Tonight's Supermoon First Of 3 This Summer

DENVER (CBS4) - Calling all sky watchers!

At 5:26 a.m. mountain time on Saturday, July 12, we'll have the first in a series of three "supermoons" this summer.

The July Full Moon is normally known by the Buck Moon, Thunder Moon or Hay Moon.

That's because this time of year buck deer start growing their antlers, thunderstorm season is in full swing, and farmers are busy trying to stockpile hay for the winter ahead.

But this year, the July Full Moon falls at a time in its orbit called perigee, or the point when it passes closest to Earth.

When a Full Moon falls at perigee, it's called a supermoon, because it appears much larger than normal, especially on the horizon.

Both the August and September Full Moons will also be supermoons this year.

The August Full Moon will occur at 12:10 p.m. on August 10, 2014. It will appear to be the biggest of the three because it'll pass closest to Earth.

September's Full Moon will happen at 7:38 p.m. on September 8, 2014.