Tropical Storm Chan-hom was moving toward Japan on Monday morning. At 11:00 a.m. EDT on Monday the center of Tropical Storm Chan-hom was located at latitude 35.7°N and longitude 147.1°E which put the center about 460 miles (745 km) east of Tokyo, Japan. Chan-hom was moving toward the northwest at 12 m.p.h. (19 km/h). The maximum sustained wind speed was 50 m.p.h. (80 km/h) and there were wind gusts to 65 m.p.h. (105 km/h). The minimum surface pressure was 981 mb.
The surface center of Tropical Storm Chan-hom is under the eastern part of an upper level low. The upper level low is producing southeasterly winds that are blowing toward the top of Chan-hom’s circulation. Those winds are causing moderate vertical wind shear. The circulation around Tropical Storm Chan-hom is also puling drier air into the southern and eastern parts of Chan-hom’s circulation.
The combination of the moderate vertical wind shear and the drier air is causing the distribution of thunderstorms in Tropical Storm Chan-hom to be asymmetrical. Thunderstorms are occurring in bands in the western half of Chan-hom’s circulation. Bands in the eastern part of Tropical Storm Chan-hom consist primarily of showers and lower clouds. Storm near the enter of Chan-hom generated upper level divergence that pumped mass away from the tropical storm. The removal of mass caused the surface pressure to decrease.
The distribution of wind speeds in Tropical Storm Chan-hom was also asymmetrical. Winds to tropical storm force extended out 145 miles (235 km) in the northern half of Chan-hom’s circulation. Winds to tropical storm force only extended out 70 miles (110 km) in the southern half of Tropical Storm Chan-hom.
Tropical Storm Chan-hom will move through an environment that will be somewhat favorable for intensification during the next 24 hours. Chan-hom will move over water where the Sea Surface Temperatures are near 26°C. However, the upper level low just to the west of the low level center of Chan-hom’s circulation will continue to cause moderate vertical wind shear. Tropical Storm Chan-hom could intensify a little in spite of the moderate vertical wind shear.
The upper level low just to the west of the surface center of Tropical Storm Chan-hom will steer Chan-hom toward the west during the next 24 hours. On its anticipated track, the center of Tropical Storm Chan-hom will reach the coast of Honshu northeast of Tokyo in about 24 hours.
Tropical Storm Chan-hom will bring strong winds and locally heavy rain to parts of central Honshu. Heavy rain is likely to cause floods in some locations.
Elsewhere, Tropical Storm Dolphin continued to drop heavy rain over parts of eastern China and former Tropical Storm Peilou weakened to a tropical depression.
At 8:00 a.m. EDT on Monday the center of Tropical Storm Dolphin was located at latitude 29.0°N and longitude 117.9°E which put the center about 60 miles (95 km) southeast of Jingdezhen, China. Dolphin was moving toward the north-northwest at 10 m.p.h. (16 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. (95 km/h). The minimum surface pressure was 990 mb.
At 11:00 a.m. EDT on Monday the center of Tropical Depression Peilou was located at latitude 22.1°N and longitude 153.6°E which put the center about 195 miles (315 km) south-southwest of Minami Tori Shima. Peilou was moving toward the northeast at 20 m.p.h. (32 km/h). The maximum sustained wind speed was 35 m.p.h. (55 km/h) and there were wind gusts to 45 m.p.h. (75 km/h). The minimum surface pressure was 993 mb.