What type of fog typically occurs from 1530 until sunrise?

Radiation fog typically forms during the night and into the early morning hours, especially after a clear night when the ground loses heat through radiation. This cooling effect can lead to the condensation of moisture in the air near the surface, producing fog that is most prevalent during the hours from late afternoon (around 1530) until sunrise. The radiative cooling of the Earth's surface becomes effective, allowing the air temperature to drop to the dew point, and thus creating conditions ideal for fog formation.

In contrast, advection fog arises when warm, moist air moves over cooler surfaces and loses heat, leading to condensation. Sea fog occurs over oceanic areas and is caused by the interaction of warm air over cooler sea waters. Upslope fog forms when moist air is lifted over terrain, cooling as it rises. Neither of these types of fog typically takes place predominantly in the time frame from 1530 until sunrise, making radiation fog the most fitting answer for this specific question.