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 north-northwest (340°) at 4 kt, visibility 10+ statute miles, no cloud data, temperature 23°C (73°F), altimeter 29.96 inHg. Conditions are Visual Flight Rules (VFR).
METAR KCPS 130453Z AUTO 34004KT 10SM CLR 23/21 A2996 RMK AO2 SLP140 T02280206 $
What changed at KCPS?
Since the 0353Z (10:53 PM CDT) report, compared automatically against the latest METAR.
No significant changes since the 0353Z report, conditions are holding steady.
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 340° at 4 knots, visibility 10+ statute miles, and no ceiling reported. The strongest crosswind component is currently on runway 05, about 4 knots. Density altitude is approximately 1,400 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 →
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For pilots and crews overnighting at St Louis Downtown Airport (KCPS).
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Runway 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 |
|---|---|---|---|---|
| 30LFAV | 7,002 ft | ASP | 3 kt head | 2 kt right |
| 30R | 5,301 ft | CON | 3 kt head | 2 kt right |
| 05 | 2,799 ft | ASPH-F | 2 kt head | 4 kt left |
| 23 | 2,799 ft | ASPH-F | 2 kt tail | 4 kt right |
| 12L | 5,301 ft | CON | 3 kt tail | 2 kt left |
| 12R | 7,002 ft | ASP | 3 kt tail | 2 kt left |
Open the crosswind calculator to try your own wind and runway numbers →
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 4→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 © Stadia Maps © OpenMapTiles © OpenStreetMap
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
ENL UA /OV ENL/TM 0250/FL360/TP A320/TB LGT/RM /ZKCFDC CW
ENL UAHeader: reporting station and UA: a routine pilot report.OV ENLLocation: fix or navaid, optionally with a radial and distance in NM.TM 0250Reported at 02:50 UTC.FL360Altitude: 36,000 ft MSL.TP A320Aircraft type reporting.TB LGTTurbulence: light.RM /ZKCFDC CWRemarks.Show raw report
ARP UAL1394 3832N 09104W 0209 F340 274/043KT TB CONT LGT TURB OCNL MOD IC
ARP UAL1394 3832N 09104W 020…Header: reporting station and UA: a routine pilot report.Show raw report
STL UA /OV STL/TM 0204/FL320/TP A320/TB CONS LGT/RM /ZKCFDC CW
STL UAHeader: reporting station and UA: a routine pilot report.OV STLLocation: fix or navaid, optionally with a radial and distance in NM.TM 0204Reported at 02:04 UTC.FL320Altitude: 32,000 ft MSL.TP A320Aircraft type reporting.TB CONS LGTTurbulence: continuous light.RM /ZKCFDC CWRemarks.Show raw report
STL UA /OV STL325010/TM 0157/FL350/TP B738/TB MOD CHOP/RM /ZKCFDC CW
STL UAHeader: reporting station and UA: a routine pilot report.OV STL325010Location: fix or navaid, optionally with a radial and distance in NM.TM 0157Reported at 01:57 UTC.FL350Altitude: 35,000 ft MSL.TP B738Aircraft type reporting.TB MOD CHOPTurbulence: moderate chop.RM /ZKCFDC CWRemarks.Show raw report
DEC UA /OV AXC/TM 0143/FL340/TP E170/TB CONS LGT CHOP/RM /ZKCFDC CW
DEC UAHeader: reporting station and UA: a routine pilot report.OV AXCLocation: fix or navaid, optionally with a radial and distance in NM.TM 0143Reported at 01:43 UTC.FL340Altitude: 34,000 ft MSL.TP E170Aircraft type reporting.TB CONS LGT CHOPTurbulence: continuous light chop.RM /ZKCFDC CWRemarks.Show raw report
SPI UA /OV SPI/TM 0111/FL380/TP B737/TB NEG/RM /ZKCFDC CW
SPI UAHeader: reporting station and UA: a routine pilot report.OV SPILocation: fix or navaid, optionally with a radial and distance in NM.TM 0111Reported at 01:11 UTC.FL380Altitude: 38,000 ft MSL.TP B737Aircraft type reporting.TB NEGTurbulence: none reported.RM /ZKCFDC CWRemarks.⚠️ 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 a mix of conditions, most often VFR across 50 observations, with 24 flight-category changes. The lowest ceiling was 200 ft. Wind most often came from the W.
Most recent change: MVFR → VFR
Most recent change: MVFR → VFR
- 05
- 35%
- 12L/12R
- 34%
- 30L/30R
- 19%
- 23
- 12%
TAF | Terminal Aerodrome Forecast
Issued 0520Z (12:20 AM CDT)
TAF KCPS 130520Z 1306/1406 34003KT P6SM SCT250
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Nearby TFRs
Active FAA TFRs near KCPS
FAA TFR data shows an active temporary flight restriction near KCPS.
View all active US TFRs → · Official FAA TFR ↗
Verify with official FAA TFR sources before flight.
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
- Next sunset
- 18h 23m
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 at KCPS
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 2610 · 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.
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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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