KMCW Mason City Muni

PROBABLE 67%

Runway 18 — 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. No ADS-B traffic data available.

certainty: 67% evidence: WEAK no tower now Class E

Wind 170° true at 8 kt · VFR · 55 min old · from KCCY (31.8 nm away)

▶ Listen live — ATIS/CTAF on LiveATC opens LiveATC’s own player · verify the broadcast yourself

18 61% 6501 ft · 8 kt head, 1 kt x-left

12 38% 5502 ft · 6 kt head, 6 kt x-right

30 <1% 5502 ft · 6 kt TAIL, 6 kt x-left · calm-wind rwy

36 <1% 6501 ft · 8 kt TAIL, 1 kt x-right

Active NOTAMs affecting runways

LIGHTING RWY 36 until 11-13 20:00Z

RWY 36 RAI LGT U/S

Why — evidence behind this answer

Runway 18

WIND 8 kt headwind, 1 kt left crosswind 55 min ago +1.26

Runway 12

WIND 6 kt headwind, 6 kt right crosswind 55 min ago +0.79

Runway 30

WIND 6 kt TAILWIND, 6 kt left crosswind 55 min ago -4.23

Runway 36

WIND 8 kt TAILWIND, 1 kt right crosswind 55 min ago -7.45

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	55 min	Nearest station KCCY (31.8 nm away)
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)

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KMCW field & runways

Mason City Muni, Mason City, Iowa. Field elevation 1213 ft. Class E airspace. Non-towered (NON-ATCT). Magnetic variation 0.0°W on record, 0.0°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 0.049°/year west — about 1° every 20 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
12	125.0°	125.0°	runway 13 by the rule today · 5.0° past	5,502 ft	ASPH	left
18	179.9°	179.9°	matches	6,501 ft	ASPH	left
30	305.0°	305.0°	runway 31 by the rule today · 5.0° past	5,502 ft	ASPH	left	calm-wind RY 30 IS CALM WIND RY.
36	359.9°	359.9°	matches	6,501 ft	ASPH	left	ILS

Generated 11:49:30Z · auto-refreshes · JSON

KMCW ☆ Mason City Muni