Black frost

Alternative definitions (2), class: vernacular (0)
Term: Black frost
Definition: Dry freeze, with respect to its effects on vegetation, which suffers internal freezing and has a blackened appearance.  WMOMeteoterm 

1. A dry freeze with respect to its effects upon vegetation, that is, the internal freezing of vegetation unaccompanied by the protective formation of hoarfrost. A black frost is always a killing frost, and its name derives from the resulting blackened appearance of affected vegetation. 2. Among some fishermen, a steam fog that extends above the bridge level of the fishing boats. If the steam fog does not reach this height, it is a white frost.  AMSglossary 

 GCW 
Created 2017.06.06
Last Modified 2022.03.08
Contributed by GCW Glossary
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