St Louis Regional Airport (KALN) Aviation Weather: METAR & ATIS
As of 7:50 AM CDT, Oct 27, KALN is currently VFR with calm winds, visibility 7 statute miles, and no ceiling reported. The FAA lists no ground stop or delay program for KALN right now.
Live aviation weather for St Louis Regional Airport in Alton/St Louis, IL, including METAR, ATIS, flight category, wind, visibility, ceiling, altimeter and runway crosswinds.
St Louis Regional Airport (KALN) is a regional airport serving Alton/St Louis, IL at a field elevation of 543 ft. KALN reports its own METAR, decoded live on this page as flight category, wind, visibility, ceiling and altimeter. It has 2 physical runways (11/29, 17/35), the longest 8,099 ft. The official FAA airport diagram is at the bottom of the page.
Wind calm, visibility 7 statute miles, no cloud data, temperature 8°C (46°F), altimeter 30.27 inHg. Conditions are Visual Flight Rules (VFR).
METAR KALN 271250Z 00000KT 07SM CLR 08/08 A3027
What changed at KALN?
Since the 1150Z (6:50 AM CDT) report, compared automatically against the latest METAR.
No significant changes since the 1150Z (6:50 AM CDT) report, conditions are holding steady.
Current pilot readout for KALN
KALN is currently VFR with calm winds, visibility 7 statute miles, and no ceiling reported. Density altitude is approximately -600 ft (field elevation 543 ft). KALN does not publish a TAF. The nearest TAF station is KSTL, about 17 nm away.
KALN by the numbers
What the long-run records say about flying here, computed for this airport alone.
KALN reported VFR in 80% of daylight observations over 20 years, about 234 flyable days a year. June is the most reliable month and December the least, with IFR or worse 13% of the time. When conditions drop it is usually low ceilings rather than fog (ceilings under 1,000 ft 6% of hours, visibility under 3 miles 3%).
Over 20 years of hourly winds, runway 17 had the best headwind 30% of the time, runway 29 29%, and winds were calm 23% of hours. Winds most often blow from the south. Crosswind on the best available runway topped 15 kt in under 1% of hours.
Thunderstorms were reported on about 49 days a year. 47% of storm hours fall in May, June and July, peaking in July when storms were in the air 2% of the time.
Snow fell on about 23 days a year and freezing rain or drizzle on 1. From December to February KALN was IFR or worse 12% of the time, against 4% from June to August.
Field elevation is 543 ft, but on a median summer afternoon the air performs like 2,222 ft, 1,679 ft higher. Plan for a longer takeoff roll and a weaker climb from June to August.
Gusts showed up in 12% of hours, typically 7 kt above the steady wind, and the strongest credible gust on record was 62 kt. April is the windiest month (mean 9 kt) and August the calmest.
Sources: hourly observations 2006 to 2025 and the per-runway wind climatology 2006 to 2025. Historical summaries, not a forecast: check the current METAR, TAF and a briefing before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
Runway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
Current wind is calm: calm wind is not a factor for runway selection, and with no wind there is no head/tail or crosswind component to compute. Live numbers return automatically once a report includes a wind direction.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 11 | 8,099 ft | ASP | - | - |
| 17 | 6,500 ft | ASP | - | - |
| 29 | 8,099 ft | ASP | - | - |
| 35 | 6,500 ft | ASP | - | - |
Open the crosswind calculator to try your own wind and runway numbers →
KALN runways
2 physical runways · 4 runway ends. Each card opens the runway's intelligence page: equipment and lighting, LAHSO, frequencies, today's configuration, predicted use, history and approaches.
- Status not monitoredRunway 11/298,099 × 150 ft · ASPCurrent useno stated-runway source at KALNWind
- 11
- no steady wind
- 29
- no steady wind
no active equipment NOTAM receivedView Runway Intelligence → - Status not monitoredRunway 17/356,500 × 100 ft · ASPCurrent useno stated-runway source at KALNWind
- 17
- no steady wind
- 35
- no steady wind
no active equipment NOTAM receivedView Runway Intelligence →
“Current use” is what the facilitystates; wind components are arithmetic on the current METAR against TRUE headings; status reflects NOTAMs received through SWIM, the tower's TFDM record and the D-ATIS — a runway reads “Open” only with a complete NOTAM picture.
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 0→0 kt, ceiling unlimited → unlimited.
KALN weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast. Drag to pan, tap ⚡ to toggle lightning.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © Stadia Maps © OpenMapTiles © OpenStreetMap
NOAA NEXRAD composite and lightning, updated about every five minutes; amber frames are HRRR model guidance, not observed radar. Not for navigation.
Pilot reports (PIREPs) within 100 NM of KALN
Reported by pilots in flight over the past 6 hours, via aviationweather.gov.
Show raw report
VIH UA /OV VIH/TM 1201/FL160/TP E170/TB MOD 160-190/RM ZKC FDC FN
VIH UAHeader: reporting station and UA: a routine pilot report.OV VIHLocation: fix or navaid, optionally with a radial and distance in NM.TM 1201Reported at 12:01 UTC.FL160Altitude: 16,000 ft MSL.TP E170Aircraft type reporting.TB MOD 160-190Turbulence: moderate 16,000–19,000 ft.RM ZKC FDC FNRemarks.⚠️ PIREPs are unverified pilot reports. Not for operational use: conditions change between reports.
