NASA's vivid simulation shows how sea salt, dust, smoke, and sulfates from pollution and volcanoes spread across thousands of ...

The dust concentration was high, at .55 aerosol optical depth, the highest amount so far this year, said Yidiana Zayas, a forecaster with the National Weather Service in San Juan, Puerto Rico.

A colossal cloud of Saharan dust is blanketing the Caribbean en route to the U.S. The plume is expected to hit Florida, Louisiana, Alabama and Mississippi late this week and into the weekend.

Thunderstorms in the Sahara region stir up dust and push it into the atmosphere. The dust is then transported across the Atlantic and deposited in the Caribbean, Central America, and South America.

Dust from the Sahara Desert, once a massive lake, travels across the Atlantic Ocean. This dust, rich in potassium and iron from dead diatoms, fertilizes the Amazon rainforest. The Amazon River then ...

SAN JUAN, Puerto Rico — A massive cloud of dust from the Sahara Desert blanketed most of the Caribbean on Monday in the biggest event of its kind this year as it heads toward the United States ...

SAN JUAN, Puerto Rico — A massive cloud of dust from the Sahara Desert blanketed most of the Caribbean on Monday in the biggest event of its kind this year as it heads toward the United States ...

The dust concentration was high, at .55 aerosol optical depth, the highest amount so far this year, said Yidiana Zayas, a forecaster with the National Weather Service in San Juan, Puerto Rico.

SAN JUAN, Puerto Rico — A massive cloud of dust from the Sahara Desert blanketed most of the Caribbean on Monday in the biggest event of its kind this year as it heads toward the United States ...