 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 . 
