An AIRMET is a weather advisory issued to inform pilots of widespread meteorological conditions that may affect flight safety, particularly for light aircraft or operations conducted under VFR. While less severe than SIGMETs, AIRMETs highlight conditions that require caution, planning, and possible mitigation.
AIRMETs are intended to raise situational awareness, not necessarily to prohibit flight.
Weather phenomena covered by AIRMETs
AIRMETs are issued for three primary categories:
- AIRMET Tango
- Moderate turbulence
- Sustained surface winds ≥ 30 kt
- Non-convective low-level wind shear
- AIRMET Zulu
- Moderate icing
- Freezing level information
- AIRMET Sierra
- IFR conditions
- Mountain obscuration
- Reduced visibility due to weather
Key characteristics
- Area-based advisory: Covers broad regions rather than point locations
- Lower severity than SIGMET: Conditions are hazardous but not extreme
- Applies to VFR and IFR: Especially relevant to VFR operations
- Duration: Typically valid for up to 6 hours, with updates as conditions evolve
AIRMET vs SIGMET (context)
| Feature | AIRMET | SIGMET |
|---|---|---|
| Severity | Moderate | Severe |
| Primary impact | Light aircraft, VFR | All aircraft |
| Typical response | Caution / mitigation | Avoidance |
| Flight prohibition | No | Often yes |
Operational impact
An AIRMET may:
- Increase pilot workload
- Reduce comfort and safety margins
- Require altitude, route, or timing adjustments
Flights may still be conducted legally and safely with proper planning, aircraft capability, and pilot proficiency.
Application in DCS World
- DCS does not issue real AIRMETs
- Weather effects corresponding to AIRMET conditions (moderate turbulence, icing-like effects, reduced visibility) can be:
- Built into missions
- Simulated via weather settings
In training contexts:
- Instructors may declare “simulated AIRMET conditions”
- Cadets must evaluate whether to continue, modify, or delay a mission
Training focus
Cadets should learn to:
- Identify weather conditions that would trigger an AIRMET in the real world
- Adjust routes, altitudes, or mission timing accordingly
- Understand the difference between acceptable risk (AIRMET) and unacceptable risk (SIGMET)
An AIRMET doesn’t say “don’t fly”.
It says: “Fly smart.”