KSUX Sioux Gateway/Brig General Bud Day Fld

WIND_INFERRED 80%

Runway 13 — favored by the wind (14 kt at 120° 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: 80% evidence: WEAK no tower now Class D

Wind 120° true at 14 kt G24 · VFR · 50 min old · from KLRJ (24.1 nm away)

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

13 87% 9002 ft · 14 kt head, 4 kt x-left

18 13% 6401 ft · 7 kt head, 12 kt x-left

36 <1% 6401 ft · 7 kt TAIL, 12 kt x-right

31 <1% 9002 ft · 14 kt TAIL, 4 kt x-right · calm-wind rwy

Active NOTAMs affecting runways

APCH OTS RWY 13 until 08-24 19:48Z

IAP SIOUX GATEWAY/BRIG GENERAL BUD DAY FLD, SIOUX CITY, IA. ILS OR LOC RWY 13, AMDT 3B... AUTOPILOT COUPLED APPROACH NA BELOW 2140FT MSL.

LIGHTING RWY 36 until 10-13 23:00Z

RWY 36 PAPI U/S

Why — evidence behind this answer

Runway 13

WIND 13 kt headwind, 4 kt left crosswind 50 min ago +2.99
PRIOR runway length 9002 ft +0.03

Runway 18

WIND 7 kt headwind, 12 kt left crosswind 50 min ago +1.16
PRIOR runway length 6401 ft -0.03

Runway 36

WIND 7 kt TAILWIND, 12 kt right crosswind 50 min ago -11.49
PRIOR runway length 6401 ft -0.03

Runway 31

WIND 13 kt TAILWIND, 4 kt right crosswind 50 min ago -39.84
PRIOR runway length 9002 ft +0.03

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	50 min	Nearest station KLRJ (24.1 nm away)
ADSB	WARMING_UP	2690 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)

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KSUX field & runways

Sioux Gateway/Brig General Bud Day Fld, Sioux City, Iowa. Field elevation 1098 ft. Class D airspace. Non-towered (ATCT-TRACON). Magnetic variation 3.0°E on record, 2.3°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 0.062°/year west — about 1° every 16 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	135.8°	133.5°	matches rule gives runway 14 in ~24 yr	9,002 ft	CONC	left	ILS
18	180.7°	178.4°	matches	6,401 ft	ASPH
31	315.8°	313.5°	matches rule gives runway 32 in ~24 yr	9,002 ft	CONC	left	ILS calm-wind RY 31 IS CALM WIND RY.
36	0.7°	358.4°	matches	6,401 ft	ASPH

Generated 10:24:36Z · auto-refreshes · JSON

KSUX ☆ Sioux Gateway/Brig General Bud Day Fld