KSPW Spencer Muni

WIND_INFERRED 80%

Runway 18 — favored by the wind (15 kt at 190° 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: 80% evidence: WEAK no tower now Class E

Wind 190° true at 15 kt · VFR · 25 min old · from KEST (24.4 nm away)

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

18 89% 5100 ft · 15 kt head, 1 kt x-right

12 11% 6001 ft · 7 kt head, 13 kt x-right · calm-wind rwy

30 <1% 6001 ft · 7 kt TAIL, 13 kt x-left

36 <1% 5100 ft · 15 kt TAIL, 1 kt x-left

Active NOTAMs affecting runways

LIGHTING RWY 18 until 11-30 23:59Z

RWY 18 RWY END ID LGT U/S

LIGHTING RWY 36 until 11-30 23:59Z

RWY 36 RWY END ID LGT U/S

Why — evidence behind this answer

Runway 18

WIND 15 kt headwind, 1 kt right crosswind 25 min ago +3.05

Runway 12

WIND 7 kt headwind, 13 kt right crosswind 25 min ago +0.96

Runway 30

WIND 7 kt TAILWIND, 13 kt left crosswind 25 min ago -7.28

Runway 36

WIND 15 kt TAILWIND, 1 kt left crosswind 25 min ago -30.83

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	25 min	Nearest station KEST (24.4 nm away)
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?

KSPW field & runways

Spencer Muni, Spencer, Iowa. Field elevation 1339 ft. Class E airspace. Non-towered (NON-ATCT). Magnetic variation 5.0°E on record, 1.4°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 0.056°/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
12	126.3°	124.9°	matches rule gives runway 13 within a year	6,001 ft	CONC	left	ILS calm-wind RY 12 IS CALM WIND RY.
18	185.6°	184.2°	matches rule gives runway 19 in ~15 yr	5,100 ft	CONC
30	306.4°	304.9°	matches rule gives runway 31 within a year	6,001 ft	CONC	left
36	5.6°	4.2°	matches rule gives runway 1 in ~15 yr	5,100 ft	CONC

Generated 11:13:51Z · auto-refreshes · JSON

KSPW ☆ Spencer Muni