Why The Full Moon Causing Minor Coastal Flooding Downtown

Weather News

CHARLESTON, SC (WCBD) – Why are we seeing higher than normal high tides along the Lowcountry coastline?

The tides are caused by the moon’s gravitation pull; normally, the tidal cycle contains who high tides and two low tides daily.

Here in Charleston, we know all too well that it does not take much for us to see flooding downtown. Each morning since Sunday, the National Weather Service has issued a coastal flood advisory.

Right now, the moon cycle is in its full moon phase. This month also happens to be a supermoon, which means the moon is closer than normal to earth in its orbit.

This creates a stronger gravitational pull, which causes higher than normal high tides.

Think of the moon like a magnet pulling the tides higher than normal; the closer the magnet, the stronger the pull. This is what is happening in our atmosphere.

On average the moon cycle takes about 29.5 days, and each cycle will feature a full moon.

As the moon phase progresses from a full moon to a waxing gibbous moon, our tide levels will slowly decrease.

If you do plan on driving around downtown Wednesday, drive carefully. Just like this morning we expect to see minor salt water inundation along our downtown roads.

The supermoon is expected to peak early Tuesday morning.

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