A shear line weather system is expected to bring heavy rainfall to Southern Luzon, particularly the Bicol Region, raising concerns about lahars near Mayon Volcano.
The Philippine Atmospheric Geophysical and Astronomical Services Administration (PAGASA) issued a weather advisory warning against the impact of a shear line weather system currently affecting Southern Luzon . This system is anticipated to bring substantial rainfall to the Bicol Region, particularly in Albay Province, over the coming days.
The Department of Science and Technology-Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS) warns that the expected heavy rains could trigger volcanic sediment flows, known as lahars, which pose significant risks to communities situated near Mayon Volcano. Increased vigilance is strongly advised for residents in lahar-prone areas as prolonged rainfall may mobilize loose materials from previous volcanic deposits, particularly those from the January-March 2018 eruption. Key channels at risk include Miisi, Mabinit, Buyuan, and Basud, where lahars could inundate communities downstream. DOST-PHIVOLCS stressed the importance of monitoring weather conditions and implementing preemptive safety measures to mitigate potential hazards. In addition to the shear line’s effects, the northeast monsoon is influencing other regions, resulting in cloudy skies and isolated rain showers.The state weather bureau warns that flash floods and landslides are possible across these areas due to the adverse weather conditions
Shear Line Lahars Mayon Volcano Heavy Rainfall Southern Luzon
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