What pressure change triggers a SPECI?

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Multiple Choice

What pressure change triggers a SPECI?

Explanation:
A SPECI is a special aviation weather report issued when there is a noticeable change in conditions since the last observation. The pressure criterion is a change of two hectopascals or more. So if the atmospheric pressure rises or falls by 2 hPa or more since the previous report, a SPECI should be issued. This threshold helps ensure pilots and air traffic control have up-to-date pressure data during rapid conditions changes. A change of 1 hPa is below the trigger, and no change would not prompt a SPECI. A change of 5 hPa does meet the criterion as well, since it is greater than 2 hPa.

A SPECI is a special aviation weather report issued when there is a noticeable change in conditions since the last observation. The pressure criterion is a change of two hectopascals or more. So if the atmospheric pressure rises or falls by 2 hPa or more since the previous report, a SPECI should be issued. This threshold helps ensure pilots and air traffic control have up-to-date pressure data during rapid conditions changes. A change of 1 hPa is below the trigger, and no change would not prompt a SPECI. A change of 5 hPa does meet the criterion as well, since it is greater than 2 hPa.

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