Convection Redevelops in Remnants of Jangmi

Upper level wind shear decreased over the remnants of Jangmi on Thursday and thunderstorms redeveloped on the western side of the circulation.  At 11:00 p.m. EST on Thursday the center of circulation of the remnants of Jangmi was located at latitude 5.8°N and longitude 112.0°E which put it about 360 miles northeast of Kuching, Malaysia on the island of Borneo and about 600 miles east of Kuala Terengganu, Malaysia.  The center of circulation was moving just slightly south of due west at 8 m.p.h.  The maximum sustained wind speed was 35 m.p.h. with gusts to 45 m.p.h.  The minimum surface pressure was 1007 mb.

The subtropical ridge that was pushing strong southeasterly winds in the upper levels over the top of the remnants of Jangmi weakened slightly on Thursday.  As the upper level winds slowed down, it allowed more thunderstorms to develop around the western half of the circulation.  The increase of convection also increased the vertical extent of the circulation and created the potential for Jangmi to redevelop as a tropical cyclone.  The circulation is over Sea Surface Temperatures near 28°C, which provide sufficient energy to support a tropical cyclone.

As the circulation has grown taller, it has been steered more toward the west.  That pushed the center of circulation north of the northern tip of Borneo and kept it over the South China Sea.  Guidance suggests that the remnants of Jangmi will continue to move in a generally westerly direction which would take it toward Malaysia.