Recent aviation weather trends at KALN
From ATIS Alerts' hourly weather history.
Over the past 24 hours, KALN reported mostly VFR across 42 observations, with 0 flight-category changes. Wind most often came from the S.
Most recent change: IFR → VFR
Share of hours each runway had the most headwind. From wind reports, not ATC assignments.
- 17
- 38%
- 11
- 22%
- 29
- 20%
- 35
- 20%
Get KALN weather alerts in Telegram
Stop refreshing aviation weather manually. Track KALN 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 KALN free on TelegramLive KALN Weather
Live crosswind meter
Measured by KALN's own weather station.
Wind is calm or variable. Either end works.
Asphalt · 8,099 ft. Headings from FAA runway data. Not for navigation.
Field aerial
North up
Runway 11/29, 17/35 drawn from FAA threshold coordinates.
Imagery: USGS The National Map (public domain). Something off? ✏️ Suggest an edit
Airport info
From the FAA airport record (cycle 2026-10-01) and OurAirports.
Services
- Fuel
- 100LL · Jet A
- Attended
- Daily 0700-2200 local
- Repairs
- Airframe & engine, major
- Oxygen
- Bottled, high pressure · Bulk, high pressure
- Transient parking
- Tie-downs · Hangars
- Landing fee
- No
- Other services
- Charter · Flight instruction · Aircraft rental
- Control tower
- Yes
- Wind indicator
- Lighted
Airport
- Type
- Regional airport
- ICAO
- KALN
- IATA
- ALN
- FAA LID
- ALN
- City
- Alton/St Louis
- State
- Illinois
- Country
- United States
- Elevation
- 543 ft
- Coordinates
- 38.8903, -90.0460
- Runways
- 2 physical runways · 4 runway ends
- Longest runway
- 8,099 ft
- Weather reporting
- Reports METAR
- TAF
- Nearest KSTL
- ATIS
- 128 MHz
- AWOS/ASOS
- 128 MHz
- CTAF
- 126 MHz
- Time zone
- America/Chicago
- Sunset in
- 9h 37m
Is there a ground stop at ALN today? Delay status and history →
Run a flight school, FBO, or club here? Embed KALN'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
8 airports+2 more within 50 NM
50–100 NM
7 airports+1 more within 100 NM
RC flying fields nearby
AMA model-aircraft club fields around this airport: live wind, crosswind & flyability on each page.
- St Louis Regional Airport , East Alton, IL · 1 mi
- East Side RC Club - Southern Illinois University Edwardsville , Edwardsville, IL · 6 mi
- Midwest Air Wing R/C Club - Bruns Rd , Pontoon Beach, IL · 13 mi
Historical Flying Weather at KALN
2006–2025 · ATIS Alerts Flying Weather Index
Based on historical observations from 2006–2025, KALN reported VFR conditions during about 80.2% of valid daylight observations, with an estimated 234 VFR flying days a year. June had the most VFR weather; December had the most instrument conditions. Surface winds averaged 7.0 kt, calm 17.3% of the time.
Full historical breakdown
Flight category by month
| Month | VFR % | MVFR % | IFR % | LIFR % |
|---|---|---|---|---|
| Jan | 66.6 | 19.9 | 8.5 | 5.1 |
| Feb | 72.8 | 17.0 | 7.3 | 2.9 |
| Mar | 75.9 | 16.9 | 5.6 | 1.7 |
| Apr | 83.0 | 11.8 | 3.9 | 1.3 |
| May | 83.7 | 10.9 | 4.2 | 1.2 |
| Jun | 89.4 | 7.9 | 2.0 | 0.7 |
| Jul | 87.7 | 8.6 | 2.5 | 1.2 |
| Aug | 85.9 | 9.9 | 2.8 | 1.4 |
| Sep | 84.8 | 10.0 | 3.6 | 1.6 |
| Oct | 82.6 | 10.4 | 5.0 | 1.9 |
| Nov | 76.7 | 15.5 | 5.2 | 2.7 |
| Dec | 63.3 | 24.0 | 8.4 | 4.3 |
Average wind by month
| Month | Mean wind (kt) |
|---|---|
| Jan | 8.4 kt |
| Feb | 8.2 kt |
| Mar | 8.5 kt |
| Apr | 8.6 kt |
| May | 6.9 kt |
| Jun | 6.2 kt |
| Jul | 5.0 kt |
| Aug | 4.8 kt |
| Sep | 5.0 kt |
| Oct | 6.7 kt |
| Nov | 7.5 kt |
| Dec | 7.9 kt |
Historical summary of past observations: not a forecast or safety rating. Always check the current METAR, TAF, and a weather briefing before flight.
KALN airport diagram
Official FAA taxiway and runway layout. Tap to zoom.
Official FAA airport diagram · d-TPP cycle 2611 · Not for navigation. Download the official FAA PDF ↗
Customize your ALN shirt or mug
ALN's real runway layout on the back, elevation and tower frequency on the front. Add your tail number on the sleeve.
Pilot PIREPs for St Louis Regional Airport (KALN)
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 Regional 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 KALN 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.
⚠️ 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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