Here is the science simplified:
A fog map is a type of weather map that specifically highlights areas where fog is present or expected to develop. These maps use various symbols, colors, and notations to indicate the intensity, duration, and location of fog. In the case of Nova Scotia, the fog map is an essential tool for mariners, pilots, and anyone who needs to navigate the province's roads or coastal waters. fog map nova scotia
Nova Scotia is one of the foggiest regions in Canada, largely due to its geography where the warm Gulf Stream meets the cold Labrador Current Here is the science simplified: A fog map
Environment Canada’s weather radar cannot "see" fog directly, but it shows precipitation. Fog often precedes drizzle. Ceilometers (cloud height sensors) at airports like Halifax Stanfield (YHZ) and Sydney (YQY) provide real-time vertical visibility. Nova Scotia is one of the foggiest regions
This is why you can drive from bright sunshine inland into a "wall of white" the moment you hit the coast.