Photo taken in an open field in the middle of the night near Batesville, MS. Very rural area.
I think it is Dolomedes albineus, a White-banded Fishing Spider. Fishing Spiders eat a variety of small animals. We don’t usually get sightings of them in fields. They’re usually clinging to vertical surfaces like trees, stone embankments, and boat docks. But, we don’t get many Winter submissions of their pics either. Maybe they change behavior in Winter.