Aviation Routine Weather Report (METAR)

Definitions

• Observation of current surface weather reported in a standard international format.
• In weather, an acronym for Aviation Routine Weather Report, which is an observation of current surface reported in the standard international format. Routine METARs are transmitted hourly; there is a special report (as indicated by the acronym “SPECI”) that may be issued at any time for rapidly changing weather conditions.

References

• Balloon Flying Handbook, Federal Aviation Administration, 2024
• Pilot's Handbook of Aeronautical Knowledge, Federal Aviation Administration, 2023