Reported by BBC Science
Thick fog has formed on Friday morning across parts of the United Kingdom which could lead to hazardous driving conditions.
The Met Office has issued a yellow severe weather warning for fog from Lincolnshire, the East Midlands, the Home Counties into parts of Greater London.
Fog will be dense in places with visibility below 100 metres at times and it will be most extensive and disruptive during the morning rush hour.
More from the original report
It will slowly begin to thin, lift and clear later this morning but in some rural spots in eastern England it may not clear until this afternoon.
Met Office severe weather warning for fog issued on Friday morning
Early morning mist and fog patches on Saturday may lift into low cloud, which could hang around all day.
Some areas will fare better with some spells of sunshine with many areas staying dry.
The exception to this theme will be north-west Scotland, where a weak weather front will bring thicker cloud and rain for a time.
Temperatures will be close to average and will be overall, similar to recent days.
By Sunday this dying weather front will bring some thicker cloud to Wales and central England threatening a few patches of light rain or drizzle, but not much.
The rest of the UK will have a dry day on Sunday with variable cloud and some spells of sunshine at times.
With drier weather people will should be able to get out and enjoy the autumn colours
High pressure has been building and is set to dominate across the UK in the coming days.
This is in stark contrast to last week which saw areas buffeted by a cluster of storms developed by a powerful Atlantic jet stream.
The jet stream, still running close to the UK, with the building area of high pressure bringing us much quieter weather.
Whilst Storms Austen and Boelo provided some short-term hydrological benefit, 82% of England remains in drought status according to the Environment Agency.
The area of high pressure will stay over or close to the UK for at least ten days as a…