway 21 — wind slightly favors it, low confidence

Based mostly on wind; no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. ADS-B tracking just started here — traffic history is still building.

certainty: 60% evidence: NONE no tower now

N 21 3

Wind 260° true at 4 kt · VFR · 38 min old · from KIUA (11.7 nm away)

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21 58% 2130 ft · 2 kt head, 3 kt x-right
3 42% 2130 ft · 2 kt TAIL, 3 kt x-left
Why — evidence behind this answer

Runway 21

Runway 3

Sources consulted

sourcestatus agenote
D_ATISUNAVAILABLE No D-ATIS at this field
METAROK 38 min Nearest station KIUA (11.7 nm away)
ADSBWARMING_UP 3645 min Only 0 min of track history so far
NOTAMOK
CIFPNOT_CONFIGURED Instrument procedures: phase 4

Recent operations

No operations observed in the last hour. (Only 0 min of track history so far)

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4N2 field & runways

Middlesex Valley, Middlesex, New York. Field elevation 770 ft. Non-towered (NON-ATCT). Magnetic variation 12.0°W on record, 11.2°W today.

The FAA's variation of record is the number this field was surveyed against; the second is where north points now, from WMM2025. It is moving 0.035°/year east — about 1° every 29 years — which is why runway numbers eventually stop matching their pavement.

Runway data from the FAA NASR 01 Oct 2026 cycle. Where NASR locates both thresholds, the true heading is the bearing between them rather than NASR's whole-degree alignment. Magnetic is that heading against today's declination from WMM2025, not the field's variation of record — so it can differ from the chart by the gap between the two shown above. The number painted on the runway is the one ATC uses.
RunwayTrueMagnetic Number LengthSurfacePattern Notes
21 200.9° 212.1° matches 2,130 ft TURF
3 20.9° 32.1° matches 2,130 ft TURF

Generated 09:13:24Z · auto-refreshes · JSON