It's in force between 5pm and midnight on Monday.
Exeter's Met Office has just issued the warning.
After a foggy start to the morning, it cleared to leave blue skies and sunshine, but the fog will return later.
The warning comes into force at 5pm (Monday 30th December) and stays in place until midnight.
It says to expect:
Latest updates from the Met Office here.
Controversial Exmouth Devoncourt Hotel planning decision delayed
Planning committee voted for a site visit before making a decision
New bacteria ‘threat’ detected in River Teign
Swimmers advised to wear caps & earplugs
What a waste! 5,000 recycling boxes replaced
It's someone's full time job
New app makes crime reporting easy
Log anything without speaking to anyone
Knife scanner deployed at under-18s event
Police educate youngsters
No to Torquay seafront big wheel this summer?
Planners recommended to say no after 12 years
