![]() ![]() In Florida, advection fog occurs when warm, moist air. The air is cooled to saturation by the cold from the ground below. This type of fog is called ice fog and is less hazardous than freezing fog due to the fact that the ice crystals do not glaze surfaces with a layer of ice. Advection fog forms as warmer, more humid air moves over a colder ground. ![]() Advection fog is common over coastal regions where the ocean is significantly cooler than the surrounding land. It is common at sea whenever cold and warm ocean currents are in close proximity and may affect adjacent coasts. The surface cools the air to the dewpoint, resulting in fog. Advection fog is formed by the slow passage of relatively warm, moist, stable air over a colder wet surface. If temperatures are below -20 degrees Fahrenheit, fog is often composed of ice crystals instead of supercooled water droplets. Advection fog forms when relatively warm, moist air advects (moves) over a cooler surface. It can quickly glaze a thin layer of black ice over roadways and runways, turning them into an ice rink within a matter of seconds, When temperatures are below freezing and fog rolls in, it’s best to stop driving and wait for the road to clear up. It occurs when the temperature is below freezing but the cloud droplets remain in a liquid state, rendering them supercooled.įreezing fog is by far the most dangerous type of fog. Freezing fog is a subtype of other types of fog – most often radiation fog or upslope fog. ![]()
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