KTTF Custer

WIND_INFERRED 70%

Runway 21 — 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. ADS-B tracking just started here — traffic history is still building.

certainty: 70% evidence: NONE no tower now

Wind 190° true at 4 kt · VFR · 19 min old · from KDTW (18.1 nm away)

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21 72% 4997 ft · 4 kt head, 1 kt x-left

3 28% 4997 ft · 4 kt TAIL, 1 kt x-right

Active NOTAMs affecting runways

LIGHTING RWY 3 until 01-21 21:11Z

RWY 03 VASI U/S

Why — evidence behind this answer

Runway 21

WIND 4 kt headwind, 1 kt left crosswind 19 min ago +0.20

Runway 3

WIND 4 kt TAILWIND, 1 kt right crosswind 19 min ago -0.71

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	19 min	Nearest station KDTW (18.1 nm away)
ADSB	WARMING_UP	2500 min	Only 0 min of track history so far
NOTAM	OK
CIFP	NOT_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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KTTF field & runways

Custer, Monroe, Michigan. Field elevation 616 ft. Non-towered (NON-ATCT). Magnetic variation 5.0°W on record, 7.2°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 0.007°/year west — about 1° every 143 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.
Runway	True	Magnetic	Number	Length	Surface	Pattern	Notes
21	202.4°	209.6°	matches	4,997 ft	ASPH	left
3	22.4°	29.6°	matches	4,997 ft	ASPH	left

Generated 09:11:44Z · auto-refreshes · JSON

KTTF ☆ Custer