Saharan dust comes all the way across the Atlantic Ocean during Hurricane Season. We always hear about Saharan dust during the summer and throughout Hurricane Season. These are the winds that pick up dust from the Saharan Desert in the summer. The sun can only travel directly overhead up until the Tropic of Cancer (23.5°N), which happens to be right over the Saharan Desert. So it gets really hot right there in the summer, causing the positive temperature gradient that flips the wind direction.

Source: The North Africa Journal July 25, 2023 16:12 UTC