Which option describes the SPECI temperature threshold?

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Multiple Choice

Which option describes the SPECI temperature threshold?

Explanation:
A SPECI is issued when weather changes between routine observations reach a level that could affect flight operations. For temperature, the threshold is a change of five degrees or more since the last report. This 5°C change is considered significant enough to alert pilots and controllers to potential impacts on aircraft performance, icing risk, or other weather-sensitive factors, while avoiding too many updates from minor fluctuations. A smaller change, like one degree, wouldn’t typically trigger a SPECI, and the five-degree rule is the established criterion (ten degrees would also meet that same threshold, since it’s “five degrees or more,” but the key point is that five degrees is the defined limit).

A SPECI is issued when weather changes between routine observations reach a level that could affect flight operations. For temperature, the threshold is a change of five degrees or more since the last report. This 5°C change is considered significant enough to alert pilots and controllers to potential impacts on aircraft performance, icing risk, or other weather-sensitive factors, while avoiding too many updates from minor fluctuations. A smaller change, like one degree, wouldn’t typically trigger a SPECI, and the five-degree rule is the established criterion (ten degrees would also meet that same threshold, since it’s “five degrees or more,” but the key point is that five degrees is the defined limit).

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