Weather for this first weekend of fall will be more typical of summer as higher humidity brings an increasing chance of precipitation. The autumnal equinox occurs this afternoon at 4:02 p.m. as the sun passes southward across the celestial equator.
And for the occasion, the atmosphere is moistening up and should bring a pretty good chance of afternoon and evening thunderstorms later today as well as on Saturday and Sunday. Highs will warm into the upper 80s to low 90s. Overnight lows should be between 72 and 75 degrees.
The thunderstorms are not directly associated with Hurricane Maria, which is now entering open waters of the Atlantic and should not threaten any more land areas during the rest of its life span. Models indicate it will pass midway between the Atlantic Seaboard and Bermuda, threatening only shipping. But it will continue to produce high surf for the next week along the entire Atlantic Coast, which has already been battered by high waves for a week by former Hurricane Jose.
There are currently no tropical features that pose a threat to the Suncoast for the next several days.