KBTN Britton Muni

WIND_INFERRED 90%

Runway 13 — favored by the wind (11 kt at 130° true)

Based on wind only — no traffic or ATIS to confirm. No D-ATIS feed here — a voice ATIS/AWOS may exist; check the frequency. No ADS-B traffic data available.

certainty: 90% evidence: WEAK no tower now

Wind 130° true at 11 kt G17 · LIFR · 7 min old

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

13 95% 4210 ft · 11 kt head, 1 kt x-left

19 5% 2034 ft · 3 kt head, 10 kt x-left

1 <1% 2034 ft · 3 kt TAIL, 10 kt x-right

31 <1% 4210 ft · 11 kt TAIL, 1 kt x-right

Why — evidence behind this answer

Runway 13

WIND 11 kt headwind, 1 kt left crosswind 7 min ago +3.25
PRIOR runway length 4210 ft +0.07

Runway 19

WIND 3 kt headwind, 11 kt left crosswind 7 min ago +0.48
PRIOR runway length 2034 ft -0.07

Runway 1

WIND 3 kt TAILWIND, 11 kt right crosswind 7 min ago -3.83
PRIOR runway length 2034 ft -0.07

Runway 31

WIND 11 kt TAILWIND, 1 kt right crosswind 7 min ago -32.17
PRIOR runway length 4210 ft +0.07

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	7 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?

KBTN field & runways

Britton Muni, Britton, South Dakota. Field elevation 1318 ft. Non-towered (NON-ATCT). Magnetic variation 4.0°E on record, 3.2°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 0.058°/year west — about 1° every 17 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
1	23.3°	20.0°	runway 2 by the rule today · 10.0° past	2,034 ft	TURF	left
13	135.0°	131.7°	matches rule gives runway 14 in ~57 yr	4,210 ft	ASPH	left
19	203.3°	200.0°	runway 20 by the rule today · 10.0° past	2,034 ft	TURF	left
31	315.0°	311.7°	matches rule gives runway 32 in ~57 yr	4,210 ft	ASPH	left

Generated 08:42:21Z · auto-refreshes · JSON

KBTN ☆ Britton Muni