Quote:
Originally Posted by marc4darkskies
... I overlaid surface winds with jet-stream maps and that seemed OK. That is, low surface winds plus low jet-stream winds = good seeing (on two nights). I haven't tried this often enough to be sure it's a reasonable measure though but so far so good. I imagine it's not that simple though.
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+1

I used the same technique for the SPSP2016 and it worked beautifully for me too. Seeing is probably depending on a whole lot more factors including local conditions but this overlay does the job to at least give you a good 'maybe' and certainly a strong 'no-no' when both wind vectors are too long.