KMDH Southern Illinois

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. Weather observation is 470 minutes old — treat with caution. Wind calm — no directional preference.

certainty: — evidence: NONE Class D

Wind calm · VFR · 470 min old

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18L 18% 6506 ft

36R 18% 6506 ft

24 16% 4163 ft

6 16% 4163 ft

18R 16% 3498 ft

36L 16% 3498 ft

Active NOTAMs affecting runways

LIGHTING RWY 24

RWY 24 RWY END ID LGT U/S

LIGHTING RWY 6

RWY 06 RWY END ID LGT U/S

Why — evidence behind this answer

Runway 18L

PRIOR runway length 6506 ft +0.07

Runway 36R

PRIOR runway length 6506 ft +0.07

Runway 18R

PRIOR runway length 3498 ft -0.05

Runway 36L

PRIOR runway length 3498 ft -0.05

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	470 min
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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KMDH field & runways

Southern Illinois, Carbondale/Murphysboro, Illinois. Field elevation 411 ft. Class D airspace. Towered. Magnetic variation 1.0°W on record, 2.6°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 0.055°/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
18L	181.2°	183.9°	matches rule gives runway 19 in ~20 yr	6,506 ft	ASPH	left	ILS
18R	181.2°	183.9°	matches rule gives runway 19 in ~21 yr	3,498 ft	ASPH
24	240.6°	243.2°	matches rule gives runway 25 in ~32 yr	4,163 ft	ASPH	left
36L	1.2°	3.9°	matches rule gives runway 1 in ~21 yr	3,498 ft	ASPH
36R	1.2°	3.9°	matches rule gives runway 1 in ~20 yr	6,506 ft	ASPH	left
6	60.6°	63.2°	matches rule gives runway 7 in ~32 yr	4,163 ft	ASPH	left

Generated 08:41:38Z · auto-refreshes · JSON

KMDH ☆ Southern Illinois