Text forecasts from the Met Office

What’s the difference between “for many” and “for most”? And when is a “sharp frost” not a “sharp frost” ?

Severity of fog

The official definition of fog is a visibility of less than 1,000 m. This limit is appropriate for aviation purposes, but for the general public and motorists an upper limit of 200 m is more realistic. …

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Severity of frost

Frost occurs when the temperature of the air in contact with the ground, or at thermometer-screen level, is below the freezing-point of water (‘ground frost’ or ‘air frost’, respectively). The term is also used of the …

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