Typhoon Matmo, the 11th storm to hit the East Sea, is forecast to be over the waters of Quang Ninh on the night of October 5, with very strong winds of level 12–13 and gusts reaching level 16, said Associate Professor Dr. Mai Van Khiem, Director of the National Centre for Hydro-meteorological Forecasting (NCHMF).

As of 1:00 am, the low-pressure area was located at around 20.0 degrees North latitude and 104.8 degrees East longitude. The strongest winds near its centre were below level 6 (under 39 km/h). Earlier, in the night of July 22, it had weakened into a low-pressure area over the Viet Nam–Laos border.