BikerBoy from Maryville, IL on 4/20/2021 9:32:36 AM:
The "prevailing Westerlies" are trade winds in the Northern Hemisphere which are most predictable out in the ocean. The trade ships with sails could mostly depend on the winds to carry them to the East (and opposite in the Southern Hemisphere). However, on land, all that changes as the geography and climate play a much larger role in wind direction and speed. Wind is so locally variable that you cannot put a wind farm just anywhere.
Even within just Missouri, the most prevalent wind direction is different in KC (SW) than STL (SSE). But if you had to generalize wind on the Katy, it's from the South most of the year, thanks to the Gulf of Mexico. But when that South wind hits the river bluffs, it goes in all directions. On a windy day, it's not unusual to have the wind at your back one minute, and then have it hit you full in the face the next. So, I tell people to not count on the wind as a help or a harm, but to plan an extra "weather day" into your trip to account for wind, rain, cold, etc.