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. No ADS-B traffic data available. Wind calm — no directional preference.

certainty: — evidence: NONE no tower now Class C

Wind calm · VFR · 37 min old · from KJVL (33.7 nm away)

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21 26% 7200 ft

3 26% 7200 ft

14 24% 5846 ft

32 24% 5846 ft

18 CLOSED 9006 ft

36 CLOSED 9006 ft

Active NOTAMs affecting runways

RWY CLOSED RWY 18/36 until 10-14 17:00Z

RWY 18/36 CLSD

APCH OTS RWY 18 until 10-14 17:00Z

NAV ILS RWY 18 U/S

LIGHTING RWY 18 until 10-14 17:00Z

RWY 18 PAPI U/S

APCH OTS RWY 21 until 10-09 20:00Z

NAV ILS RWY 21 LOC U/S

APCH OTS RWY 21 until 10-13 20:00Z

NAV ILS RWY 21 U/S

LIGHTING RWY 3 until 12-31 23:00Z

RWY 03 PAPI U/S

APCH OTS RWY 36 until 10-14 17:00Z

NAV ILS RWY 36 U/S

Why — evidence behind this answer

Runway 21

PRIOR runway length 7200 ft +0.02

Runway 3

PRIOR runway length 7200 ft +0.02

Runway 14

PRIOR runway length 5846 ft -0.02

Runway 32

PRIOR runway length 5846 ft -0.02

Runway 18

NOTAM 18 not considered — closed by NOTAM until 2200Z 09 Oct

Runway 36

NOTAM 36 not considered — closed by NOTAM until 2200Z 09 Oct

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	37 min	Nearest station KJVL (33.7 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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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 CLOSED
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 CLOSED

Generated 09:11:43Z · auto-refreshes · JSON

KMSN ☆ Dane County Rgnl/Truax Fld