• Fri. May 20th, 2022

M5 and M4 weather warning this morning for parts of Wales and South West England

The Met Office has issued a yellow weather warning for fog in South Wales and South West England for this morning.

The alert was issued from 5 a.m. to 11 a.m. for heavy fog, mainly over the hills and near the south coast. It covers large sections of the M5 and M4 and other main roads.

The latest weather and traffic news for Wales can be found here.

In an alert issued at 3.47am this morning, the Met Office said: “Very humid air, associated with a slowly northward moving frontal system, is arriving in southwestern parts of the UK.

“As the clouds above thin out and the rain subsides, this will allow a period of thick low cloud and fog to continue to develop, settling on the hills and extending northward with visibilities below 50 m in some places.

“The fog is expected to gradually change to low cloud this morning with visibility slowly improving.”

The national meteorologist said conditions can make driving dangerous in some places and there is a risk of flight delays.

Areas likely to be affected

The Met Office advises:

  • Avoid travel if possible.
  • Drive very slowly with the dipped beam headlights on, the main beam headlights are reflected on the fog causing a “white wall” effect.
  • Watch your speed, fog can give the illusion of slow motion.
  • Use the fog lights, but remember to turn them off when visibility improves.
  • Don’t hang on to the taillights of the car in front of you, taillights can give a false sense of security.
  • Beware of freezing fog, which is made up of water droplets that freeze on contact with objects such as the sidewalk, road, car, etc. It can quickly form a layer of ice.

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