A well developed center of circulation formed in an area of thunderstorms near the island of Mindanao and the system has been classified as Tropical Storm Jangmi.  At 10:00 p.m. EST on Sunday the center of Tropical Storm Jangmi was located at latitude 8.8°N and longitude 126.0°E, which put it near the city of Prosperidad on Mindanao.  The center of Jangmi was located about 200 miles east-southeast of Cebu, about 500 miles east of Puerto Princesa and about 1550 miles east-northeast of Singapore.  Jangmi was moving toward the west-northwest at 10 m.p.h.  The maximum sustained wind speed was 45 m.p.h. and there were gusts to 60 m.p.h.

The atmospheric environment around Jangmi is generally favorable for intensification.  Easterly winds in the upper levels are causing some wind shear, and there is more convection on the western side of the storm.  However, upper level divergence is very well developed on the northern side of the circulation and the circulation is pumping out mass.  The center of circulation was organizing rapidly as Jangmi neared Mindanao and there was some evidence of an eye forming.  The center has now moved over Mindanao and movement over land will disrupt the circulation in the short term and it should limit the potential for intensification during the next 24 hours.  Sea Surface Temperatures around the southern Philippines are warm and Jangmi could intensify when it moves west of Mindanao.  The tropical storm will encounter cooler and drier air after it moves west of the Philippines.

Jangmi is being steered in a general west to west-northwesterly direction by a subtropical ridge to it north.  It is expected to continue in that general direction during the next day or two.  When Jangmi moves west of the Philippines it will encounter stronger northeasterly winds in the lower levels of the atmosphere.  Those winds could push Jangmi more toward the west-southwest later this week.

The relatively slow movement of Jangmi could create the potential for locally heavy rainfall over portions of the southern Philippines.  In places where the heaviest rain falls, it could create the conditions to produce some flooding and landslides.