Dust storms on Mars can engulf the entire planet, lasting for months. elaborate
Temperature inversions can trap pollutants close to the ground, leading to worse air quality than on a day without one. elaborate
During the Dust Bowl, dust storms were so intense they sometimes darkened the sky to the point where it felt like midday twilight. elaborate
Mammatus clouds, despite their ominous appearance, don't usually indicate severe weather is *directly* imminent. They're more often associated with the aftermath of a storm. elaborate