Nation ‘Does this make sense?’ Winds in Jupiter’s great red spot are speeding up, now over 400 mph September 27, 2021 Doyle Rice, USA TODAY Comments Off on ‘Does this make sense?’ Winds in Jupiter’s great red spot are speeding up, now over 400 mph The biggest storm in our solar system is getting wilder: Winds in Jupiter's great red spot are getting faster, astronomers reported in a new study.