off the top of my head I would say water temp.
Definitely not an expert, but just to talk fishing this is our approach for lakers on IR: on the south side what we look for – no surprise here – water temp, depth and speed. Above 55 temp if you can, 100-110 depth (set rigs and dipsys on the bottom, let your lead do the 60-70ft), 1.2 – 1.5mph. Clean spoons on everything, no flashers or dodgers for us on Isle Royale. Green/purple combo. Ideal conditions for wind we would look at 1-3 footers, mostly because it allows you to keep your line and speed fairly constant. Our set up is two down riggers, two lead and dipsys. I tell you what, dipsys are probably our most reliable fish puller when we can dial them in to bounce off the bottom a bit.
**I hear a lot of people are setting shallower for suspended lakers, 50-60 feet set, we don’t but if it works it works!