US
KALN
Current Weather

St Louis Regional Airport

KALN / ALN

Alton/St Louis, US

Last Updated

Sep 16, 06:55 UTC

Current Weather

Display Units

Time

Temp

Wind

Last Updated

06:55Z

☀️ Day

VFR

Flight Rules

20°C

Temperature

Dewpoint: 18°C

--°

10 SM

Visibility

∞

Ceiling

Unlimited

30.11

QNH (inHg)

Altimeter Setting

Raw METAR

METAR KALN 160655Z 10SM CLR 20/18 A3011 RMK AO2 T01950177 TSNO

Altimeter Settings & Pressure Information

QNH

30.11 inHg

Sea Level Pressure

For altitude above MSL

QFE

29.57 inHg

Field Pressure

Height above aerodrome (544 ft)

Pressure Alt

354 ft

QNE Reference

Standard: 29.92 inHg

Density Altitude: 1,085 ft

ISA Deviation: +6.1°C

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

↑

ALN

Runway Information

Runway	Length	Width	Surface	Heading
11/29	8,101 ft	150 ft	ASP	113°
17/35	6,500 ft	100 ft	ASP	173°

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

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.