Typhoon Sinlaku started to move away from the Marianas on Friday.  At 5:00 p.m. EDT on Friday the center of Typhoon Sinlaku was located at latitude 21.2°N and longitude 146.4°E which put the center about 180 miles (290 km) north-northeast of Agrihan.  Sinlaku was moving toward the northeast at 7 m.p.h. (11 km/h).  The maximum sustained wind speed was 80 m.p.h. (130 km/h) and there were wind gusts to 100 m.p.h. (160 km/h).  The minimum surface pressure was 974 mb.

Typhoon Sinlaku continued to weaken as it moved away from the Marianas on Friday.  An eye was no longer visible at the center of Sinlaku’s circulation.  Thunderstorms were still occurring near the center of Typhoon Sinlaku.  Thunderstorms were also occurring in bands in the eastern and southern parts of Sinlaku’s circulation.  Bands in the western and northern parts of Typhoon Sinlaku consisted primarily of showers and lower clouds.  Storms near the center of Sinlaku still generated some upper level divergence that pumped mass away from the typhoon.  However, the removal of mass in the upper levels was less than the convergence of mass in the lower levels of the atmosphere.  So the surface pressure continued to increase.

The circulation around Typhoon Sinlaku was still large.  Winds to typhoon force extended out 65 miles (105 km) from the center of Sinlaku’s circulation.  Winds to tropical storm force extended out 270 miles (435 km) from the center of Typhoon Sinlaku.

Typhoon Sinlaku will move through an environment that will be unfavorable for intensification during the next 24 hours.  Sinlaku will move over water where the Sea Surface Temperatures are near 25°C.  It will move under the southeastern part of an upper level trough that is southeast of Japan.  The upper level trough will produce southwesterly winds that will blow toward the top of Sinlalu’s circulation.  Those winds will cause the moderate vertical wind shear.  Sinlaku also continue to pull drier air into its circulation.  The drier air will continue to to inhibit the development of new thunderstorms in the rainbands revolving around the center of Sinlaku’s circulation.  The cooler Sea Surface Temperatures, more vertical wind shear and drier air will cause Typhoon Sinlaku to continue to weaken during the next 24 hours.

Typhoon Sinlaku will move around the northwestern part of a high pressure system that is over the Western North Pacific Ocean.  The high pressure system will steer Sinlaku toward the northeast during the next 24 hours.  On its anticipated track, will continue to move away from the Marianas.