KCPS St Louis Downtown

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. ADS-B tracking just started here — traffic history is still building. Wind calm — no directional preference.

certainty: — evidence: NONE Class D

Wind calm · VFR · 29 min old · from KSTL (15.0 nm away)

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

12R 18% 7002 ft · right traffic

30L 18% 7002 ft

12L 17% 5301 ft

30R 17% 5301 ft · right traffic

23 15% 2799 ft

5 15% 2799 ft

Active NOTAMs affecting runways

APCH OTS RWY 12L until 11-30 23:00Z

TWY A2, A3, A4, TWY A BTN WEST RAMP AND TWY A4, TWY B3 BTN APCH END RWY 12L AND TWY B, TWY B4 BTN RWY 12L/30R AND RWY 12R/30L, TWY C2 BTN WEST RAMP AND APCH END RWY 23 LGT U/S

APCH OTS RWY 12L/30R until 11-30 23:00Z

TWY B BTN TWY B6 AND TWY B7, TWY B6 BTN RWY 12L/30R AND TWY B, TWY B7 BTN APCH END RWY 30L AND TWY B LGT U/S

APCH OTS RWY 30L until 10-30 20:00Z

NAV ILS RWY 30L OM U/S

Why — evidence behind this answer

Runway 12R

PRIOR runway length 7002 ft +0.08

Runway 30L

PRIOR runway length 7002 ft +0.08

Runway 12L

PRIOR runway length 5301 ft +0.02

Runway 30R

PRIOR runway length 5301 ft +0.02

Runway 23

PRIOR runway length 2799 ft -0.10

Runway 5

PRIOR runway length 2799 ft -0.10

Sources consulted

source	status	age	note
D_ATIS	UNAVAILABLE		No D-ATIS at this field
METAR	OK	29 min	Nearest station KSTL (15.0 nm away)
ADSB	WARMING_UP	1697 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?

KCPS field & runways

St Louis Downtown, Cahokia/St Louis, Illinois. Field elevation 413 ft. Class D airspace. Towered. Magnetic variation 0.0°W on record, 2.1°W 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 0.055°/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
12L	122.3°	124.4°	matches rule gives runway 13 in ~11 yr	5,301 ft	CONC
12R	122.3°	124.4°	matches rule gives runway 13 in ~11 yr	7,002 ft	ASPH	right
23	226.8°	228.9°	matches	2,799 ft	ASPH
30L	302.3°	304.4°	matches rule gives runway 31 in ~11 yr	7,002 ft	ASPH		ILS
30R	302.3°	304.4°	matches rule gives runway 31 in ~11 yr	5,301 ft	CONC	right
5	46.8°	48.9°	matches	2,799 ft	ASPH

Generated 10:20:27Z · auto-refreshes · JSON

KCPS ☆ St Louis Downtown