Tropical Storm Peipah brought wind and rain to parts of Japan on Thursday. At 11:00 a.m. EDT on Thursday the center of Tropical Storm Peipah was located at latitude 32.8°N and longitude 132.8°E which put the center about 60 miles (95 km) southwest of Kochi, Japan. Peipah was moving toward the northeast at 16 m.p.h. (26 km/h). The maximum sustained wind speed was 40 m.p.h. (65 km/h) and there were wind gusts to 50 m.p.h. (80 km/h). The minimum surface pressure was 997 mb.
The circulation around Tropical Storm Peipah exhibited more organization on Thursday. More thunderstorms formed near the center of Peipah’s circulation. Thunderstorms were also occurring in bands in the eastern and northern parts of Tropical Storm Peipah. Bands in the western and southern parts of Peipah’s circulation still consisted primarily of showers and lower clouds. Storms near the center of Peipah generated upper level divergence that pumped mass away to the northeast of the tropical storm.
In spite of the improved organization the distribution of wind speeds in Tropical Storm Peipah continued to be asymmetrical. Winds to tropical storm force extended out 125 miles (200 km) in the southeastern quadrant of Peipah’s circulation. The winds in the other parts of Tropical Storm Peipah were blowing at less than tropical storm force.
Tropical Storm Peipah will move through an environment somewhat favorable for intensification during the next 24 hours. Peipah will move over water where the Sea Surface Temperatures are near 29°C. It will move under the southern part of an upper level trough that is northwest of Japan. The upper level trough will produce westerly winds that will blow toward the top of Peipah’s circulation. Those winds will cause moderate vertical wind shear. The vertical wind shear will inhibit intensification but the wind shear may not be enough to prevent intensification. The center of Peipah will pass over southern Shikoku during the next few hours. Tropical Storm Peipah could intensify a little during the next 24 hours when the center of circulation is over water.
The upper level trough that is northwest of Japan will steer Tropical Storm Peipah toward the east-northeast during the next 24 hours. On its anticipated track, the center of Peipah’s circulation will move over southern Shikoku during the next few hours. The center of Peipah will be south of Kyoto in 12 hours. Tropical Storm Peipah could be near Tokyo in 24 hours.
Tropical Storm Peipah will bring gusty winds and locally heavy rain to parts of Shikoku and Honshu. Heavy rain could cause flash floods in some locations.
