20+ MPH, I'd rather just drive around sight seeing, sipping coffee and smoking a cigar.
15-20 MPH, if I'm out there to hunt, I'll hunt (at least some), but I know it's not going to be a banner day.
Mostly quick hitters or nothing on days like that. Sound isn't getting out very far anywhere but downwind, noise makes it easier to setup on top of them. I tend toward even shorter than usual stands when it's blowing like that because my experience has been you are mostly only going to get the ones you setup right on top of and they are mostly going to come in immediately. Rare, for me, to get anything after about 4 minutes in 15+ MPH wind.
I, personally, have got to the point I just avoid hunting the thick stuff in that kind of wind, unless that's all there is. My personal experience, they circle for a taste pretty consistently when it's blowing hard, tending to do so earlier and further out than more calm conditions. And in cover, mostly all I get is a few flashes through the brush as they buzz the tower downwind. I'm sure many more use that cover to taste the breeze that I never see. So, my strong preference, call stands that are not heavy cover, where I can at least see downwind. And expect most coyotes to either show up there - because that is where the sound is mostly going, or to head there, because for whatever reason they seem much more likely to circle for the wind further out on days it's blowing. I like calm mornings for getting into the thick stuff.
Wind days are good days to go see what is over the next hill that you always wondered about. I often to refer to the wind as Anasazi, my ancient enemy. Been howling wind almost every day I've been out so far this year, too, unfortunately.
- DAA