I think 37 kt (43 mph) winds qualify as "windy."
No one I've asked can remember a more beautiful autumn than the one we've had in Chicago this year. Until yesterday, we haven't had much wind or rain, so the trees have kept most of their orange and yellow halos for weeks.
Mornings have been particularly lovely. The low sun has hit the flaming yellow lindens and maples just so, making our daily walk to the El a delight. Or anyway, as much as a walk to the El can be, I guess.
Since last night, though, we've had steady 25 kt (29 mph) winds with gusts up into the 40s, blowing the leaves off everything in sight. Nary an elm has leaves this morning; the maples are spotty; and only our neighbor's stubborn linden, which only reluctantly has admitted that November is no time to leave the clorophyll out there, seems to be hanging on.
This is one of those days when my flight instructor, Zoltan, would look up at the total absence of planes flying the pattern and remark, "It mights gonna to be a bit vindy today, ja."
(You can watch the leaves blow around Evanston on the Inner Drive webcam.)