This marks the sixth such dark storm ever discovered on Neptune. Whereas Earth's worst storms typically last no more than days or weeks, Neptune's newest dark vortex is expected to last years.

The overshoot resulted in the storm cloud reaching -111°C, becoming the coldest storm cloud temperature ever recorded. The peak of the clouds had risen to an altitude of over 20.5 kilometres ...

Photos and videos of the dark storm clouds quickly filled social media. Boise State Public Safety shared a photo from one of its employees on Twitter showing the line of clouds moving toward Meridian.