Vanguard's test server was recently upgraded with the addition of dynamic weather patterns. Clouds now drift across the landscape and dump rain and snow, all depending on topography, temperature and region.
Word of the addition first appeared in the official* Vanguard* forums where user "Whave" mentioned having seen the storm clouds.
"The storms are indeed real. You can see them off in a distance, like that screenshot shows," said SOE designer Lenny Gullo, joining the thread to give confirmation.
"The storm there is obviously a few chunks away. But it could, depending on the wind, head your direction."
While real-time weather in MMOs has been done before, it's always nice to see Vanguard
picking up attributes it was supposed to have at launch. At this rate we'll see a launch-complete version sometime around March 2009.
Did they put dynamic weather in while I was asleep?! [Vanguard Official Forums]