Over in Bob Ryan Twitterland, there's a great photo of the Grímsvötn volcano blackening (well, browning) Iceland's atmosphere. The shot was taken by NASA's Terra satellite yesteday.
Iceland's meteorological agency says that "considerable" ashfall can be expected throughout the southeast sector of the country. The way the plume is wandering through the skies, it will probably be over Scotland within the day. Ash could be falling in western France and northern Spain by Thursday If the volcano keeps up its rate of fire.
The U.K.'s aviation authority is warning that jet traffic could be disrupted tomorrow. Travel updates are being posted here. For a graphic of where the ash is expected to flow in the coming days, follow the jump.