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Coastal fog refers to the occurrence of fog over coastal regions, usually occurring in spring and summer. It is also known as Haar and Fret in some parts of the UK. Coastal fog is a regular occurrence along the eastern coast of the UK and is most common during spring and summer. In eastern Scotland, it is known locally as Haar whilst in eastern ...
- What are the different types of fog? - Met Office
Evaporation fog can be one of the most localised forms of...
- 8 facts about fog - Met Office
It does, however, experience frequent fog which moves in...
- What are the different types of fog? - Met Office
- Radiation Fog
- Valley Fog
- Advection Fog
- Upslope Fog
- Evaporation Fog
Radiation fog usually occurs in the winter, aided by clear skies and calm conditions. The cooling of land overnight by thermal radiation cools the air close to the surface. This reduces the ability of the air to hold moisture, allowing condensation and fog to occur. Radiation fog usually dissipates soon after sunrise as the ground warms. An excepti...
Valley fog forms where cold dense air settles into the lower parts of a valley, condensing and forming fog. It is often the result of a temperature inversion, with warmer air passing above the valley. Valley fog is confined by local topography and can last for several days in calm conditions during the winter.
Advection fog occurs when moist, warm air passes over a colder surface and is cooled. A common example of this is when a warm front passes over an area with snow cover. It is also common at sea when moist tropical air moves over cooler waters. If the wind blows in the right direction, then sea fog can become transported over coastal land areas.
Upslope fog or hill fog forms when winds blow air up a slope (called orographic uplift). The air cools as it rises, allowing moisture in it to condense.
Evaporation fog is caused by cold air passing over warmer water or moist land. It often causes freezing fog, or sometimes frost. When some of the relatively warm water evaporates into low air layers, it warms the air, causing it to rise and mix with the cooler air that has passed over the surface. The warm, moist air cools as it mixes with the cold...
- Fog bow. As the name might suggest, a fog bow is a rainbow that appears in fog rather than during rainfall. They are fainter and slightly harder to see than rainbows, but you are more likely to see the complete circle of the optical effect.
- The foggiest place in the world. The title of foggiest place in the world goes to an area of the Atlantic Ocean called Grand Banks, lying off the coast of Newfoundland.
- Brewing in the desert. In desert areas where there is little rainfall, fog can serve as a valuable source of water. The Atacama Desert in Chile is one of the driest areas in the world.
- Hiding in the fog. On 27th August 1776, George Washington and his troops were fighting a losing battle against the British during the Battle of Long Island.
Aug 12, 2022 · Sea fret is a peculiar phenomenon which takes the edge off our warm summer days here in the North East – and it can be so thick and dark so as to appear like smoke. Officially known as "coastal fog" by weather experts, it is more commonly known as fret or sea fret here in the North East and other parts of eastern England, and is known as ...
Feb 6, 2020 · “In the UK, the most common occurrence of coastal fog is when warm air moves over the cool surface of the North Sea towards the east coast of the UK.” ... it is then called mist, the Met ...
Jun 16, 2023 · Haar, or ' sea fret ' as it is also known in North East England, is used to describe a cold fog that accumulates at sea, rather than on land. The most common form of coastal fog occurs when warmer ...
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Oct 7, 2020 · If the wind blows in the right direction, then fog can be transported over coastal land areas to form ‘coastal fog’, common along the eastern coast of the UK in spring and summer. It is known locally as Haar in eastern Scotland, whilst in Eastern Scotland and eastern England, the coastal fog is referred to as Fret. Evaporation fog
