Brough

[…] about the moon , called a brough, stormy weather is looked for within twenty-four hours; hence it is said, "a far off brough and a near hand storm." If small floating white clouds appear, which are called cat hair, rain is[…]

The corona or brough occurs when the sun or moon is seen through a thin cirro-stratus cloud, the portion of the cloud more immediately around the sun or moon appearing much lighter than the rest.

The County Antrim farmers say that bad weather may be expected whenever the new moon appears "on her back, with the new moon in her arms, and a brough round her," meaning by this the appearance[…]

Swainson, in his Weather Folklore, quotes: About the moon there is a brough, The weather will be cauld and rough.

... broughs which appeared around the moon […]