In general, wind shear refers to any change in wind speed or direction along a straight line. In the case of hurricanes ... dry air aloft associated with an upper level trough of low pressure ...

THE province of Palawan, which has been pummeled with heavy rains earlier this month due to the shear line, is now at the center of a trough of a low pressure area (LPA) outside the Philippine Area of ...

In its weather forecast on Wednesday, February 12, PAGASA said the shear line may affect the eastern ... Region and the rest of Central Luzon . The trough of low pressure area may bring cloudy ...