Under which condition does Alarm Yellow indicate an attack is probable?

Alarm Yellow indicates that an air attack is probable when there is less than 30 minutes before an anticipated attack. This condition is critical for readiness, allowing units to prepare their defensive measures and ensure personnel are alert to respond effectively to the emerging threat. The specific time frame of less than 30 minutes signifies a heightened state of awareness and enables timely action to mitigate potential impacts from the attack. This understanding is essential for service members to maintain operational readiness and to act swiftly as situations evolve.