4G1 Greenville Muni

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. No weather observation available.

certainty: — evidence: NONE no tower now

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15 25% 3006 ft

23 25% 2551 ft

33 25% 3006 ft

5 25% 2551 ft

Active NOTAMs affecting runways

LIGHTING RWY 15 until 02-17 21:11Z

RWY 15 PAPI U/S

LIGHTING RWY 33 until 03-01 21:11Z

RWY 33 RWY END ID LGT U/S

LIGHTING RWY 33 until 03-01 21:11Z

RWY 33 PAPI U/S

Why — evidence behind this answer

Sources consulted

source	status	note
D_ATIS	UNAVAILABLE	No D-ATIS at this field
METAR	UNAVAILABLE	No weather observation found
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?

4G1 field & runways

Greenville Muni, Greenville, Pennsylvania. Field elevation 1206 ft. Non-towered (NON-ATCT). Magnetic variation 9.0°W on record, 9.1°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 0.007°/year east — about 1° every 143 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
15	140.6°	149.8°	matches	3,006 ft	ASPH	left
23	221.0°	230.1°	matches	2,551 ft	TURF	left
33	320.6°	329.8°	matches	3,006 ft	ASPH	left
5	41.0°	50.1°	matches	2,551 ft	TURF	left

Generated 08:41:43Z · auto-refreshes · JSON

4G1 ☆ Greenville Muni