Dust, Weeds, and Watermelon Rain
David E. Will
Thursday, August 18, 2022
A few weeks ago, I drove pass Highway 304 on Interstate 10. The family ranch is just north of I-10 about 10 miles. This area is often called the sugar-sand grasslands by the locals because of the sugar-like sand that dominates the area. It actually lies within the Post Oak belt. Just past Hwy. 304 and before the Harwood exit, a strong wind carrying a large amount of dust pushed my truck to the center of the road. Even though I was driving on the far-right side of the lane, I was shaken as my truck was pushed within inches of a passing car. The dust was blinding, and the passing car disappeared within a few feet of clearing my bumper. With no one behind me, I quickly hit the brakes to slow down and locate the rumble strips at the side of the road. Lasting less than a quarter of a mile, this was no Dust Bowl event. But it reminded me of past dust storm events. These too were generally short-lived but point up the fact that the wind can pick up dust and send it miles away. In many years, Texas receives dust from Saharan Africa. Dust storms in drought years are not unusual. Grasses that normally hold down the soil have often been eaten to within an inch of the ground by hungry cattle. Brush species, such as yaupon and American beautyberry, have dropped most of their leaves and wind blows freely between plants. As the wind moves, it picks up small particles of dust and draws them skyward. The thing most likely to hold the soil in place is grass cover. Cattle grazing too low to the ground is frequently the problem. Bare patches allow the soil to dry out, further removing any moisture still in the ground. Then the hot, dry wind acts like a convection oven. Fast-moving sand in the air acts like a sand blasting gun. It can punch holes in leaves, kill small emerging buds and leave a coating of fine dust on everything.