Typhoon Jangmi on Sunday intensified further as it moved towards China's Taiwan, Xinhua quoted the Philippine weather forecast bureau as saying. The Philippine Atmospheric Geophysical and Astronomical Services Administration said the storm was 220 kms north-northeast of Basco, Batanes as of 4 a.m. Sunday, with maximum sustained winds of 215 kph near the center and gustiness of up to 250 kph. "Batanes and Calayan Group of Islands will experience stormy weather while the rest of extreme northern Luzon will have rains and gusty winds and the coastal waters along these areas will rough," it said in its 5:00 a.m. advisory. It said the rest of the country will be partly cloudy to cloudy skies with isolated rain-showers and thunderstorms. The weather forecast bureau said Jangmi was moving northwest at 19 kph and was expected to be 300 kms north of Basco, Batanes or off the coast of Eastern Taiwan by Sunday afternoon.