The Central Weather Bureau yesterday upgraded Typhoon Nanmadol to a strong typhoon, adding that it would issue a sea warning this morning.
As of 2pm yesterday, Nanmadol was centered about 610km off the southeast coast of Oluanpi (鵝鑾鼻). It was moving northwest at 9kph. The radius of the storm had expanded to 180km.
The bureau forecast that the center would move to 420km off the southeast coast of Oluanpi by 2pm today.
Earlier this week, the bureau had forecast that Nanmadol would move closer to Tropical Storm Talas off Guam and the two would orbit around each other and generate the Fujiwhara effect. It added that Nanmadol would slide close to the edge of the bureau’s sea alert zone for typhoons.
Bureau forecaster Hsieh Min-ken (謝旻耕) yesterday said that Nanmadol had been moving slowly westward in the past couple of days and it did not start moving north until yesterday.
“The two [tropical storms Nanmadol and Talas] were not attracted to each other as expected,” Hsieh said, adding that the two storms were 1,700km apart.
Asked about the possibility of issuing a land warning for Nanmadol, Hsieh said that it would depend on its path.
“If it [the typhoon] moves north-northwest, then it’s possible that a warning will be issued,” he said. “Only if if it moves north-northeast, would its circumfluence affect Taiwan.”
The weather bureau’s forecast showed that Nanmadol’s projected path of movement had shifted toward the east coast of Taiwan, and it would come closest to land when it reaches the nation’s northeast coast. The typhoon was unlikely to make landfall, the forecast showed.
Hsieh said that Nanmadol’s circumfluence would start affecting the weather over the weekend. Chances of showers would be high in the northern, northeastern, eastern and southeastern regions.
Hsieh said the rainy weather would become more obvious tomorrow, particularly in the northern and northeastern regions.