 Early on December 5, the associated frontal features dissipated and the convection became better organized, while the center had a warm core and was co-located with an upper-level low. It was estimated that the system transitioned into a subtropical storm at that time with winds of 50 mph (85 km / h). The NHC operationally treated it as a non-tropical low. After becoming subtropical, the storm turned northward due to an upper-level system. The wind field gradually became smaller while the convection organized into weak rain bands. Separating from the upper-level low aloft, the storm became more tropical in nature, although it was unable to complete the transition. On December 6, the storm turned eastward due to increased upper-level flow, which also increased wind shear. The circulation became distanced from thunderstorm activity, which soon dissipated entirely. After turning back to the north, the storm weakened further due to cooler water temperatures, degenerating into a remnant low on December 7. The storm produced sustained winds of 37 mph (59 km / h) on Santa Maria Island in the Azores, with gusts to 54 mph (87 km / h). Late on December 7, the system degenerated into a remnant trough about 110 mi (180 km) south of the Azores.
