Invest 91W (Ester)
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Live tracking map, satellite, radar, and forecasts of Invest 91W east of Taiwan. Low chance of development. Current wind speed 45km/h.
The system is currently classified as a subtropical depression, generally characterized as having both tropical and midlatitude cyclone features.
Satellite imagery, along with animated Taiwan radar data, and surface and SHIP observations show a weak, disorganized rotation moving inland over south central Taiwan, to the east of Kaohsiung.
The system lies well south of the mai-yu/meiyu boundary (MBC) currently draped across the East China Sea (East China Sea).
Animated radar data shows strong convective rain bands across the southern hemisphere of the rotation with pockets of isolated and fragmented convection developing along the eastern coast of Taiwan.
SHIP observations across the region show strengthening northeasterlies to the north and west of Taiwan, and strong south-southwesterlies along the east coast.
Over the next 24 hours, 91W (Philippine name Ester) is forecast to move back over water, emerging off Taiwan in the vicinity of Hualien and moving rapidly northeastward into the East China Sea.
Environmental conditions are conducive for a moderate amount of intensification after the system moves away from the disruptive effects of Taiwan.
The system will rapidly move northeastward while steadily becoming more subtropical in nature. Around the 36 hour point, it will begin to embed within the MBC boundary and reach peak intensity as it passes west of Okinawa.
The wind field is forecast to expand as it moves through the East China Sea, with the highest winds being located in the eastern hemisphere of the circulation.