What is one reason that could disqualify an airport for being an alternate?

An airport can be disqualified as an alternate if the forecast winds are below the aircraft’s limits. This condition is critical because it directly impacts the safety and performance of the aircraft during landing and take-off procedures. If the wind conditions are predicted to exceed what the aircraft can safely handle, it may not be possible to operate safely at that airport. Regulatory guidance specifies that alternate airports should have weather conditions suitable for aircraft operations, including wind speed constraints.

In contrast, if all runways meet safety standards, that indicates the airport is maintained to a level that promotes safe operations, which is a positive factor, not a disqualifier. Having extensive services, such as fueling or maintenance, enhances the airport's utility for diversions or emergencies but does not inherently limit its qualification as an alternate. The presence of active flight routes nearby may complicate operations slightly but does not disqualify an airport for use as an alternate in the context of safety and regulatory requirements.