Met Eireann has issued a fog warning for across the country until Friday morning.

The orange weather alert was issued this evening and remains in effect until 11am.

The forecast for the evening is for fog to form inland as the night progresses, “becoming widespread and locally dense by dawn.”

Met Eireann warns that the “fog will clear only slowly in the morning. However, the afternoon and evening will be generally sunny.”

Tonight the RSA is urging road users to drive with care in heavy fog, switch on their dipped headlights to improve visibility, reduce their speed and keep a safe distance from the vehicle in front.