The
met data does show the trend toward fog
It does eventually but if you look at the 2130 SPECI with MIFG they then state NOSIG which is supposed to be a statement of trend for the next 3 hours even though leading up to it the temp and the dew point are 05/05.
At 2200 the penny finally drops and they start trending FG.
Forecasts should be just that and not akin to Monday morning football discussion.