St Louis Downtown Airport (KCPS) Aviation Weather, METAR, TAF & ATIS Alerts
Live aviation weather for St Louis Downtown Airport in Cahokia/St Louis, IL, including METAR, TAF, flight category, wind, visibility, ceiling, altimeter, runway crosswinds, and Telegram airport alerts.
St Louis Downtown Airport (KCPS) is a general aviation airport serving pilots in and around Cahokia/St Louis, IL at 413 ft. KCPS reports its own METAR and publishes a TAF — decoded live on this page as flight category, wind, visibility, ceiling and altimeter. Its 6 runways (05, 12L, 12R, 23) — longest 7,002 ft — are checked against the current wind in the crosswind table below. The official FAA airport diagram is at the bottom of the page. Track KCPS in the ATIS Alerts Telegram bot to get a message when a new METAR changes the picture — flight category, wind, or ceiling past your selected minimums.
Wind from the northeast (040°) at 4 kt, visibility 10+ statute miles, no cloud data, temperature 29°C (84°F), altimeter 29.83 inHg. Conditions are Visual Flight Rules (VFR).
METAR KCPS 290053Z 04004KT 10SM CLR 29/24 A2983 RMK AO2 SLP095 T02890244 $
What changed at KCPS?
Since the 2353Z (6:53 PM CDT) report — compared automatically against the latest METAR.
- Wind speed down from 9 to 4 kt.
This is exactly what ATIS Alerts watches for you — get a Telegram message when KCPS's weather changes, free →
Current pilot readout for KCPS
KCPS is currently VFR with winds from 040° at 4 knots, visibility 10+ statute miles, and no ceiling reported. The strongest crosswind component is currently on runway 12L, about 4 knots. Density altitude is approximately 2,300 ft (field elevation 413 ft). Review the latest TAF below for forecast changes before departure.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
Get KCPS weather alerts in Telegram
Stop refreshing aviation weather manually. Track KCPS in ATIS Alerts and get notified when a new METAR changes the picture — a category drop, or wind and ceiling moving toward your minimums.
Track KCPS free on TelegramRunway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
Use this section to quickly compare current wind alignment across available runways at KCPS. This is intended as a planning aid only and should not replace official performance calculations or pilot judgment.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 05FAV | 2,799 ft | ASPH-F | 4 kt head | 0 kt |
| 12L | 5,301 ft | CON | 1 kt head | 4 kt left |
| 12R | 7,002 ft | ASP | 1 kt head | 4 kt left |
| 30L | 7,002 ft | ASP | 1 kt tail | 4 kt right |
| 30R | 5,301 ft | CON | 1 kt tail | 4 kt right |
| 23 | 2,799 ft | ASPH-F | 4 kt tail | 0 kt |
Open the crosswind calculator — try your own wind and runway numbers →
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 24 h: wind 8→4 kt, ceiling unlimited → unlimited.
KCPS weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast — drag to pan, tap ⚡ to toggle lightning.
Live weather radar around St Louis Downtown Airport in Cahokia/St Louis, IL: the NOAA/NWS NEXRAD composite updates about every five minutes, with NOAA lightning strike density overlaid. The loop plays the past 50 minutes, then continues into a future-radar forecast (+1 to +4 hours, NOAA HRRR model) so you can see where precipitation around KCPS is headed.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © OpenStreetMap © CARTO
Forecast frames (amber label) are HRRR model guidance, not observed radar. Lightning strike density appears as a blue-white glow when strikes are detected in view. Radar and lightning coverage are limited in parts of Alaska, Hawaii, and offshore areas. Not for navigation.
Pilot reports (PIREPs) within 100 NM of KCPS
Reported by pilots in flight over the past 6 hours — via aviationweather.gov.
Show raw report
FYG UA /OV FTZ166015 /TM 2223 /FL025 /TP P28A /SK OVC030 /WX FV10SM /TB NEG
FYG UAHeader — reporting station and UA: a routine pilot report.OV FTZ166015Location — fix or navaid, optionally with a radial and distance in NM.TM 2223Reported at 22:23 UTC.FL025Altitude: 2,500 ft MSL.TP P28AAircraft type reporting.SK OVC030Sky condition — cloud bases and tops in hundreds of feet MSL.WX FV10SMWeather and flight visibility observed.TB NEGTurbulence: none reported.Show raw report
CMI UA /OV DEC/TM 2025/FL025/TP C700/SK OVC025 TOP027/RM DURC
CMI UAHeader — reporting station and UA: a routine pilot report.OV DECLocation — fix or navaid, optionally with a radial and distance in NM.TM 2025Reported at 20:25 UTC.FL025Altitude: 2,500 ft MSL.TP C700Aircraft type reporting.SK OVC025 TOP027Sky condition — cloud bases and tops in hundreds of feet MSL.RM DURCRemarks.⚠️ PIREPs are unverified pilot reports. Not for operational use — conditions change between reports.
Recent aviation weather trends at KCPS
From ATIS Alerts' hourly weather history.
Over the past 24 hours, KCPS reported mostly VFR across 25 observations, with 0 flight-category changes. The lowest ceiling was 5,500 ft. Wind most often came from the N.
Most recent change: MVFR → VFR
- 05
- 37%
- 23
- 23%
- 12L/12R
- 21%
- 30L/30R
- 19%
TAF — Terminal Aerodrome Forecast
Issued 2320Z (6:20 PM CDT)
TAF KCPS 282320Z 2900/2924 01006KT P6SM SCT250 FM290300 05006KT P6SM SKC
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Airport facts
Reference data from the OurAirports dataset.
