Tropical Storm Kammuri Develops North of Guam

A tropical depression north of Guam intensified into Tropical Storm Kammuri on Thursday.  At 8:00 p.m. EDT on Thursday the center of Kammuri was located at latitude 21.7°N and longitude 146.3°E which put it about 375 miles east-southeast of Iwo To.  Kammuri was moving toward the north-northwest at 8 m.p.h.  The maximum sustained wind speed was 50 m.p.h. and there were wind gusts to 65 m.p.h.
Kammuri is moving around the western edge of a subtropical ridge.  The ridge should continue to steer Kammuri toward the north until it begins to feel the effects of the upper level westerly winds.  The upper level westerlies should eventually turn Kammuri toward the northeast and the probability is high that it will pass southeast of Japan.
Kammuri is in a region of moderate wind shear and further intensification is possible.  It is also possible that Kammuri could reach typhoon intensity before the upper level westerly winds start to increase the wind shear.