"Joe Egginton" wrote in message
...
Why is it that when the temperature is at 0c, it says fog instead of
freezing fog?

Just because the temperature falls below the melting point of water it does
not mean that fog magically turns into freezing fog. Freezing fog is *NOT*
fog with a temperature below zero, despite what some say. For fog to be
freezing fog it has to be depositing rime. I have had this argument before,
as a professional observer many years ago in still air we had a fog with a
temperature just below zero, I was told off for not calling it freezing fog,
but I stood my ground as all surfaces were wet despite the temperature, in
no way was it rime icing.

Will
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