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3 months to go before Christmas! But before you start decorating your home and playing Christmas carols, know what to expect this month, weather-wise.

PAGASA declared an El Niño event, likely to strengthen before the end of this year, and may last until April to June of 2016. The weather bureau added that this event could be potentially included in the four strongest El Nino events since 1950. Impacts may include below-normal rainfall, and warmer than normal air temperature.

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This month, here are the weather systems likely to prevail:
Tail End of a Cold Front
The Cold Front is an area in the atmosphere where masses of warm and cold air converge, resulting in thunderstorms. Ordinarily the Axis of the Cold Front is in the level of Taiwan or Japan. The only part that is affecting the Philippines is its tail end.

Easterly Wave
The Easterly Wave, also known as Easterlies, are winds coming from the Pacific Ocean, bringing warm and humid air. PAGASA said that the easterly wave could prevail during the month of October before the northeast monsoon (amihan) breaks in. The eastern parts of the country are most likely to experience its effect: thunderstorms and isolated rain showers.

2 Tropical Cyclones this month
Because of the El Niño phenomenon, the average tropical cyclones that are likely to enter the Philippine Area of Responsibility this month are between 1-2. Normally, October has an average of 2 to 3 tropical cyclones.

Intertropical Convergence Zone (ITCZ)
The ITCZ is an area in the atmosphere where winds from the Southern and Northern Hemispheres meet—a convergence that contributes to cloud formation. According to PAGASA, the axis of ITCZ is erratic, so it may affect any part of the country, usually bringing cloudy skies and light to moderate rain showers.

Low Pressure Area
The LPA is an area that has a lower atmospheric pressure than its surrounding locations. This is usually formed in the Pacific Ocean where most water vapor is available. LPA brings light to moderate and sometimes, heavy rain showers. This could also intensify into a tropical cyclone.

October’s Temperature
PAGASA Weather Forecaster Jun Galang explained that during October, temperatures start to deviate which result to colder days. The transition of winds from the Southwest to the Northeast Monsoon influences the average temperature.
Normally, the northeast monsoon (amihan) prevails in the 2nd week of November.
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Overall, most of the weather systems this month produce cloudy sky and rain showers. It is advisable to keep monitoring weather updates straight from Panahon TV and PAGASA.

FAST FACTS – October Rainfall Forecast

Below normal rainfall is among the adverse effect of El Niño. This could lead to dry spell and drought condition.

Based on the rainfall forecast from the weather bureau, most parts of the country including the western section of central Luzon and areas over and southern Luzon, western Visayas and some parts of eastern Visayas and Zamboanga Peninsula will have way below normal rainfall.