Unscheduled weather observations that meet special criteria are reported as which term?

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Multiple Choice

Unscheduled weather observations that meet special criteria are reported as which term?

Explanation:
The concept here is that when weather changes between routine observations in a way that could affect flight safety, a special weather observation is issued. That term is SPECI. METAR is the routine, regularly scheduled observation, while SPECI is specifically used for unscheduled reports that reflect a significant change from the last observation. AIRMETs and CWAs are advisory products, not the actual unscheduled observation. So when conditions change suddenly enough to warrant an immediate update, pilots and controllers rely on a SPECI.

The concept here is that when weather changes between routine observations in a way that could affect flight safety, a special weather observation is issued. That term is SPECI. METAR is the routine, regularly scheduled observation, while SPECI is specifically used for unscheduled reports that reflect a significant change from the last observation. AIRMETs and CWAs are advisory products, not the actual unscheduled observation. So when conditions change suddenly enough to warrant an immediate update, pilots and controllers rely on a SPECI.

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