What is a characteristic of upslope fog?

Upslope fog is characterized by its persistence and the conditions under which it develops. This type of fog forms when moist air is pushed up a slope, such as a hillside or mountain, where it cools adiabatically, causing the moisture in the air to condense into tiny water droplets, forming fog. As this process occurs at higher altitudes, the moist air can remain as fog for extended periods, often for days, particularly in stable weather conditions.

The persistence of upslope fog makes it unique compared to other fog types, as it does not dissipate quickly with the sun and can linger until weather changes occur, such as shifts in temperature or wind patterns that might clear the air. This characteristic distinguishes upslope fog from other forms, which may have different formation processes and durations.