Typhoon Jangmi threatens Japan as Europe swelters

Typhoon Jangmi is forecast to track near Okinawa, Japan, on Monday before moving towards the south-east of the country. It formed within the monsoonal gyre over the Philippine Sea. A monsoonal gyre is a large, slow-rotating weather system that spawns typhoons through smaller vortices formed within it; this flow can intensify storms.

Such typhoons are typically characterised by broad areas of low pressure and extensive wind fields, often without a distinct eye. Residents have been advised to take precautions as strong winds and heavy rain early this week raise the risk of flooding, storm surges and landslides.

By early Monday morning the typhoon was moving at 10mph (16km/h) with sustained winds of 67mph, gusts up to 100mph and a central pressure of 975hPa. The Japan Meteorological Agency forecasts the pressure could fall to about 965hPa, with maximum winds increasing to 70mph and gusts reaching 110mph on Monday.

Japan, Okinawa

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