What you should know about the Saharan Dust cloud headed to the U.S.

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A massive cloud of dust from the Sahara Desert will reach the U.S. this week.

The Sahara Air Layer occurs when dry air and dust gathers over the Sahara Desert.

This is the largest dust event to travel across the Atlantic this year.

After making its way across the Atlantic Ocean, a massive cloud of dust from the Sahara Desert is expected to reach the U.S. on Wednesday afternoon.

The cloud of dust, which is believed to stretch 2,000 miles west to east and 750 miles from north to south, will first hit Florida and then spread to other states, according to USA Today. When it reaches Florida it will have traveled over 5,000 miles from North Africa.

This is the largest Saharan dust cloud so far this year to travel across the Atlantic.

It is expected to have little effect on