March's full "Blood Worm Moon," a phenomenon that makes the moon appear red during a total lunar eclipse, is visible this week for Americans and others in Earth's Western Hemisphere.The full moon reaches peak illumination at 2:55 a.

Earth’s shadow will block most of the light that illuminates the lunar surface, creating what is known as a blood moon.

Most of the U.S. should be able to see the total lunar eclipse tonight, but clouds will be problematic for many.