What does squally mean? (From Dickens' Great Expectations)

To be squally is to be troubling or disturbing.

As she applied herself to set the tea-things, Joe peeped down at me over his leg, as if he were mentally casting me and himself up, and calculating what kind of pair we practically should make, under the grievous circumstances foreshadowed. After that, he sat feeling his right-side flaxen curls and whisker, and following Mrs Joe about with his blue eyes, as his manner always was at squally times.

From Dickens' Great Expectations.