I stumbled on a site with wind rose data and thought I'd share. You can download wind roses from http://www.wcc.nrcs.usda.gov/ftpref/downloads/climate/windrose/
. An explanation of the data is at http://www.wcc.nrcs.usda.gov/climate/windrose.html
. If you're not familiar with wind roses, they show a number of colored rays emanating from the center. The length of the ray shows the likelihood that the wind will blow FROM that direction. The colors of the ray show the likely wind intensity when coming from said direction. For my planned W-E transit of Kansas in September, I see that I'm fairly likely to face a moderate headwind, very likely to ride in stiff crosswinds, and will probably never see a tailwind. From my initial perusal of data along the TA, I would reverse the direction of my trip to E-W were there not logistical considerations. I can't change the wind, but I can at least get psyched for it. After a tour or two I realized that if I didn't like headwinds and hills I would need to find another hobby.