[MarkofSeaLife]

I just took a couple of photos showing a mixed sky that we have right now as theres a developing bad blob just east of us, heading north but going to give us some squalls and stuff.

The reason I post it is for newer cruisers. I have a rule never to leave port on a "mixed sky". Its where you can see clouds at all three levels, low, mid and high.
Most of the sky here is pretty blue and doesnt look too bad at all for a sail or a day hop, or even a passage... But....

(Sorry for the large photos but I wanted the detail to stand out)

 

[MarkofSeaLife]

This particular one is brushing past and we may not get much at all. But the point is I wouldnt sail under those skys because then they are like that anthiny can happen and its unlikely to be nice

 

[MarkofSeaLife]

'mixed sky', never heard the term.

Can also be called "Chaotic sky". In my American book "Weather for the Mariner" Admiral William Kotsch uses it so it may be the more accepted term in the USA.
He says: "small boatmen should avoid by putting into port -- or not leaving port" p67, 3rd Edition.