MANILA, Sept. 20 -- "Nando" has rapidly intensified into a typhoon as it moves over the Philippine Sea.

As of 10 a.m. Saturday, Typhoon Nando was located 775 km. east of Casiguran, Aurora, packing maximum sustained winds of 120 kph near the center and gustiness of up to 150 kph, and moving west-northwestward at 10 kph.

Wind Signal No. 1 will be hoisted over Northern Luzon and the eastern section of Central Luzon on Saturday afternoon, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) said.

On the forecast track, the center of Nando may pass close to or make landfall over Batanes or the Babuyan Islands Monday afternoon or evening, and exit the Philippine Area of Responsibility by Tuesday morning....