This cloud is known as a roll cloud. The National Weather Service defines a roll cloud as “A low, horizontal tube-shaped arcus cloud associated with a thunderstorm gust front (or sometimes with a cold front).”
While they may look ominous, most of the time roll clouds are harmless. They can sometimes foreshadow an arriving thunderstorm, however, in the absence of storms, roll clouds can sometimes form on certain types of boundaries in the area.
From personal experience, the wind can sometimes suddenly increase behind a roll cloud. I have personally experienced a roll cloud on Lake Conroe several years ago. While there was not a storm associated with it, I do remember it getting quite windy once the cloud passed.
Christian Terry covered digital news in Tyler and Wichita Falls before returning to the Houston area where he grew up. He is passionate about weather and the outdoors and often spends his days off on the water fishing.