From reading definitions I guess a "Westerly" wind could mean ether from the west or towards the west. As a logical person this annoys me to no end.
Overall I agree with you that the wind should be flipped 180 degrees. Thanks for pointing that out.
I actually like this better as it bodes well for a more prosperous city in my future potential Chicago source book. Well to those who are to the east of me enjoy the extra fallout