Got a story? Please email or WhatsApp 07580 255582. When droplets from freezing fog freeze onto surfaces, a white deposit of feathery ice crystals is formed. Tiny water droplets in the air become supercooled but remain liquid as they need a surface to freeze on. Freezing fog forms in the same way as normal fog but occurs when temperatures go sub zero. Tyre maker Continental advises reducing speed and increasing braking distance, using fog lights or low beams, and being prepared to pull over if things get too bad.Īnother type of fog also threatens to be a deadly combo. Reduced visibility is bad for drivers too. British Airways cancelled 15 departures from Heathrow and there were another six cancellations at London City Airport. On Monday, Heathrow Airport said poor visibility meant it was operating with a reduced rate of planes taking off and landing. Fog forms best with clear skies as they allow the temperature to drop more easily as heat escapes the surface, helping reach that crucial 'fog point'.įog can be a pain for drivers, aviators, and mariners. But, don't be fooled into thinking you need clouds to make fog. ![]() ![]() The River Thames will also have contributed to Monday's fog, with it forming more easily around water.
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