Pepeng quasi-stationary near Ilocos for 3 days
Manila (6 September) -- Northern Luzon will continue to experience stormy weather in the next three days as now tropical storm Pepeng (international code name PARMA) interacts with another weather disturbance that is whipping up in the Pacific Ocean.
Nathaniel Cruz, Philippine Atmospheric Geophysical and Astronomical Services Administration's (Pagasa) weather branch chief and deputy director for operations and services said "Pepeng continues to interact with typhoon Melor. Our forecasts indicate that Pepeng will remain quasi-stationary northwest of Ilocos Norte in the next three days."
The presence of typhoon Melor, which is expected to enter the Philippine Area of Responsibility (PAR) Monday afternoon, is pulling Pepeng causing a "dumbell" effect.
Known as Fujiwhara Effect, it causes the two tropical cyclones' vortices to "waltz" over the sea.
The stronger storm influences the movement of the weaker one: Melor is now spinning towards northwest and Pepeng, currently stationary, is expected to traverse southeastwardly in the coming days.
Melor is still outside of Philippine area of responsibility (PAR), estimated 1,220 kilometers east of extreme northern Luzon with maximum sustained winds of 205 kph and gustiness of 250 kph, moving west northwest at 25 kph.
"Melor is still too far to affect any part of the country," Cruz said.
Pepeng, however will bring moderate to heavy rains in extreme northern Luzon until Wednesday.
Pepeng will either recurve back, affecting extreme northern Luzon, head to Vietnam or will be pulled by Melor towards Okinawa, Japan.
The ridge of High Pressure Area (HPA) is also causing the non-movement of Pepeng, Cruz said.
Only the weakening of HPA will "release" Pepeng that will cause it to shoot up to Okinawa, along with Melor, he said.
Pepeng slightly weakened after traversing Ilocos and Cagayan provinces over the weekend. It was spotted 230 kilometers northwest of Laoag City, with maximum sustained winds of 95 kilometers per hour and gustiness of up to 120 kph.
Signal number 2 is maintained over Ilocos Norte, while signal number 1 is raised over Ilocos Sur, Abra, Apayao, Batanes Group of Islands, Northern Cagayan, including Calayan and Babuyan Group of Islands.
Improving weather conditions, meanwhile, can be expected over Metro Manila and surrounding areas. (PIA) [top]