Tropical Storm Dexter forms in Atlantic, may lead a flurry of August activity Tropical Storm Dexter formed over the weekend a few hundred miles off the Carolina coast, and AccuWeather meteorologists warn that there are additional areas that may develop in the coming days and weeks, including some areas close to the United States. Dexter evolved from a low pressure area along a stalled front just off the southern Atlantic coast. This was the same front that brought flash flooding to the mid-Atlantic on Thursday and parts of the Southeast states on Friday and into the weekend. #AtlanticStormDexter #TropicalRiskOutlook #HurricaneSeason2025