The HK Observatory raised the T8 storm signal at 8:40 this morning, predicting Typhoon Khanun to pass about 200 kilometres southwest of the city later today.

At 9am it was 260 km south-southeast of the city, with maximum wind speeds of 140kmh at the centre.

The last ferries will run at 10:20am and 10:40am from Central and Mui Wo respectively, New World First Ferry has announced.

New Lantao Bus says it will halt all South Lantau services before 11am. It will run limited services on routes to Yat Tung and Tin Shui Wai.

The MTR will run as normal, but the corporation warns this may change at short notice.

The Observatory forecast for today:

Strong to gale northerly winds, occasionally storm force on parts of high ground. Becoming east to northeasterly winds. Cloudy to overcast with occasional heavy showers and squalls. Seas will be very rough with swells. The maximum temperature will be about 24 degrees.

UPDATE: MTR has announced it will provided limited rail service. Tung Chung Line trains will run at 10-minute intervals.