Exoplanet weather

Astronomers are now able to calculate weather patterns of distant planets. Scientists were observing HD 1896722b in constellation Vulpecula, about 63 light years away. Using doppler shift and limb darkening, astronomers were able to calculate wind speeds blowing from the day to night side of the planet at speeds of 5400 mph. HD1896722b is a good candidate for this method because it is ~180 times closer to its parent star, is approximately 10% larger than Jupiter, and has an orbital period of 2.2 days. These extremes allow for scientists to calculate these values more easily.  If scientists decided to visit this planet, they better wear windbreakers!

Source: http://www.space.com/31128-exoplanet-global-winds-5400-mph.html