- Type
- General aviation airport
- ICAO
- KCPS
- IATA
- CPS
- FAA LID
- CPS
- City
- Cahokia/St Louis
- State
- Illinois
- Country
- United States
- Elevation
- 413 ft
- Coordinates
- 38.5707, -90.1562
- Runways
- 6
- Longest runway
- 7,002 ft
- Weather reporting
- Reports METAR
- TAF
- Published
- ATIS
- 121.45 MHz
- CTAF
- 119.925 MHz
- Time zone
- America/Chicago
- Sunset in
- 7m
Run a flight school, FBO, or club here? Embed KCPS's live status on your website — free →
Nearby airports
Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.
Within 25 NM
9 airports+3 more within 25 NM
25–50 NM
9 airports+3 more within 50 NM
50–100 NM
6 airportsRC flying fields nearby
AMA model-aircraft club fields around this airport — live wind, crosswind & flyability on each page.
- Columbia R/C Flying Club Inc - Bluff Rd — Columbia, IL · 10 mi
- Midwest Air Wing R/C Club - Bruns Rd — Pontoon Beach, IL · 10 mi
- Belleville RC Flyers 1 — Belleville, IL · 14 mi
Historical Flying Weather
2006–2025 · ATIS Alerts Flying Weather Index
Based on historical observations from 2006–2025, KCPS reported VFR conditions during about 82.5% of valid daylight observations, with an estimated 259 VFR flying days a year. June had the most VFR weather; December had the most instrument conditions. Surface winds averaged 5.9 kt, calm 19.4% of the time.
Full historical breakdown
Flight category by month
| Month | VFR % | MVFR % | IFR % | LIFR % |
|---|---|---|---|---|
| Jan | 68.7 | 20.5 | 7.6 | 3.2 |
| Feb | 74.2 | 17.3 | 6.6 | 1.9 |
| Mar | 77.5 | 16.7 | 4.6 | 1.2 |
| Apr | 85.2 | 10.7 | 3.4 | 0.8 |
| May | 85.6 | 10.4 | 3.2 | 0.8 |
| Jun | 91.7 | 6.4 | 1.6 | 0.3 |
| Jul | 90.5 | 6.3 | 2.3 | 0.9 |
| Aug | 88.7 | 8.3 | 2.3 | 0.7 |
| Sep | 85.4 | 9.6 | 3.5 | 1.5 |
| Oct | 83.6 | 10.8 | 4.5 | 1.1 |
| Nov | 79.1 | 14.2 | 4.8 | 2.0 |
| Dec | 67.4 | 23.3 | 6.7 | 2.6 |
Average wind by month
| Month | Mean wind (kt) |
|---|---|
| Jan | 7.2 kt |
| Feb | 7.4 kt |
| Mar | 7.6 kt |
| Apr | 7.3 kt |
| May | 5.7 kt |
| Jun | 4.9 kt |
| Jul | 4.2 kt |
| Aug | 4.0 kt |
| Sep | 4.1 kt |
| Oct | 5.5 kt |
| Nov | 6.3 kt |
| Dec | 6.6 kt |
Historical summary of past observations — not a forecast or safety rating. Always check the current METAR, TAF, and a weather briefing before flight.
KCPS airport diagram
Official FAA taxiway and runway layout. Tap to zoom.
The FAA airport diagram for St Louis Downtown Airport in Cahokia/St Louis, IL shows the runway and taxiway layout across 6 runways, ramp areas, and hold-short positions — review it before taxiing at an unfamiliar field.
Official FAA airport diagram · d-TPP cycle 2608 · Not for navigation. Download the official FAA PDF ↗
KCPS weather — frequently asked
What runways are available at KCPS?+
KCPS has 6 runways — 05, 12L, 12R, 23, 30L, 30R; the longest is 7,002 ft. This page computes the live crosswind for each runway end from the current wind.
Does KCPS report its own weather?+
Yes — St Louis Downtown Airport has its own weather station and publishes METAR observations, which this page decodes live.
Does KCPS have a TAF?+
Yes — the TAF is shown on this page below the current conditions.
Does KCPS broadcast D-ATIS?+
No — KCPS does not broadcast D-ATIS. Alerts for KCPS from the ATIS Alerts bot (@atisalerts_bot) are based on its METAR instead.
Where can I find the KCPS airport diagram?+
The official FAA airport diagram for St Louis Downtown Airport (KCPS) is shown on this page — it maps the runway and taxiway layout, ramps, and hold-short lines. Tap it to zoom, or download the official FAA PDF free from the link under the diagram (updated every 28-day FAA charting cycle).
Pilot PIREPs for St Louis Downtown Airport (KCPS)
Community-submittedCommunity-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.
Read recent community-submitted pilot notes for St Louis Downtown Airport, including runway conditions, wildlife activity, FBO/fuel notes, turbulence, ramp access, and local airport tips.
⚠️ Pilot PIREPs on ATIS Alerts are community-submitted airport notes for situational awareness only. They are not official FAA PIREPs, NOTAMs, weather briefings, airport advisories, or flight-planning guidance. Always verify with official FAA/NWS sources, airport management, ATC, and current publications.
No Pilot PIREPs have been submitted for KCPS yet. Recently flew here? Help the next pilot by leaving a quick airport note.
Pilot PIREPs are community pilot notes for situational awareness only — not official FAA PIREPs or advisories. Verify with official sources. Notes are moderated before they appear; helpful marks and reports help us keep them useful.
Why pilots use ATIS Alerts
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- Get pinged the moment KCPS drops below VFR or a new report moves your numbers.
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⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
No D-ATIS at this airport — showing METAR.
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