KISB Sibley Muni

WIND_INFERRED 70%

Runway 35 — favored by the wind (5 kt at 60° 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. ADS-B tracking just started here — traffic history is still building.

certainty: 70% evidence: NONE no tower now

Wind 060° true at 5 kt · VFR · 40 min old · from KLYV (24.9 nm away)

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

35 74% 3000 ft · 2 kt head, 4 kt x-right · calm-wind rwy

17 26% 3000 ft · 2 kt TAIL, 4 kt x-left

Why — evidence behind this answer

Runway 35

PRIOR 35 is the designated calm-wind runway +0.50
WIND 3 kt headwind, 4 kt right crosswind 40 min ago +0.11

Runway 17

WIND 3 kt TAILWIND, 4 kt left crosswind 40 min ago -0.42

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	40 min	Nearest station KLYV (24.9 nm away)
ADSB	WARMING_UP	4589 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?

KISB field & runways

Sibley Muni, Sibley, Iowa. Field elevation 1538 ft. Non-towered (NON-ATCT). Magnetic variation 2.0°E on record, 1.8°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 0.057°/year west — about 1° every 18 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
17	180.0°	178.2°	runway 18 by the rule today · 8.2° past	3,000 ft	CONC	left
35	0.0°	358.2°	runway 36 by the rule today · 8.2° past	3,000 ft	CONC	left	calm-wind RY 35 IS CALM WIND RY.

Generated 09:14:31Z · auto-refreshes · JSON

KISB ☆ Sibley Muni