A funnel cloud was spotted about 10 a.m. in Jackson County near the Chevron Pascagoula Refinery.
A Sun Herald reader sent in a photo showing a small funnel cloud or waterspout near Bayou Casotte.
Jackson County Emergency Services Director Earl Etheridge said it was likely a waterspout, and that he hadn't received any reports of funnel clouds in the area.
The National Weather Service in Slidell had advised tropical funnels and waterspouts were likely as showers developed in marine and marsh areas early Thursday.
"These typically are short-lived and do not cause damage," the weather service said.
A cold front moving across the Southeast is bringing storms to the Coast, however, temperatures aren't predicted to drop.
Daily highs are expected to stay in the mid-80s through the weekend with lows in the 60s.
There is a slight chance of severe storms Friday, with possible gusty winds and lightning. The chance of precipitation is 20 percent during the day, and skies should clear by midday Friday for a sunny and hot weekend.