@ai6yr you need a Joy Division & some unknown pleasures

@ai6yr For some, it's a sign of some conspiracy theory, I can't remember which one.

@CStamp @ai6yr chem trails!

(I like my joy division answer better)😅

@ai6yr gravity waves if I remember correctly (atmospheric waves, as opposed to gravitational waves which are, shall we say, a little trickier to detect).

@ai6yr "mackerel sky, mackerel sky, never long wet, never long dry"

@mxchara

Now *that* is interesting

Wikipedia has a good write-up on it, here

https://en.wikipedia.org/wiki/Mackerel_sky

cc @ai6yr

@FinchHaven @ai6yr yeah. whenever I see them I tell myself "weather's changing" and expect rain in a day or two, but I haven't made a systematic study.

@mxchara @FinchHaven @ai6yr I have learned to associate them with atypical humidity, at least in Southern California