Typhoon Guchol turned toward the northeast on Saturday as it moved over the Western North Pacific Ocean. At 5:00 p.m. EDT on Saturday the center of Typhoon Guchol was located at latitude 22.6°N and longitude 131.3°E which put it about 215 miles (345 km) south of Minamidiatojima, Japan. Guchol was moving toward the north-northeast at 14 m.p.h. (22 km/h). The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 115 m.p.h. (185 km/h). The minimum surface pressure was 969 mb.

Typhoon Guchol started to turn toward the northeast on Saturday, as it was affected by an upper level trough west of Japan. The upper level trough was producing westerly winds that were blowing toward the top of Guchol’s circulation. Those winds were causing the vertical wind shear to increase and the increasing shear was affecting the structure of Typhoon Guchol. There was still an eye at the center of Guchol’s circulation, but thunderstorms were only occurring in the eastern part of the eyewall. Thunderstorms were also occurring in bands in the eastern half of the typhoon. Bands in the western half of Typhoon Guchol consisted primarily of showers and low clouds. Storms in the eastern side of Guchol generated upper level divergence that pumped mass away to the northeast of the typhoon. Winds to typhoon force extended out 75 miles (120 km) from the center of Guchol. Winds to tropical storm force extended out 185 miles (295 km) from the center of circulation.

Typhoon Guchol will move through an environment that will become even less favorable for intensification during the next 24 hours. Guchol will move over water where the Sea Surface Temperatures are near 28˚C. The upper level trough west of Japan will continue to produce westerly winds that will blow toward the top of Guchol’s circulation. Those winds will cause the vertical wind shear to increase even more. The increase in wind shear will make the environment even less favorable for intensification. Typhoon Guchol will weaken during the next 24 hours.

The upper level trough west of Japan will steer Typhoon Guchol toward the northeast during the next 48 hours. On its anticipated track Typhoon Guchol could pass between Minamidaitojima and Iwo To during the next 24 hours. Guchol will pass south of Tokyo in less than 48 hours.

Typhoon Guchol moved toward the north over the Western North Pacific Ocean on Friday morning. At 11:00 a.m. EDT on Friday the center of Typhoon Guchol was located at latitude 18.6°N and longitude 130.0°E which put it about 465 miles (750 km) south of Minamidiatojima, Japan. Guchol was moving toward the north at 6 m.p.h. (10 km/h). The maximum sustained wind speed was 90 m.p.h. (145 km/h) and there were wind gusts to 115 m.p.h. (185 km/h). The minimum surface pressure was 970 mb.

Typhoon Guchol was showing evidence of weakening on Friday morning. A circular eye with a diameter of 50 miles (80 km) was at the center of Guchol’s circulation. The eye was surrounded by a broken ring of thunderstorms and the strongest winds were occurring in that ring of storms. There was a break in the northwestern part of the ring of storms. Other thunderstorms were occurring in bands in the southern and eastern sides of Typhoon Guchol. Bands in the northern and western parts of Guchol’s circulation consisted primarily of showers and lower clouds. Storms near the center of circulation generated upper level divergence that pumped mass away from the typhoon. Winds to typhoon force extended out 30 miles (50 km) from the center of Guchol. Winds to tropical storm force extended out 185 miles (295 km) from the center of circulation.

Typhoon Guchol will move through an environment that will become less favorable for intensification during the next 24 hours. Guchol will move over water where the Sea Surface Temperatures are near 28˚C. Typhoon Guchol will move closer to an upper level trough west of Japan. The upper level trough will produce westerly winds that will blow toward the northern part of Guchol’s circulation. Those winds will cause the vertical wind shear to increase. The increase in wind shear will make the environment less favorable for intensification. Typhoon Guchol could weaken during the next 24 hours.

Typhoon Guchol will move around the western part of high pressure system over the Western North Pacific Ocean. The high pressure system will steer Guchol toward the north during the next 24 hours. The upper level trough west of Japan will steer Guchol toward the northeast during the weekend. On its anticipated track Typhoon Guchol could pass between Minamidaitojima and Iwo To during fthe weekend.