BEIJING, Oct. 17 (Xinhua) -- High waves are expected on Wednesday and Thursday in the East China Sea due to a strong cold front and tropical storm Prapiroon, the National Marine Environmental Forecasting Center warned.
The center has forecast waves up to five meters high from midday Wednesday to noon Thursday. It issued a yellow alert Wednesday morning, warning ships and people in affected areas to be careful and urging authorities to take full precautions.
The typhoon, the 21st of the year, will produce waves measuring three to four meters high in seas surrounding the Diaoyu Islands.
Waves up to 3.5 meters high are expected along the northern coast of Zhejiang and Fujian provinces, both in east China.
China has a four-tier color-coded warning system for strong winds, with red being the most serious, followed by orange, yellow and blue.
The center also issued a yellow alert for storm surges.
It forecast up to 70 cm of precipitation on Wednesday along the coast from the city of Wenzhou in southeast China's Zhejiang Province to Dongshan county in neighboring Fujian Province.
The center called on local authorities to brace for high tides by reinforcing fishing facilities and sea walls in susceptible areas.