In the scope statement it is mentioned there is a strong possibility of a hurricane impacting the schedule at any given time. This notation would be considered a(n):

An assumption is a factor in planning that is considered to be true, real, or certain without proof, not an uncertain event.

An issue is a problem or concern that is already happening or has happened, requiring immediate attention, unlike a potential future event.

A constraint is a limiting factor or restriction that affects the execution of the project, such as budget or time, not an uncertain event that might impact the schedule.

A risk is an uncertain event or condition that, if it occurs, will have a positive or negative effect on one or more project objectives, such as schedule. The potential for a hurricane to impact the schedule is a classic example of a project risk.