runwayinuse

3O9 Grand Lake Rgnl

17
WIND_INFERRED 70%

Runway 17 — favored by the wind (4 kt at 190° true)

Based on wind only — no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. No ADS-B traffic data available.

certainty: 70% evidence: NONE no tower now

N 17 35

Wind 190° true at 4 kt · VFR · 21 min old · from K1K8 (7.5 nm away)

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17 70% 3925 ft · 4 kt head, 1 kt x-right
35 30% 3925 ft · 4 kt TAIL, 1 kt x-left
Why — evidence behind this answer

Runway 17

Runway 35

Sources consulted

sourcestatus agenote
D_ATISUNAVAILABLE No D-ATIS at this field
METAROK 21 min Nearest station K1K8 (7.5 nm away)
ADSBUNAVAILABLE No ADS-B track history here yet
NOTAMOK
CIFPNOT_CONFIGURED Instrument procedures: phase 4

Recent operations

No operations observed in the last hour. (No ADS-B track history here yet)

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3O9 field & runways

Grand Lake Rgnl, Afton, Oklahoma. Field elevation 792 ft. Non-towered (NON-ATCT). Magnetic variation 5.0°E on record, 1.3°E 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 0.071°/year west — about 1° every 14 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
17 171.0° 169.7° matches 3,925 ft CONC left
35 351.0° 349.7° matches 3,925 ft CONC left

Generated 11:15:41Z · auto-refreshes · JSON