UK Autumn Highs Can Bring Fog and Grey Skies — SkimNews
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- Summer high-pressure systems over the UK usually mean fine weather.
- Colder-month high pressure can result in anticyclonic gloom, characterized by grey skies, mist and fog.
- Lack of wind leaves low cloud, mist and fog undispersed.
- Reduced sunlight in colder months burns off low cloud less effectively, helping anticyclonic gloom set in.
Why it matters: The practical change for UK weather planning is that a high-pressure system does not reliably bring clear conditions in colder months; weak winds and limited sunlight can leave grey skies, mist and fog in place rather than summer-style fine weather.
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