Definition

An Automated Weather Observing System (AWOS) is a ground-based, automated station that continuously measures and broadcasts real-time weather conditions at airports and aerodromes. Automated weather observing system provides critical aviation parameters such as wind, visibility, temperature, dew point, altimeter setting, cloud height, and precipitation.

Usage

Drone operators use automated weather observing system reports to understand local atmospheric conditions before flight. Because AWOS stations update frequently and operate 24/7, they offer highly reliable weather data for pre-flight assessments, especially for missions near controlled airspace or aerodrome traffic zones.

Relevance to the Industry

Automated weather observing system’s plays an increasingly important role in drone safety and regulatory compliance. These systems help operators evaluate:
• Wind limits for takeoff, landing, and stability
• Visibility requirements for VLOS operations
• Cloud ceilings for altitude planning
• Temperature and humidity impacts on battery life and sensor performance
• Pressure changes affecting barometric altitude readings

Automated weather observing system data allows drone teams to anticipate hazards early, make informed go/no-go decisions, and maintain safe operations during dynamic weather shifts.

How Does AWOS (Automated Weather Observing System) Work?

Automated weather observing system’s use a network of automated sensors installed at an aerodrome. Each sensor continuously samples atmospheric conditions, validates data, and feeds it to a processing unit. The system then broadcasts this information through radio, telephone, or online aviation weather platforms. Automated weather observing system stations are typically categorized by capability:
• AWOS-A: Altimeter only
• AWOS-1: Adds wind and temperature
• AWOS-2: Adds visibility sensors
• AWOS-3: Includes cloud/ceiling detection
• AWOS-3PT: Adds precipitation type and lightning

The system updates at regular intervals—often every 20 to 60 seconds—providing more frequent weather insight than METAR reports.

Example in Use

A drone operator preparing for a commercial inspection near an aerodrome checks the Automated weather observing system feed and sees that surface winds are gusting above aircraft limits. The mission is postponed, preventing a safety risk and maintaining compliance with local aviation procedures.

Frequently Asked Questions About AWOS (Automated Weather Observing System)

How is AWOS different from ASOS?
ASOS is a more advanced, federally maintained system with broader weather detection capabilities. Automated weather observing systems vary by level and may be maintained by local airports.

Does AWOS replace METARs?
No. Automated weather observing systems provide continuous real-time data; METARs provide standardized hourly reports.

Can drone pilots access AWOS data online?
Yes. Automated weather observing system reports appear on aviation weather services, mobile apps, and sometimes direct telephone hotlines.