Pagasa: 4 weather systems affecting PH; rains likely Nov 28

Four weather systems are affecting the Philippines and are expected to cause rain in many parts of the country on Thursday, Nov. 28, 2024, according to the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (Pagasa). Weather satellite image from Pagasa

MANILA, Philippines — Four weather systems are affecting the Philippines and are expected to cause rain in many parts of the country on Thursday, Nov. 28, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (Pagasa) said.

In a morning weathercast, Pagasa weather specialist Rhea Torres said the shear line would influence atmospheric conditions in Northern and Southern Luzon areas.

Torres explained that a shear line would occur when the cold northeast monsoon converges with warm winds from the Pacific Ocean.

“We can see that it is possible for the skies over Northern Luzon to be cloudy with scattered rain showers, and later today, this could also bring rainfall, particularly over the eastern sections of Central and Southern Luzon. The axis of the shear line is expected to shift downward in the coming hours,” she said in Filipino.

Torres also said that the shear line would affect Cagayan Valley, the Cordillera Administrative Region, Aurora, and Quezon.

READ: Pagasa: ‘Amihan’ season begins

The northeast monsoon, meanwhile, will influence atmospheric conditions in Metro Manila, as well as the rest of Northern, Central, and Southern Luzon on Thursday.

“In the remaining parts of Northern, Central, and Southern Luzon, there will still be light showers. These are isolated rain showers caused by the effects of the northeast monsoon,” Torres said.

For some parts of the Visayas and many areas in Mindanao, there are high chances of rain on Thursday due to the intertropical convergence zone (ITCZ), according to Pagasa.

“Due to the effect of the intertropical convergence zone, there is a high possibility of rainfall in large parts of the Mindanao area. We also see cloud clusters that may bring rain to areas in the Visayas today,” Torres said.

READ: Rain to drench most of PH on Wed (Nov. 27) due to amihan, ITCZ

The Pagasa weather expert said the ITCZ specifically affects Basilan, Sulu, Tawi-Tawi, Caraga, and the Davao Region in Mindanao; and Bohol, Siquijor, and Eastern Visayas in the Visayas.

Torres likewise explained that localized thunderstorms may result in partly cloudy to cloudy skies, with isolated rain showers or thunderstorms in the rest of the country.

On the country’s seaboards, the state weather agency issued a gale warning over the northern, eastern, and western coasts of Northern Luzon due to the effects of the northeast monsoon.

“It is dangerous to set sail, especially along the coastal waters of Northern Luzon, because we expect rough to very rough seas due to the effect of the northeast monsoon, particularly in the waters of Batanes, as well as Cagayan including the Babuyan Islands, and the coastal waters of Ilocos Norte and Ilocos Sur,” Torres said.