Hint.FM (Fernanda Viégas and Martin Wattenberg) created a seductive visualization of wind flows for the US. Click the image for a real-time animation and links to the past few weeks of weather patterns. (via Lian)
Equally beguiling is David Wicks’ Drawing Water, which documents precipitation with the water transfers to urban users.
These maps remind me of ocean current visualization that I saw few months back created by JPL and MIT.