Larinioides cornutus
(Furrow Orb-weaver)

She’s a Furrow Orbweaver in genus Cornutus. https://bugguide.net/node/view/33791 We use sightings data from BugGuide.net because it has many more years of data. They don’t have any sightings listed at all for spiders in this genus in Mississippi. It is okay to post a photo to more than one website if you would like to give them one.