Final answer:
AUTO refers to Automatic weather reporting. CCA and CCB are used to indicate the presence of significant weather features, such as hurricanes or tropical storms.
Step-by-step explanation:
In the context of a METAR report, AUTO stands for Automatic weather reporting. It indicates that the weather observation is obtained automatically without human intervention. CCA and CCB refer to Center of Circulation A and Center of Circulation B, respectively. These are used to indicate the presence of significant weather features, such as hurricanes or tropical storms, in a specific area.