The Met Office has issued a second yellow weather warning for fog, covering six counties in Northern Ireland, after an earlier alert was published for parts of England.
The first warning for fog was issued earlier on Sunday (November 8), beginning at 6pm. It covers south east England, East Anglia, the Midlands, and parts of Yorkshire, and runs until 11am on Monday (November 9).
At around 10:00pm on Sunday night, the Met Office published a second yellow weather warning for fog. This alert covers the western portion of Northern Ireland, including Derry, Enniskillen, and Newry, and is in place until 10am on Monday.
Travel disruption expected
The Met Office warned: "Fog patches forming overnight and into Monday morning, may lead to disruption to travel."
"Slower journey times with delays to bus and train services possible. There is a chance of delays or cancellations to flights," the warning added.
It warned of similar impacts for the English fog warning. Visibility is likely to be less than 100 metres in parts, but the fog should lift by lunchtime on Monday.
Advice for affected areas
The advice for the millions of people living under the weather warning is the same on either side of the Irish Sea.
Experts added: "Give yourself the best chance of avoiding delays by checking road conditions if driving, leaving extra journey time, or amending plans if necessary."
"Make sure you know how to switch on your fog lights, and check they are working before setting off on your journey. Bus and train services, as well as flights and ferry travel may also be affected; check for updates from your travel company and follow their advice."
"Be prepared for weather warnings to change: when a weather warning is issued, the Met Office recommends staying up to date with the weather forecast in your area."
Full list of affected counties
The full list of counties affected by the yellow weather warning in Northern Ireland are:
- County Antrim
- County Armagh
- County Down
- County Fermanagh
- County Londonderry
- County Tyrone
