Rainy Season May Begin Early June, PAGASA Reports
The rainy season may start as early as the first week of June in the Philippines, according to the latest weather forecast from local experts. This four-word keyphrase, “rainy season may begin,” reflects the current outlook shared by meteorological sources monitoring weather patterns nationwide.
While some areas are already experiencing heavy rains due to the Intertropical Convergence Zone (ITCZ), authorities say the official start of the rainy season has not yet been declared. Reports indicate that the ITCZ will continue to bring moderate to heavy rainfall from May 22 to 23, particularly affecting Palawan, Mindanao, and parts of the Visayas.
Residents in these regions are advised to stay vigilant for possible flash floods and landslides as the wet conditions persist. Meanwhile, the prevailing easterly winds, which bring warm and humid air from the Pacific, remain dominant over most of the country. These winds are expected to continue until May 25, causing hot and humid days with scattered afternoon or evening rain showers.
Criteria for Declaring the Rainy Season
Local meteorological experts explain that the declaration of the rainy season depends on specific conditions. One key factor is the shift in wind patterns—from easterlies to westerlies or southwesterly winds. These winds are essential for sustaining widespread and continuous rainfall, especially over western Luzon and the Visayas.
“We are monitoring the development of the southwesterly wind flow, which may start to set in around the last few days of May, between May 29 and 31,” community leaders said. “Once that happens, we will need to observe at least five consecutive days of rainfall and the dominance of the southwesterlies before we can declare the start of the rainy season.”
Based on this timeline, the earliest possible declaration could come in early June. However, it might extend into the second week of June if the required weather conditions take longer to materialize. Historically, the rainy season onset is declared between late May and early June.
Current Weather Outlook and Safety Precautions
Despite the recent rains, the easterly winds are still the prevailing weather system, contributing to hot and humid conditions during the day. Afternoon or evening thunderstorms remain isolated but possible.
Experts urge residents in vulnerable areas to prepare for the potential risks associated with heavy rains, including flooding and landslides. Continuous monitoring and timely warnings will help ensure community safety as the rainy season approaches.
For more news and updates on the rainy season may begin, visit Filipinokami.com.