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air frost
noun
- the deposition of ice condensed from water vapour in the atmosphere on the surface when the air temperature is below 0°C
Example Sentences
In England it would represent the earliest air frost in five years, and in Northern Ireland the earliest in six.
If a weather station in Wales drops below 0C it will be the earliest air frost since 1996.
As winds fall lighter overnight it is even possible that Friday morning could start with an air frost - where temperatures drop below freezing.
Nick Wenman, founder and owner of Albury Organic Vineyard in Surrey, said it was the air frost that was particularly damaging, with three bad nights last week - the worst being the night of 26 April.
The air frost that hit last week caused "catastrophic" damage to buds that had bloomed earlier than usual thanks to a warm start to the year.
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