Every pilot certificate and every rating you pursue will have a weather learning component to it. One of the most important concepts you cover is about clouds—how they are classified and formed and what their appearance means in terms of atmospheric stability.
I live in the Pacific Northwest, where fog—the lowest of the low clouds—is a nearly daily occurrence, especially in the fall and winter. I live close to the water, and on some days it never lifts. Other days, we get a few hours of flyable sunshine and visibility, and we watch the temperature and dewpoint spread very carefully because fog can sneak up on you ninja-like. And if you are not instrument rated and in an instrument-capable aircraft, instrument current, instrument proficient, and prepared to “go on the gauges,” you may have a really bad day. Know your enemy, as my father used to say.
