KGGI Grinnell Rgnl

PROBABLE 68%

Runway 31 — local convention slightly favors it

No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. No ADS-B traffic data available. Weather observation is 3188 minutes old — treat with caution.

certainty: 68% evidence: NONE no tower now

Wind 230° true at 5 kt · VFR · 3188 min old

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

31 62% 5200 ft · 1 kt head, 5 kt x-left · calm-wind rwy

13 38% 5200 ft · 1 kt TAIL, 5 kt x-right

Active NOTAMs affecting runways

LIGHTING RWY 13 until 01-27 21:11Z

RWY 13 PAPI U/S

LIGHTING RWY 31 until 01-27 21:11Z

RWY 31 PAPI U/S

Why — evidence behind this answer

Runway 31

PRIOR 31 is the designated calm-wind runway +0.50
WIND 1 kt headwind, 5 kt left crosswind 3188 min ago +0.00

Runway 13

WIND 1 kt TAILWIND, 5 kt right crosswind 3188 min ago -0.00

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	3188 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?

KGGI field & runways

Grinnell Rgnl, Grinnell, Iowa. Field elevation 1008 ft. Non-towered (NON-ATCT). Magnetic variation 2.0°E on record, 0.4°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 0.052°/year west — about 1° every 19 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
13	131.1°	131.5°	matches	5,200 ft	CONC
31	311.1°	311.5°	matches	5,200 ft	CONC		calm-wind RY 31 IS CALM WIND RY.

Generated 10:23:28Z · auto-refreshes · JSON

KGGI ☆ Grinnell Rgnl