The big question looming over Sunday’s night total elipse of a supermoon is this: Will clouds ruin the celestrial show for southwestern Connecticut residents?

Unfortunately, it sounds likely.

A lunar eclipse happens when the Earth passes between the sun and moon, causing the moon to take on a reddish, Mars-like color. The eclipse is happening at a time when the moon is closest to the earth. It’s called a supermoon because the full moon will appear 14 percent larger and shine 30 percent more light, according to NASA.

Because the moon is so close to the Earth, the National Weather Service says there could be localized coastal flooding Saturday night when high tide (between 10:30-45 p.m.) expected to be a half to a foot higher than normal.

For several days we’ve had mostly clear night skies, but now the National Weather Service is calling for “mostly cloudy” conditions with a slight chance of rain after midnight. Some forecasts like The Weather Channel and Weather Underground. are only calling for “partly cloudy” skies. The cause of this is a low pressure system that moves offshore into the Atlantic Ocean and allowing moisture to stream up the Mid-Atlantic coast.

Clouds are expected to develop from the moisure with a chance of rain late Sunday night and Monday.

The Sunday eclipse will start at 10:11 p.m. and continue to 11:23 p.m. There’s a chance that clouds may not be as thick by the time of the eclipse, making it partially visible.

On Friday night, we had high-elevation clouds that allowed us to see a bright, fuzzy moon.

What makes the potential for cloudy skies even more disheartening is the fact that supermoon total eclipses have happened only five times since the 1900s; the last time was in 1982.

If clouds ruin the show for us Sunday night, we’ll to wait for the next total lunar eclipse … in 33 years.