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Up-slope fog or hill fog forms when winds blow air up a slope (called orographic lift), adiabatically cooling it as it rises and causing the moisture in it to condense. This often causes freezing fog on mountaintops, where the cloud ceiling would not otherwise be low enough. Valley fog forms in mountain valleys, often during winter. It is ...
With sufficient humidity in the cooler layer, fog is typically present below the inversion cap. An inversion is also produced whenever radiation from the surface of the earth exceeds the amount of radiation received from the sun, which commonly occurs at night, or during the winter when the sun is very low in the sky.
Tule fog is a radiation fog, which condenses when there is a high relative humidity (typically after a heavy rain), calm winds, and rapid cooling during the night. The nights are longer in the winter months, which allows an extended period of ground cooling, and thereby a pronounced temperature inversion at a low altitude.
Orographic fog is formed as the air rises up the slope and will often envelope the summit. When the air is humid, some of the moisture will fall on the windward slope and on the summit of the mountain. When wind is strong, a banner cloud is formed downwind of the upper slopes of
Here, the falling air is warming adiabatically, and so the fog re-evaporates as it falls. [ citation needed ] Katabatic wind in Antarctica A katabatic wind (named from Ancient Greek κατάβασις ( katábasis ) 'descent') is a downslope wind caused by the flow of an elevated, high-density air mass into a lower-density air mass below under ...
Patchy fog after 1 p.m. with calm wind becoming southeast around 5 mph. Cloudy atmosphere continues through the night with a low around 29°F. Areas of freezing fog between 1 a.m. and 2 a.m. North ...
What causes fog? Fog is essentially "a cloud at the ground," Boxell said. For fog to form, the air needs to be saturated, meaning it's holding the maximum amount of moisture possible, so ...
Mist can be as high as mountain tops when extreme temperatures are low and strong condensation occurs. Freezing mist is similar to freezing fog , only the density is less and the visibility greater. When fog falls below 0°C, it is known as freezing fog, however it still stays suspended.