Southern Dialect: Word for a time of day when quick cooling happens?

I remember reading a story somewhere that a Southerner wrote about one of his life experiences. He mentioned that in the region he lived there was a time of day that cooled off a large amount in less than ten minutes, and the effect was so remarkable that they had a word for it.

I'm writing something now, and am looking for that word and the region to which it applies. I searched for the article and could not find it. I searched for regional words relating to times of the day, and still could not find it. I have no idea where I would look for such a thing (I've never found it in any of the web sites claiming to have 'accurate' information on the Southern dialect). Does anybody know the word I am looking for, or an information source in which I might be able to find it?

I can tell you what happens in Arkansas, which can be similar to Texas.

The wide stretches of Arkansas prairie (west of the White River bottom (Des Arc, Hazen, Stuttgart, Arkansas)), when under a baking sun, does become hot as a frying pan. Creeks do spread through the prairie. The creeks are a low spot and will have big trees. They hold the shade and the cool temperatures.

When the sun starts to set, the temperatures quickly try to equalize and the cooler air rushes out. The same thing happens in the wide-open fields of the Mississippi delta, if you are near a broad tree line with a creek. The breeze will be so stiff that it will blow your hair, move your clothes and send you running after your hat. It is a sudden cool-off and the wind will moan around my Grandmother's house.

We call it 'The Evening Breeze'. Not sure that's what you are looking for.