Met Office fog warning covers parts of England until 11am

The Met Office’s yellow fog warning covered parts of England through 11am Monday, with visibility potentially falling to 50 metres or less and travel delays possible. The warning area stretched from York to Bath and included much of southeast and eastern England.

The Met Office warned that fog could make journeys slower, with possible delays to bus and train services and delays or cancellations to flights. The warning was in force from 6pm Sunday. No figures were provided for actual travel disruption during the warning period.

Met Office operational meteorologist Niamh Murray said light winds, clear skies and long autumn nights were allowing fog to develop. Longer periods of overnight cooling bring temperatures closer to the point at which air becomes saturated and fog forms, she said. Where temperatures fall below zero, fog can be slow to clear the following day.

The warning identified the possibility of patchy fog beyond its main area, although it was expected to be less dense and less disruptive. Rural parts of the Midlands, Wales and East Anglia could see persistent fog overnight into Monday, with temperatures approaching freezing and possible air frost.