Haar (fog)

It occurs most often on the east coast of Scotland between April and September, when warm air passes over the cold North Sea.

Sea breezes and easterly winds then bring the haar into the east coast of Scotland and North-East England where it can continue for several miles inland.

The term haar is used along certain lands bordering the North Sea, primarily eastern Scotland[6] and the north-east of England.

Variants of the term in Scots and northern English include har, hare, harl, harr and hoar.

Its origin is related to Middle Dutch haren, referring to a cold, sharp wind.

Haar rolls into the Firth of Forth, partially shrouding the Forth Bridge .
Haar rolling in over the Forth Bridge