KCPS St Louis Downtown Airport
St Louis Downtown Airport (CPS) is a towered general-aviation airport in Cahokia/St Louis, Illinois, at 413 ft elevation, with 3 runways: 12R/30L (7,002 ft), 12L/30R (5,301 ft), 05/23 (2,799 ft). Below: the current METAR and TAF decoded in plain English, runway wind components, frequencies, and the FAA terminal procedures for d-TPP 2611 (Oct 29, 2026 – Nov 26, 2026).
| Identifiers | ICAO KCPS · FAA CPS · IATA CPS |
|---|---|
| Location | Cahokia/St Louis, IL · 38.5707, -90.1562 |
| Elevation | 413 ft MSL (126 m) |
| Tower | 119.925 MHz (DOWNTOWN TWR) |
| ATIS | 121.45 MHz |
| FAA charts | 18 in d-TPP 2611 (Oct 29, 2026 – Nov 26, 2026) |
KCPS METAR and TAF
METAR KCPS 010453Z AUTO 15006KT 10SM SCT110 18/13 A3025 RMK AO2 SLP241 T01830128 $| Wind | From 150° at 6 kt |
|---|---|
| Visibility | 10 statute miles or more |
| Weather | None reported |
| Clouds | Scattered 11,000 ft |
| Temperature / dew point | 18°C (64°F) / 13°C (55°F) · spread 5°C |
| Altimeter | 30.25 inHg (1024 hPa) |
| Flight category | VFR — ceiling above 3,000 ft and visibility above 5 SM |
Remarks: AO2: automated station with a precipitation sensor · SLP241: sea-level pressure 1024.1 hPa · T01830128: temperature 18.3°C, dew point 12.8°C · $: the station needs maintenance
Wind components by runway
From the METAR wind (150° true at 6 kt) and the runway true headings. Tower and ATIS winds are magnetic — use those for the actual runway choice.
- RWY 12R: headwind 5 kt, crosswind 3 kt from the right
- RWY 30L: tailwind 5 kt, crosswind 3 kt from the left
- RWY 12L: headwind 5 kt, crosswind 3 kt from the right
- RWY 30R: tailwind 5 kt, crosswind 3 kt from the left
- RWY 05: tailwind 1 kt, crosswind 6 kt from the right
- RWY 23: headwind 1 kt, crosswind 6 kt from the left
TAF (terminal forecast)
Issued 31st at 23:37Z · valid 1st 00Z – 1st 24Z
TAF KCPS 312337Z 0100/0124 10004KT P6SM OVC100 PROB30 0104/0106 6SM -RA FM010600 13005KT 6SM -RA BR SCT025 OVC050 FM011100 12005KT 5SM -RA BR OVC015 FM011500 11006KT P6SM OVC015- Initially · 1st 00Z – 1st 24Z: wind 100° at 4 kt · visibility more than 6 statute miles · overcast 10,000 ft
- 30% chance · 1st 04Z – 1st 06Z: visibility 6 statute miles · light rain
- From · 1st 06:00Z: wind 130° at 5 kt · visibility 6 statute miles · light rain, mist · scattered 2,500 ft, overcast 5,000 ft
- From · 1st 11:00Z: wind 120° at 5 kt · visibility 5 statute miles · light rain, mist · overcast 1,500 ft
- From · 1st 15:00Z: wind 110° at 6 kt · visibility more than 6 statute miles · overcast 1,500 ft
Source: NOAA Aviation Weather Center (aviationweather.gov). Times are UTC (Z). Decoded for learning — get an official weather briefing before flight.
Runways
| Runway | Length × width | Surface | Lighted |
|---|---|---|---|
| 12R / 30L | 7,002 × 150 ft | asphalt | Yes |
| 12L / 30R | 5,301 × 75 ft | concrete | Yes |
| 05 / 23 | 2,799 × 75 ft | asphalt | No |
Frequencies
| Service | Name | MHz |
|---|---|---|
| Approach / departure | APP/DEP | 123.7 |
| ATIS | 121.45 | |
| Clearance delivery | CLNC DEL | 121.8 |
| CTAF | 119.925 | |
| Ground | 121.8 | |
| Tower | DOWNTOWN TWR | 119.925 |
| UNICOM | 122.95 |
Runways and frequencies: OurAirports (public domain) — they can change. Check the FAA Chart Supplement for KCPS before you fly.
FAA charts for KCPS — d-TPP 2611
18 charts effective Oct 29, 2026 09:01Z until Nov 26, 2026 09:01Z. Each link opens the original FAA PDF (aeronav.faa.gov).
Airport diagram 1
Instrument approach procedures 4
Departure procedures (DP / ODP) 7
Arrivals (STAR) 4
Minimums, hot spots and notices 2
KCPS on the FAA d-TPP search · Chart Supplement
KCPS charts and weather, offline in the cockpit
TOGA EFB opens the KCPS airport diagram and approach plates straight from the FAA, saves them for offline use, and decodes the METAR and TAF for you.
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Nearby airports
- KSTL St. Louis Lambert International Airport 15 nm
- KALN St Louis Regional Airport 20 nm
- KSUS Spirit of St Louis Airport 24 nm
- KMDH Southern Illinois Airport 64 nm
- KJEF Jefferson City Memorial Airport 94 nm
- KCMI University of Illinois Willard Airport 124 nm
All 274 US airports · E6B flight computer · Weight & balance
Charts: FAA digital Terminal Procedures Publication (d-TPP), public domain — linked unmodified, not hosted here. Airport data: OurAirports (public domain). Weather: NOAA Aviation Weather Center.
For practice and reference only — not for navigation or flight planning. Always check current official sources (FAA charts, Chart Supplement, NOTAMs, an official weather briefing). The pilot in command is responsible for the flight.