Douglas Sherman
Staff
Today we will deal with the different types of fog.
Advection fog forms when warm moist air overrides a cool surface. This happens in the Midwest when there is snow on the ground and warm moist tropical air moves up from the south in the spring.
It also happens along the coast of California, Oregon, and Washington when warm moist air from the Pacific Ocean overrides the cool coastal California current.
Evaporation Fog forms when colder air overlies a warmer body of water. This is especially common during early fall when bodies of water still retain some of their summer heat and nighttime temperatures are much colder.
Radiation fog forms when the temperature of the air drops below the dew point. Colder air sinks into low places because of its higher density and thus this fog tends to be prominent in low lying places.
Upslope fog forms when warm moist air rises up the side of a mountain. It cools as it rises and eventually reaches the dew point and forms fog.
Finally, there are fog bows which are the equivalent of rainbows, but because the droplets are so small, they don't show the colors of a true rainbow. This fog bow occurred on the slope of Haleakala on the island of Maui.
You don't have to pile on with fog images. Please pile on with any cloud images you choose.
Advection fog forms when warm moist air overrides a cool surface. This happens in the Midwest when there is snow on the ground and warm moist tropical air moves up from the south in the spring.
It also happens along the coast of California, Oregon, and Washington when warm moist air from the Pacific Ocean overrides the cool coastal California current.
Evaporation Fog forms when colder air overlies a warmer body of water. This is especially common during early fall when bodies of water still retain some of their summer heat and nighttime temperatures are much colder.
Radiation fog forms when the temperature of the air drops below the dew point. Colder air sinks into low places because of its higher density and thus this fog tends to be prominent in low lying places.
Upslope fog forms when warm moist air rises up the side of a mountain. It cools as it rises and eventually reaches the dew point and forms fog.
Finally, there are fog bows which are the equivalent of rainbows, but because the droplets are so small, they don't show the colors of a true rainbow. This fog bow occurred on the slope of Haleakala on the island of Maui.
You don't have to pile on with fog images. Please pile on with any cloud images you choose.
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