Which fog is sometimes referred to as frontal fog?

Which fog is sometimes referred to as frontal fog?

• A. Precipitation Induced Fog
• B. Steam Fog
• C. Upslope Fog
• D. Ice Fog

Answer: (A)

Fog formed when rain evaporates into cool air near a frontal boundary is being tested here. When a warm front brings moist air and rain, raindrops falling into the cooler air near the surface evaporate and add moisture, saturating the air and producing fog. This precipitation-induced fog is often called frontal fog because it commonly occurs in the frontal zone of a weather system. Other types have different causes: steam fog forms when cold air passes over a warm water surface, upslope fog develops as air rises and cools while moving over terrain, and ice fog appears in very cold conditions when water vapor deposits as ice crystals. The precipitation-induced fog mechanism best fits the scenario described.

Fog formed when rain evaporates into cool air near a frontal boundary is being tested here. When a warm front brings moist air and rain, raindrops falling into the cooler air near the surface evaporate and add moisture, saturating the air and producing fog. This precipitation-induced fog is often called frontal fog because it commonly occurs in the frontal zone of a weather system. Other types have different causes: steam fog forms when cold air passes over a warm water surface, upslope fog develops as air rises and cools while moving over terrain, and ice fog appears in very cold conditions when water vapor deposits as ice crystals. The precipitation-induced fog mechanism best fits the scenario described.