Freezing fog: What is it and how does it form?

Did you notice the frost looking a little unusual, with a ‘spiky’ appearance this morning? That's because it wasn't your typical frost.

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The frost was created by fog, called ‘freezing fog.’ Freezing fog develops when the water droplets within the fog touch something that is below 32 degrees.

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The droplets immediately freeze on contact, with each droplet freezing upon the last. This creates a jagged or dagger appearance.

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While pretty to look at, this can be dangerous in winter as it could lead to slippery roads.