The sixteenth depression and fourteenth named storm of the erratic 2019 Atlantic hurricane season, Nestor originated from a broad area of low pressure over the Western Caribbean.

It emerged in the Gulf of Mexico and began to organize slightly, becoming Potential Tropical Cyclone Sixteen due to its threat to the Southeastern United States.

[3] The low fully emerged into the Bay of Campeche on October 16 after bringing heavy rain to Central America and due to the warm temperatures in the Gulf of Mexico at the time, convection significantly improved with the system near the center and it was given a medium chance of development.

[10] The system began to slow down as wind shear generated by the trough caused the storm to weaken as it neared the Florida Panhandle coast.

Nestor rapidly lost its tropical characteristics due to interaction with this trough, and was declared to have become an extratropical cyclone early on October 19, however still bringing storm surge and heavy rains to the coast anyway.

[11] Nestor's post-tropical remnant then made landfall in St. Vincent Island, Florida with winds up to 45 mph,[12] becoming further disorganized across the Southeastern United States for the next couple of days.

[22] One other EF0 tornado was confirmed in Cordele, Georgia, downing trees, shifting a barn off it foundation, and ripping part of a metal roof off an industrial building.