In the Pensacola region, fog is the most prevalent deterrent to flight operations. Fog can occur during any month of the year, but it is most likely to occur and most hazardous during the winter months. It reduces the visibility to less than 1/2 mile more than 2% of the time from November through April.  The greatest frequency of visibility reduction due to fog is during January, February, and March, with a maximum of 5.9% visibility reduction in January.  KNPA is affected by frontal fog, advection fog, and radiation fog, all of which reduce visibility on and around the field.
Concept Mapping Toolkit
Insitute for Human and Machine Cognition
The University of West Florida