MANILA, Philippines -- Typhoon "Quedan" (international codename: Melor) entered the Philippine area of responsibility (PAR) Monday afternoon and was expected to pull Tropical Storm "Pepeng" back to Northern Luzon in what government meteorologists called the "Fujiwara effect."
"Pepeng" could hit Ilocos Norte and the Batanes group of islands in the next three days if it would follow the path of "Quedan" which has been moving towards the southern island of Japan, Dr. Prisco Nilo, administrator of the Philippine Atmospheric, Geophysical, and Astronomical Services (Pagasa) said in its 5p.m update Monday.
As "Pepeng" was moving out of the country towards Vietnam on Sunday, it was blocked by a high pressure area spotted near Hong Kong, making it stationary over the South China Sea.
Meanwhile, "Quedan" entered the Philippine area of responsibility from the east and as it headed towards Japan, began pulling "Pepeng" back to Northern Luzon.
It was the "Fujiwara effect" happening, said Nilo, where a "see-saw" interaction between "Pepeng" and "Quedan" was taking effect.
And as "Pepeng" remained stationary over the South China Sea, it was able to gather enough strength anew.
As of 5 p.m., Pagasa said "Pepeng" had slightly intensified, packing maximum sustained winds of 105 kilometers per hour near the center and gustiness of up to 135 kilometers per hour.
Earlier in the day, "Pepeng" had maximum sustained winds of 95 kilometers per hour near the center and gustiness of up to 120 kilometers per hour.
"It's possible that 'Pepeng' would still intensify into a typhoon again because it is over the sea. Its source of energy is from the water vapor," Nilo said.
"Stormy weather is still to be expected in Northern Luzon," said Nathaniel Cruz, Pagasa deputy administrator for operations and services.
This development prompted the Pagasa to raise Signal No. 3 anew over Ilocos Norte, after putting the province under Signal No. 2 earlier Monday because "Pepeng" has weakened to 95 kilometers per hour near the center.
Signal No. 2 was hoisted over Ilocos Sur, Abra, Apayao, Northern Cagayan, including Calayan and Babuyan Group of Islands and Batanes Group of Islands.
Signal No. 1 was raised over La Union, Benguet, Mountain Province, Ifugao, Kalinga, and the rest of Cagayan.
Rains are also expected to pound extreme Northern Luzon in the next three days.
Nilo described the characteristic of "Pepeng" as "erratic but not very unusual."
As it loops back to the country from the South China Sea, "Pepeng" could return to Northern Luzon, hitting Ilocos Norte particularly and the Batanes group of islands.
As of 4 p.m., "Quedan" was packing maximum sustained winds of 205 kilometers per hour near the center and gustiness of up to 250 kilometers per hour.
It is forecast to move west northwest at 26 kilometers per hour.
"Quedan" is expected to be at 780 kilometers east northeast of Basco, Batanes by Tuesday afternoon.
The typhoon is expected to be 1,080 kilometers northeast of Basco, Batanes or 350 kilometers east northeast of Okinawa, southern Japan, by Wednesday afternoon.