I think this is another posting of the same story from a little while ago.
Unless...
There's a second spot on Uranus...
Uranus's most extraordinary feature is the tilt of its axis – almost 98° (or 82° if it is taken to be retrograde), so that the planet effectively spins around on its side. As a result, for part of its orbit, one pole continually faces the Sun while the other is in total darkness. Half an orbit later, the roles (and poles) are reversed. In between, the Sun rises and sets around the equator normally. For Uranus to be in such a position, it was almost certainly struck a formidable blow by another massive object. Since the plane containing its 13 rings (see Uranus, rings) and 27 known moons (see Uranus, moons) is similarly tilted, this impact presumably took place during or shortly after the accretionary phase of the planets.
http://www.daviddarling.info/encyclopedia/U/Uranus.html
http://science.nasa.gov/NEWHOME/headlines/ast29mar99_1.htm
Mar. 29, 1999: If springtime on Earth were anything like it will be on Uranus, we would be experiencing waves of massive storms, each one covering the country from Kansas to New York, with temperatures of 300 degrees below zero.