yep, that is a nightmare image

We can get phenomenon like this sometimes in the Great Plains states and down into Texas. I saw something very similar in San Antonio about twelve years ago, at the same time that an F5 tornado was plowing through a small town north of San Antone. It was about noon, "partly cloudy" with a few ominous thunderheads to the north. Within fifteen minutes those storm clouds had arrived over the city and immediately the drivers had to turn on their headlights. The streetlights came on and security lights in yards and on businesses blinked on as well. I pulled into a Popeye's Chicken to wait it out. It stayed like that for three or four hours, with hard rain and hail and the winds reached 120 miles per hour in some places.