According to the National Centre for Hydro-Meteorological Forecasting, at 4 am on August 24, the storm eye was at around 19.1 degrees north and 118.5 degrees east, with the strongest velocity of 89-102km per hour.
In the next 24 hours, it is forecast to move west-northwest at about 20-25km per hour. At 4am on August 25, its centre will be at about 190km to the south-southwest of Hong Kong (China) while the strongest winds will be 103-117km per hour.
At 4am on August 26, Ma-on will go northwest, traveling 25km per hour and weaken into a tropical depression.
The storm will abate into a low-pressure area in the following 24 hours, the centre said.
