Originally Posted by
Bucknut
Understanding how ... these things work is important when the fog is worse than forecasted and you are in a holding pattern making an informed decision about whether to continue to hold or divert.
So you develop your own idea as to the time of fog clearance.
I should have thought that the forecaster should tell you upon request, or amend his TAF / METAR Trend if things turn out worse than initially forecasted? Don't they do that, or is it easier to produce your own forecast?
Grille