Which of the following is NOT a criterion for releasing a SPECI?

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Multiple Choice

Which of the following is NOT a criterion for releasing a SPECI?

Explanation:
A SPECI is issued when there’s a significant weather change that could affect aircraft operations between routine METAR updates. Humidity by itself doesn’t usually signal an immediate operational hazard, so it isn’t used as a trigger to release a SPECI. In contrast, changes in wind direction can imply shifts in wind patterns that affect takeoffs, landings, or wind shear; wind gusts can pose control and performance challenges; and a noticeable pressure change (pressure tendency) often accompanies evolving weather systems and can precede rapid changes in visibility, precipitation, or cloud conditions. Because those factors directly impact safety and planning, they are valid SPECI triggers, whereas humidity is not.

A SPECI is issued when there’s a significant weather change that could affect aircraft operations between routine METAR updates. Humidity by itself doesn’t usually signal an immediate operational hazard, so it isn’t used as a trigger to release a SPECI. In contrast, changes in wind direction can imply shifts in wind patterns that affect takeoffs, landings, or wind shear; wind gusts can pose control and performance challenges; and a noticeable pressure change (pressure tendency) often accompanies evolving weather systems and can precede rapid changes in visibility, precipitation, or cloud conditions. Because those factors directly impact safety and planning, they are valid SPECI triggers, whereas humidity is not.

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