KLAF Purdue University

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 1426 minutes old — treat with caution.

certainty: — evidence: NONE Class D

Wind 260° true at 3 kt · VFR · 1426 min old

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

28 26% 6600 ft · 3 kt head, 1 kt x-left

10 26% 6600 ft · 3 kt TAIL, 1 kt x-right

23 24% 4225 ft · 3 kt head, 2 kt x-right

5 24% 4225 ft · 3 kt TAIL, 2 kt x-left

Why — evidence behind this answer

Runway 28

PRIOR runway length 6600 ft +0.04
WIND 3 kt headwind, 1 kt left crosswind 1426 min ago +0.00

Runway 10

PRIOR runway length 6600 ft +0.04
WIND 3 kt TAILWIND, 1 kt right crosswind 1426 min ago -0.00

Runway 23

PRIOR runway length 4225 ft -0.04
WIND 3 kt headwind, 2 kt right crosswind 1426 min ago +0.00

Runway 5

PRIOR runway length 4225 ft -0.04
WIND 3 kt TAILWIND, 2 kt left crosswind 1426 min ago -0.00

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	1426 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)

Was this right?

KLAF field & runways

Purdue University, Lafayette, Indiana. Field elevation 606 ft. Class D airspace. Towered. Magnetic variation 1.0°W on record, 4.5°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 0.034°/year west — about 1° every 29 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
10	99.1°	103.7°	matches rule gives runway 11 in ~39 yr	6,600 ft	ASPH	left	ILS
23	229.4°	234.0°	matches rule gives runway 24 in ~31 yr	4,225 ft	ASPH	left
28	279.1°	283.7°	matches rule gives runway 29 in ~39 yr	6,600 ft	ASPH	left
5	49.4°	54.0°	matches rule gives runway 6 in ~31 yr	4,225 ft	ASPH	left

Generated 08:40:04Z · auto-refreshes · JSON

KLAF ☆ Purdue University