St Louis Regional Airport

KALN / ALN

Alton/St Louis, US

Last Updated
Nov 3, 12:50 UTC

Current Weather

Display Units
Last Updated
12:50Z
☀️ Day
VFR
Flight Rules
4°C
Temperature
Dewpoint: 2°C
3kt
Variable
10 SM
Visibility
Ceiling
Unlimited
--
QNH (inHg)
Altimeter Setting

Raw METAR

METAR KALN 031250Z VRB03KT 10SM CLR 04/02 A3023

24-Hour Weather Evolution

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Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
Chart Features
  • • Hover for exact values and timestamps
  • • Click legend items to toggle data series
  • • Zoom and pan for detailed analysis
  • • Units automatically converted to preferences
Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
ALN
11
29
17
35

Runway Information

Runway Length Width Surface Heading Wind Component
11/29 8,101 ft 150 ft ASP 113° No wind data
17/35 6,500 ft 100 ft ASP 173° No wind data
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

St Louis Regional Airport - Airport Information

Airport Details

ICAO Code: KALN
IATA Code: ALN
Type: medium airport
Status: active
Elevation: 544 ft MSL

Location

City: Alton/St Louis
Country: US
Latitude: 38.890301°
Longitude: -90.045998°
Time Zone: Etc/GMT6

Runway Information

Runway 11/29
Length: 8,101 ft
Width: 150 ft
Surface: ASP
ILS: No
Runway 17/35
Length: 6,500 ft
Width: 100 ft
Surface: ASP
ILS: No

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Resources for Pilots

Weather Data

Current conditions and forecasts

• Real-time METAR reports
• Extended TAF forecasts
• Flight rules assessment
Charts & Navigation

Essential aviation charts

• Visual approach charts
• Instrument procedures
• Airport diagrams
Operations

Airport operational data

• Operating hours: 24/7
• Ground handling available
• Fuel services available
Performance Calculator

Calculate takeoff and landing distances

• Runway suitability assessment
• Real weather conditions
• Safety margin analysis
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About St Louis Regional Airport

St Louis Regional Airport (KALN/ALN) is a regional airport serving commercial and general aviation located in Alton/St Louis, US. The facility operates at an elevation of 544 feet above sea level and primarily serves regional commercial flights and general aviation.

The facility features 2 runways (11/29, 17/35) with ASP surface . Weather services provide regular METAR reports and TAF forecasts to ensure safe flight operations in all conditions.

Pilots can access comprehensive weather data, including current conditions, extended forecasts, and flight rules analysis. The airport information displayed here includes runway details, operational data, and essential resources for flight planning and execution. All weather data is updated regularly to provide the most current information for aviation decision-making.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.