This is why a heavy fog has descended on Leeds and this is when it will clear
The Met Office explain that fog is caused by tiny water droplets suspended in the air, with the thickest fogs tending to occur in industrial areas where there are many pollution particles on which water droplets can grow.
According to the Met Office, “Fog is essentially a cloud at ground level that causes a reduction in visibility to less than 1000 m.
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Hide Ad“However, for most people, thick fog is when visibility drops below 180 m. Severe disruption to transport occurs when the visibility falls below 50 m over a wide area. This is referred to as dense fog.”
When will it clear?