I read recently about a new type of cloud formation. It's called Undulatus asperatus. I was thinking I may have seen this today looking south from downtown Bellevue around 3pm. Sorry...the picture isn't very good...because of my cell camera.
From Wikipedia: Undulatus asperatus (or alternately, asperatus) is a rare, newly recognized cloud formation, that was proposed in 2009 as the first cloud formation added since cirrus intortus in 1951 to the International Cloud Atlas of the World Meteorological Organization. The name translates approximately as roughened or agitated waves.