Overview
- An initial, light plume of Saharan dust began affecting parts of south Florida and spreading toward the Gulf Coast by Wednesday, producing a thin haze and prompting local air‑quality alerts.
- Forecast models show that a larger, denser plume could arrive late this week into early next week with peak concentrations currently projected around June 29–30, though timing and strength remain uncertain.
- The dust carries fine and coarse particles (PM2.5 and PM10) plus minerals such as quartz and feldspar, which can irritate eyes and airways and raise cardiovascular risks for people with asthma, the elderly, and children.
- Meteorologists say the Saharan air layer brings very dry air and wind shear aloft that tends to limit cloud formation and make it harder for tropical storms to organize over the Atlantic and Gulf.
- Officials advise sensitive groups to limit outdoor exertion during higher concentrations, and forecasters warn travelers and the public to expect reduced visibility, hazy skies, vivid sunrises and sunsets, and evolving advisories from local agencies.