Taken from Sky & Telescope:
Total eclipse of the Moon tonight, visible throughout the Americas (except Alaska). The eclipse is also visible from western Europe and western and southern Africa before dawn Friday morning.
The first faint shading should become detectable on one side of the full Moon around 9:30 p.m. EDT, while the Moon is in the penumbra (outer fringe) of the Earth's shadow. Partial eclipse begins at 10:03 p.m. EDT, when the edge of the Moon enters the umbra, the dark central part of Earth's shadow. Total eclipse (when the Moon is completely in the umbra) runs from 11:14 p.m. to 12:06 a.m. EDT. During this time the Moon will probably glow an eerie, deep orange-red. Partial eclipse ends at 1:17 a.m. EDT. The last penumbral shading is gone around 1:50 a.m. EDT.
Convert these times to your own time zone. In western North America, the eclipse will already be under way when the Moon rises around the time of sunset. For more on this beautiful eclipse, see our article in the May Sky & Telescope, page 104, or online.
I shall seek out my telescope after work, for I simply must see this :)