Satellite imagery can help determine the strength, size and cohesion of a storm. The stronger a storm becomes, the more likely an eye will form in the center. When the eye looks symmetrical, that often means the storm is not encountering anything to weaken it.

Hundreds of thousands of people in southern China have been evacuated and flights and trains cancelled as a result of Typhoon Wipha. The China Meteorological Administration issued an orange typhoon warning,

As of 8 a.m., the center of the year's ninth tropical depression was located southeast of Taiwan and east of the Philippines, moving west-northwest at 20 kph, per CNA. It had maximum sustained winds of 54 kph and gusts up to 92 kph.