Overview
- A cold front moves in Friday night and will push cooler, drier air across much of the country for the Labor Day holiday weekend, easing late‑summer heat in many inland areas.
- South Florida faces repeated afternoon and evening thunderstorms through Sunday and Labor Day with 50–80% precipitation chances and elevated risks of localized flash flooding from slow‑moving storms.
- Multiple Eastern Pacific storms, especially Hurricane Marie, are producing long‑period swell that has led the NWS to issue High Surf, Beach Hazard and Coastal Flood Advisories for California beaches with 6–10 foot breaking waves and dangerous rip currents.
- A stalled frontal boundary over parts of the Midwest, Mid‑Atlantic and Northeast keeps a threat of scattered to strong or severe storms into the weekend, with damaging winds, large hail and heavy rainfall possible according to the SPC and local forecast offices.
- Holiday travelers and beachgoers should expect lifeguard warnings, possible short‑notice closures, spotty travel delays and localized flooding in saturated areas, and should follow county‑level watches and advisories from the NWS, SPC and NHC for timing and safety guidance.