3Y3 Winterset Muni

PROBABLE 68%

Runway 32 — local convention slightly favors it

No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. No ADS-B traffic data available. No weather observation available.

certainty: 68% evidence: NONE no tower now

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32 62% 3002 ft · calm-wind rwy

14 38% 3002 ft

Why — evidence behind this answer

Runway 32

PRIOR 32 is the designated calm-wind runway +0.50

Sources consulted

source	status	note
D_ATIS	UNAVAILABLE	No D-ATIS at this field
METAR	UNAVAILABLE	No weather observation found
ADSB	UNAVAILABLE	No ADS-B track history here yet
NOTAM	OK
CIFP	NOT_CONFIGURED	Instrument procedures: phase 4

Recent operations

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

Was this right?

3Y3 field & runways

Winterset Muni, Winterset, Iowa. Field elevation 1116 ft. Non-towered (NON-ATCT). Magnetic variation 2.0°E on record, 0.6°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 0.057°/year west — about 1° every 18 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
14	142.8°	142.2°	matches rule gives runway 15 in ~49 yr	3,002 ft	ASPH	left
32	322.8°	322.2°	matches rule gives runway 33 in ~49 yr	3,002 ft	ASPH	left	calm-wind RWY 32 IS CALM WIND RWY.

Generated 08:41:40Z · auto-refreshes · JSON

3Y3 ☆ Winterset Muni