here are old-timers in the Imperial Valley who will tell you that Sept. 8-16 (or thereabouts) is when the west winds arrive to signal a change in the weather. There are others who insist the window of time is much shorter than that, and the actual start date is Sept. 12 (give or take a day or two, either way).
The late Virginia Horn was a member of the latter group; in fact, we always suspected she was its de facto leader, mainly because she wrote about the supposed phenomenon every year in this newspaper, most often in late August or early September.
So, depending on who is right, we are either a day into the annual westerly window, or it is still three days off. In any event, no matter when they actually show up, the west winds are coming, and they bring with them the prospect of happier and cooler days ahead.