On October 10, the NHC began to monitor for a poorly defined area of low pressure that was forecast to form near Central America.
The low developed on October 11 and meandered almost parallel to the coast of Honduras for the next few days, before finally crossing over Central America near the Yucatan Peninsula on October 14.
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.
 The system became very broad but proceeded to be designated as Potential Tropical Cyclone Sixteen the proceeding day due to its threat to the United States Gulf Coast.
The disturbance intensified over the following hours, attaining winds up to 60 mph (95 km/h), with cloud tops colder than -80° enveloping the center.
The disturbance's circulation however remained very elongated, and was still not named.
Later that evening on October 18, the circulation improved and became more defined, while the system was finally designated Tropical Storm Nestor.

Nestor began to then accelerate to the northeast aided by a ridge to its northeast, although wind shear generated by a nearby trough almost embedded within the northern side of the cyclone began to give Nestor a lopsided appearance on satellite imagery shortly after its designation.
Due to Nestor's broad nature, gale-force winds were already beginning to be observed near the coast of Florida Panhandle.
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.
Nestor's post-tropical remnant then made landfall in St. Vincent Island, Florida with winds up to 45 mph, becoming further disorganized across the Southeastern United States for the next couple of days.
On October 21, Nestor's extratropical remnant was absorbed into another extratropical storm off the coast of the Southeastern United States.
On October 10, the NHC began to monitor for a poorly defined area of low pressure that was forecast to form near Central America. The low developed on October 11 and meandered almost parallel to the coast of Honduras for the next few days, before finally crossing over Central America near the Yucatan Peninsula on October 14. 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.  The system became very broad but proceeded to be designated as Potential Tropical Cyclone Sixteen the proceeding day due to its threat to the United States Gulf Coast. The disturbance intensified over the following hours, attaining winds up to 60 mph (95 km/h), with cloud tops colder than -80° enveloping the center. The disturbance's circulation however remained very elongated, and was still not named. Later that evening on October 18, the circulation improved and became more defined, while the system was finally designated Tropical Storm Nestor.
Nestor began to then accelerate to the northeast aided by a ridge to its northeast, although wind shear generated by a nearby trough almost embedded within the northern side of the cyclone began to give Nestor a lopsided appearance on satellite imagery shortly after its designation. Due to Nestor's broad nature, gale-force winds were already beginning to be observed near the coast of Florida Panhandle. 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. Nestor's post-tropical remnant then made landfall in St. Vincent Island, Florida with winds up to 45 mph, becoming further disorganized across the Southeastern United States for the next couple of days. On October 21, Nestor's extratropical remnant was absorbed into another extratropical storm off the coast of the Southeastern United States.
Tropical Storm Nestor (2019)