MANILA, Philippines – The state weather bureau on Thursday morning hoisted the orange warning signal over the northern portion of Metro Manila as heavy rains from the southwest monsoon is expected over the coming hours.
In an advisory issued 9 a.m., PAGASA said the series of thunderstorms embedded over the southwest monsoon (habagat) will bring moderate to heavy (7.5-15.0mm/hr) rains over Caloocan, Malabon, Navotas, Valenzuela, Quezon City and nearby areas within the next two hours.
Intense rains (15 -30 mm/hr) may also occur occasionally, the advisory said.
The orange warning replaces the green warning in the three-catergory rain warning signal of PAGASA.
Green, originally used to signify a second-level alert (15-30 mm /hr rainfall observed in one hour and expected to continue in the next 3 hours), has been changed to orange, effective Thursday, August 9, 2012.
This, according to Science and Technology Secretary Mario Montejo on DZMM, is because people associate green with “go,” or safety.
PAGASA said it had observed moderate to heavy (6.0-15.0 mm/hr) rains over the northern portion of Quezon City, Valenzuela, Malabon, Navotas, and heavy to intense (15-30 mm/hr) rains over north Caloocan.