FLORIDA – A large plume of Saharan dust is making its way across the Atlantic Ocean and is expected to arrive across Texas and even Florida and much of the Gulf Coast over the next several days.
While it may sound unusual, this is actually a normal part of Florida’s summer weather pattern.
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Each year, strong winds lift millions of tons of fine dust from the Sahara Desert in North Africa. That dust is carried thousands of miles across the Atlantic by the trade winds before eventually reaching the Caribbean, Gulf of Mexico and the southeastern United States.
What will you notice?
The biggest impact for most people will be in the sky.
Expect hazier-than-normal conditions, especially during the afternoon. Sunrises and sunsets may become even more vibrant, with deeper shades of orange, pink and red as the dust scatters sunlight.
If you’ve ever looked outside and thought the sky appeared “milky” or slightly washed out, Saharan dust is often the reason.
Will it reduce rain chances?
To a degree, yes.
Saharan dust is made up of very dry air. As it moves over Florida, it can make it a little more difficult for thunderstorms to develop by suppressing cloud growth.
That doesn’t mean rain disappears entirely. Florida’s sea breeze and summertime humidity can still produce scattered afternoon storms. Instead, the dust typically lowers overall storm coverage rather than eliminating it.
Air quality concerns
Most healthy people won’t notice much more than a hazy sky.
However, those with asthma, COPD or other respiratory conditions may experience increased irritation as concentrations of fine dust particles increase. If you’re especially sensitive to poor air quality, limiting prolonged outdoor activity may be a good idea during the thickest part of the dust plume.
Does this affect hurricanes?
Sometimes.
Large Saharan dust outbreaks are often accompanied by very dry, stable air and stronger winds higher in the atmosphere. Those ingredients can make it more difficult for tropical systems to organize while the dust is present.
It’s important to remember that this doesn’t shut hurricane season down. Tropical development is still possible once the dust moves away or if a storm forms outside the dusty environment.
Bottom line
The incoming Saharan dust will likely bring hazy skies, spectacular sunsets and slightly lower chances for widespread afternoon thunderstorms across Florida. While most people won’t experience significant impacts, those with respiratory conditions should keep an eye on local air quality forecasts.
Enjoy the colorful sunsets, but don’t be surprised if your car ends up with a light coating of fine dust after spending a few days outside.