KMSN Dane County Rgnl/Truax Fld

UNKNOWN

Unknown — not enough evidence to call a runway

We don't know, and saying so beats guessing. 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. Weather observation is 3810 minutes old — treat with caution.

certainty: — evidence: NONE no tower now Class C

Wind 090° true at 6 kt · IFR · 3810 min old

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

36 27% 9006 ft · 0 kt head, 6 kt x-right

18 27% 9006 ft · 0 kt TAIL, 6 kt x-left

21 26% 7200 ft · 3 kt TAIL, 5 kt x-left

3 7% 7200 ft · 3 kt head, 5 kt x-right

14 7% 5846 ft · 4 kt head, 4 kt x-left

32 7% 5846 ft · 4 kt TAIL, 4 kt x-right

Active NOTAMs affecting runways

APCH OTS RWY 21 until 11-18 20:00Z

NAV ILS RWY 21 U/S

Why — evidence behind this answer

Runway 36

IMC_APCH IFR conditions and 36 has an instrument approach +1.30
PRIOR runway length 9006 ft +0.04
WIND 0 kt headwind, 6 kt right crosswind 3810 min ago -0.00

Runway 18

IMC_APCH IFR conditions and 18 has an instrument approach +1.30
PRIOR runway length 9006 ft +0.04
WIND 0 kt headwind, 6 kt left crosswind 3810 min ago -0.00

Runway 21

IMC_APCH IFR conditions and 21 has an instrument approach +1.30
WIND 3 kt TAILWIND, 5 kt left crosswind 3810 min ago -0.00

Runway 3

WIND 3 kt headwind, 5 kt right crosswind 3810 min ago +0.00

Runway 14

PRIOR runway length 5846 ft -0.04
WIND 4 kt headwind, 4 kt left crosswind 3810 min ago +0.00

Runway 32

PRIOR runway length 5846 ft -0.04
WIND 4 kt TAILWIND, 4 kt right crosswind 3810 min ago -0.00

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	3810 min
ADSB	WARMING_UP	3766 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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KMSN field & runways

Dane County Rgnl/Truax Fld, Madison, Wisconsin. Field elevation 887 ft. Class C airspace. Non-towered (ATCT-TRACON). Magnetic variation 3.0°W on record, 3.0°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 0.031°/year west — about 1° every 32 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	136.5°	139.6°	matches	5,846 ft	CONC	left
18	181.9°	184.9°	matches rule gives runway 19 in ~1 yr	9,006 ft	CONC	left	ILS
21	208.9°	211.9°	matches	7,200 ft	CONC		ILS
3	28.9°	31.9°	matches	7,200 ft	CONC
32	316.5°	319.6°	matches	5,846 ft	CONC	left
36	1.9°	4.9°	matches rule gives runway 1 in ~1 yr	9,006 ft	CONC	left	ILS

Generated 12:22:47Z · auto-refreshes · JSON

KMSN ☆ Dane County Rgnl/Truax Fld