KDEC Decatur

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 923 minutes old — treat with caution.

certainty: — evidence: NONE Class D

Wind 010° true at 3 kt · VFR · 923 min old

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

6 18% 8496 ft · 2 kt head, 2 kt x-left

24 18% 8496 ft · 2 kt TAIL, 2 kt x-right

30 17% 6799 ft · 1 kt head, 3 kt x-right

12 17% 6799 ft · 1 kt TAIL, 3 kt x-left

36 16% 5298 ft · 3 kt head, 1 kt x-right

18 16% 5298 ft · 3 kt TAIL, 1 kt x-left

Why — evidence behind this answer

Runway 6

PRIOR runway length 8496 ft +0.05
WIND 2 kt headwind, 2 kt left crosswind 923 min ago +0.00

Runway 24

PRIOR runway length 8496 ft +0.05
WIND 2 kt TAILWIND, 2 kt right crosswind 923 min ago -0.00

Runway 30

WIND 1 kt headwind, 3 kt right crosswind 923 min ago +0.00

Runway 12

WIND 1 kt TAILWIND, 3 kt left crosswind 923 min ago -0.00

Runway 36

PRIOR runway length 5298 ft -0.05
WIND 3 kt headwind, 1 kt right crosswind 923 min ago +0.00

Runway 18

PRIOR runway length 5298 ft -0.05
WIND 3 kt TAILWIND, 1 kt left crosswind 923 min ago -0.00

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	923 min
ADSB	UNAVAILABLE		No ADS-B track history here yet
NOTAM	ERROR		NOTAM source unreachable
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?

KDEC field & runways

Decatur, Decatur, Illinois. Field elevation 682 ft. Class D airspace. Towered. Magnetic variation 1.0°W on record, 3.1°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 0.045°/year west — about 1° every 22 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	119.2°	122.3°	matches rule gives runway 13 in ~60 yr	6,799 ft	ASPH-CONC	left
18	179.1°	182.2°	matches	5,298 ft	ASPH	left
24	239.0°	242.1°	matches	8,496 ft	ASPH-CONC	left
30	299.2°	302.3°	matches rule gives runway 31 in ~60 yr	6,799 ft	ASPH-CONC	left
36	359.1°	2.2°	matches	5,298 ft	ASPH	left
6	59.0°	62.1°	matches	8,496 ft	ASPH-CONC	left	ILS

Generated 11:17:12Z · auto-refreshes · JSON

KDEC ☆ Decatur