Speaking of winds again, your first thought would be that the odds of encountering a tailwind are the same as for a crosswind or a headwind... but they're NOT!
For example, when I venture out of town, I typically go due West, and I typically go in the afternoon or evening. The prevailing winds are out of the NW. So, I get to fight quartering headwinds almost every time. OK, so you think, oh well, I sort of get to make up for that penalty with quartering tailwinds on the way back... NOT SO! Because after the sun goes down, oftentimes the winds die down too. For me it's a net loss situation. Someone who had the opposite route from mine would have the luxury of more often than not getting tailwinds!
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