Tropical Storm Yinxing formed east of the Philippines on Sunday.  At 4:00 p.m. EST on Sunday the center of Tropical Storm Yinxing was located at latitude 11.5°N and longitude 134.0°W which put the center about 955 miles (1540 km) east-southeast of Manila, Philippines.  Yinxing was moving toward the west at 15 m.p.h. (24 km/h).  The maximum sustained wind speed was 45 m.p.h. (75 km/h) and there were wind gusts to 60 m.p.h. (105 km/h).  The minimum surface pressure was 997 mb.

A low pressure system over the Western North Pacific Ocean east of the Philippines strengthened on Sunday and the Japan Meteorological Agency designated the system as Tropical Storm Yinxing.  The circulation around Yinxing was organizing rapidly.  More thunderstorms were forming near the center of Tropical Storm Yinxing.  Bands of showers and thunderstorms were revolving around the center of Yinxing’s circulation.  Storms near the center of Yinxing generated upper level divergence that pumped mass away from the tropical storm.  The removal of mass caused the surface pressure to decrease.

Tropical Storm Yinxing will move through an environment favorable for intensification during the next 24 hours.  Yinxing will move over water where the Sea Surface Temperatures are near 30°C.  It will move through a region where the upper level winds are weak and there will be little vertical wind shear.  Tropical Storm Yinxing will intensify during the next 24 hours.  Yingxing is likely to strengthen to a typhoon on Monday.

Tropical Storm Yinxing will move around the southwestern part of a high pressure system over the Western North Pacific Ocean.  The high pressure system will steer Yinxing toward the northwest during the next 24 hours.  On its anticipated track, Tropical Storm Yinxing will move toward the northern Philippines.