C77 Poplar Grove

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. ADS-B tracking just started here — traffic history is still building. Wind calm — no directional preference.

certainty: — evidence: NONE no tower now

Wind calm · VFR · 8 min old · from KBUU (32.2 nm away)

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

30 36% 3773 ft · calm-wind rwy

12 22% 3773 ft

27 21% 2709 ft

9 21% 2709 ft

17 CLOSED 2467 ft

35 CLOSED 2467 ft

Active NOTAMs affecting runways

RWY CLOSED RWY 17/35 until 01-05 23:59Z

RWY 17/35 CLSD

Why — evidence behind this answer

Runway 30

PRIOR 30 is the designated calm-wind runway +0.50
PRIOR runway length 3773 ft +0.03

Runway 12

PRIOR runway length 3773 ft +0.03

Runway 27

PRIOR runway length 2709 ft -0.03

Runway 9

PRIOR runway length 2709 ft -0.03

Runway 17

NOTAM 17 not considered — closed by NOTAM until 2359Z 05 Jan

Runway 35

NOTAM 35 not considered — closed by NOTAM until 2359Z 05 Jan

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	8 min	Nearest station KBUU (32.2 nm away)
ADSB	WARMING_UP	435 min	Only 0 min of track history so far
NOTAM	OK
CIFP	NOT_CONFIGURED		Instrument procedures: phase 4

Recent operations

No operations observed in the last hour. (Only 0 min of track history so far)

Was this right?

C77 field & runways

Poplar Grove, Poplar Grove, Illinois. Field elevation 857 ft. Non-towered (NON-ATCT). Magnetic variation 3.0°W on record, 3.3°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 0.033°/year west — about 1° every 30 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	122.6°	125.9°	runway 13 by the rule today · 5.9° past	3,773 ft	ASPH	left
17	175.8°	179.1°	runway 18 by the rule today · 9.1° past	2,467 ft	TURF		CLOSED
27	270.1°	273.4°	matches rule gives runway 28 in ~48 yr	2,709 ft	TURF	left
30	302.6°	305.9°	runway 31 by the rule today · 5.9° past	3,773 ft	ASPH	left	calm-wind CALM WIND RWY.
35	355.8°	359.1°	runway 36 by the rule today · 9.1° past	2,467 ft	TURF		CLOSED
9	90.1°	93.4°	matches rule gives runway 10 in ~48 yr	2,709 ft	TURF	left

Generated 09:43:16Z · auto-refreshes · JSON

C77 ☆ Poplar Grove