8S1 Polson

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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03W 25% 4000 ft

18 25% 4194 ft

21W 25% 4000 ft

36 25% 4194 ft

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?

8S1 field & runways

Polson, Polson, Montana. Field elevation 2941 ft. Non-towered (NON-ATCT). Magnetic variation 17.0°E on record, 12.7°E 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 0.107°/year west — about 1° every 9 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
03W	not published		—	4,000 ft	WATER
18	198.5°	185.8°	runway 19 by the rule today · 5.8° past	4,194 ft	ASPH	left
21W	not published		—	4,000 ft	WATER
36	18.5°	5.8°	runway 1 by the rule today · 5.8° past	4,194 ft	ASPH	left

Generated 08:41:42Z · auto-refreshes · JSON