The forecaster warns that it will be most dense inland, "leading to poor driving conditions".
As for the rest of the day Met Eireann warn that the fog will linger in many parts of the country, and the day will remain cloudy and misty with little sun breaking through.
"Radiation fogs usually dissipate soon after sunrise as the ground warms".
Mr Wilson said: "There is a lot of radiation fog around at the moment".
Met Éireann have extended their Status Orange fog warning for the entire country until 12 noon today as the dense fog affecting many areas is slow to lift.
Travel delays on roads are possible and there is also the possibility of pwer cuts during the worst of the conditions.
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Speaking in the Diary Room, she said: "I think these early outbursts have cost me". She added: 'Obviously, it's good to explore a little bit but it's much better.
He said: "It happens when you get clear skies and it cools down and you get fog patches forming out of these skies".
Regions most at risk will be London and the southeast; northwest England; southwest England Wales and the West Midlands. Afternoon temperatures will range from 5 to 9 degrees Celsius, coldest in the north.
"Now we have ideal conditions for widespread fog across the country, particularly, for some southern areas, where it could linger for some lengthy periods from tonight".
"This reduces the ability of the air to hold moisture, allowing condensation and fog to occur".
WeatherOnline forecaster Simon Keeling added: "Further spells of drizzle here expected for the far northeast of Scotland tonight".