What are the minimum weather conditions for an airport to be listed as an alternate on an IFR flight plan when it has an approved instrument approach?

For an airport to be designated as an alternate in an IFR (Instrument Flight Rules) flight plan when it has an approved instrument approach, specific minimum weather conditions must be met, depending on whether the approach is precision or nonprecision.

In this case, the correct choice states that the minimum weather conditions for a nonprecision approach at an alternate airport are a ceiling of 800 feet and visibility of 2 statute miles (SM). This requirement aligns with the regulations set forth by the FAA, which stipulate that if the approach procedure is nonprecision, the ceiling must be at least 800 feet, and the visibility must be at least 2 SM. This ensures that pilots have adequate conditions to execute the approach safely, reducing the risk of encountering unexpected weather conditions upon arrival.

The other choices provide conditions that do not meet the established criteria for a nonprecision approach at an alternate airport or incorrectly specify requirements for precision approaches, which are not applicable in this context. Understanding these minimums is crucial for flight planning and safety during IFR operations.