Met Éireann has issued a nationwide status yellow fog warning.
The alert is now in effect, with fog set to be dense in places, leading to hazardous driving conditions.
It is set to remain valid until 10am tomorrow.
Status Yellow - Fog warning for Ireland
Dense fog in many areas.Valid: 4 p.m. today (Friday) until 10 a.m. tomorrow (Saturday) pic.twitter.com/vZS3vIBhvW
— Met Éireann (@MetEireann) December 20, 2019