The TAF, MOS, Nearest TAF, and Nearest MOS forecasts selected to display on the Airports page are determined by choosing the closest station within an approximate 50 nm radius.
If an airport has a MOS station, you will see that listed as just 'MOS'.
Airport with an airport MOS forecast.
If a TAF is available for the selected airport, the airport's TAF will show.
Airport with TAF and MOS forecasts showing.
Finally, if an airport does not have either a TAF or MOS forecast, you will see an indication that the Nearest TAF or Nearest MOS is being displayed.
Airport with Nearest TAF and Nearest MOS forecasts showing.
There are more MOS stations than TAF stations, so you are more likely to see an airport MOS forecast than a TAF forecast.