Between 1000Z and 1200Z the visibility at KMEM is forecast to be

• A. 1/2 Statute Mile
• B. 3 Statute Miles
• C. 6 Statute Miles
• D. 10 Statute Miles

Answer: (B)

Forecasted visibility for a specific time window is shown in the TAF and tells you the prevailing visibility to expect during that period. For KMEM, the forecast between 1000Z and 1200Z is 3 statute miles, so you should plan for visibility of about 3 miles during that time. This sits in the normal VFR range, not extremely poor or exceptionally clear. A much lower value (like 1/2 mile) would indicate IFR conditions, while values of 6 or 10 miles would indicate unusually clear conditions. If the forecast included changes within that window, you’d see TEMPO or similar groups to signal temporary shifts, but the overall expectation for that period is 3 miles.