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Friday, August 23, 2019

Pagasa: Rainfall this month expected to be above normal

THE Philippine Atmospheric, Geophysical and Astronomical Services Administration (Pagasa) alerted local government units (LGUs) on Tuesday, November 1, about possible floods, as rainfall this month is expected to be above normal.

Pagasa Mactan Chief Al Quiblat said that if rainfall is above normal, this means more rainwater will flow to the drainage, creeks and rivers.

He said that if the drainage outlets are clogged, the rainwater will naturally overflow to the roads.

Quiblat said the normal rainfall for November is 154.4 millimeters and they are expecting 20 percent (185 millimeters) more this month.

Quiblat said the public can expect heavy rainfall in the next few days due to Inter-Tropical Covergence Zone (ITCZ).

Tropical depression

He said that today (November 2) is expected to be cloudy with light to moderate rains anytime, part of the day and possible thunderstorm in the afternoon and evening that may bring heavy rains.

Quiblat said that within ITCZ is low pressure area (LPA) possible to become tropical depression and expected to enter the Philippine Area of Responsibility (PAR) Wednesday night (November 2) or November 3.

There are some weather disturbances in the months of November in the past years that had affected Cebu and the Visayas.

Records

Pagasa records show that on November 13, 1990, Super Typhoon Ruping hit Cebu, blowing off roofs and damaging waterpipes.

In November 1999, Tropical Storm Sendang hit the country at the time of La Niña, causing floods in several Cebu areas.

In November 2001, Typhoon Nanang hit the country. Pagasa reported that the average monthly rainfall for the past 28 years that time was surpassed in just two days on November 6 and 7, by Nanang.

This means that from November 2000 down to 28 years before, the average monthly rainfall for the whole month of November was 165 millimeters. But the rainfall on November 6 and 7, 2001 was already 206 mm.

Three years ago, on November 8, 2013, Typhoon Yolanda hit Leyte and northern Cebu that caused heavy damage on properties and thousands of deaths.

As early as November 2011, Pagasa began installing more than 70 solar-powered rain gauges across the country.

Pagasa said the rainfall monitoring is very crucial in the operation of all meteorological services all over the world. The data is used in weather forecasting.
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