FAA Ground School Practice Test

What is the expected trend for visibility at KMEM if it is forecast to be 3 SM between 1000Z and 1200Z?

1. Improving

2. Degrading

3. No significant change

4. Shifting to fog

The correct answer is: No significant change

When visibility is forecasted to be 3 statute miles (SM) between 1000Z and 1200Z at KMEM, this indicates that the expected visibility will remain consistent throughout that time period. A visibility forecast telling us it's holding steady at 3 SM suggests that there are no significant weather events anticipated that would impact the clarity of the air, such as precipitation or dense fog. While factors such as changing atmospheric conditions could affect visibility, the specific forecast here does not indicate any changes; it simply states that visibility will remain stable. This means pilots and other stakeholders can plan accordingly, knowing that visibility won't significantly improve or degrade during the forecasted time span. Thus, selecting the option indicating no significant change appropriately reflects the expected outcome in this scenario.