Typhoon

• PAGASA forecasters use three domains where they monitor, analyze and forecast tropical cyclones: the Philippine Area of Responsibility, Tropical Cyclone Advisory Domain and the Tropical Cyclone Information Domain.
• These domains can be visualized as "three-layered zones" that enclose the country.
• If a tropical cyclone is present inside these domains, PAGASA is obliged to provide information about the weather disturbance to the public.
• Because most tropical cyclones come from the broad expanse of ocean east of the country, the eastern boundary of each domain is farther from the Philippine Islands than the western boundary.
• Several names have been removed from the naming lists by the PAGASA for other reasons, including being similar to other names and political reasons.
• Few stress, plants, and crops will survive.
• The Fujiwhara Effect, also known as the Fujiwara effect, Fujiwara interaction, or binary interaction, was first described in 1921 by Sakuhei Fujiwhara, a Japanese meteorologist.
• When two storms move towards another, an uncommon phenomenon called the Fujiwhara Effect can happen.
• The smallest and innermost monitoring domain, whose boundary is closest to the Philippine Islands, is the Tropical Cyclone Information Domain.
• The exact dimensions of this domain are the area of the Western North Pacific bounded by imaginary lines connecting the coordinates: 5° N 115° E, 15° N 115° E, 21° N 120° E, 25° N 120° E, 25° N 135° E and 5° N 135° E.
• As of 2023, 75 tropical cyclone names have been retired by the PAGASA, with the most recent being Agaton, Florita, Karding, and Paeng of the previous typhoon season.
• PAGASA as of 23 March 2022 are as follows: TROPICAL DEPRESSION (TD) - a tropical cyclone with maximum sustained winds of up to 61 kilometers per hour (kph) or less than 33 nautical miles per hour (knots).
• TROPICAL STORM (TS) - a tropical cyclone with maximum wind speed of 62 to 88 kph or 34 - 47 knots.
• SEVERE TROPICAL STORM (STS), a tropical cyclone with maximum wind speed of 89 to 117 kph or 48 - 63 knots.
• Minor to moderate damage may occur to makeshift or old dilapidated structures, and other structures made of light materials.
• Some electrical wires may be blown down, resulting in local power outages.
• Well-constructed houses may suffer minimal to minor roof damage.
• Unsecured, exposed outdoor items of light to moderate weight may become projectiles, causing additional damage or injuries.
• Minimal disruption to public transportation is expected during a tropical storm.
• Many areas may suffer power outages with numerous downed power lines and posts.
• Considerable damage is likely to rice and other similar crops, especially those in flowering and ripening stages.
• Houses of poor or average construction will have considerable roof damage, some blown-out windows, and/or partial wall damage.
• Houses of poor or average construction may receive major damage, including complete roof failure and possible wall collapse; a few may suffer severe damage.
• Minimal to minor disruption in telecommunications and potable water supply is expected.
• Moderate to significant disruption to public transportation is expected.
• Some small trees blow over, with twigs and branches of frail trees broken.
• Warehouses and other buildings in industrial parks may suffer minor to moderate damage.
• Unsecured, exposed lightweight items may become projectiles which may cause additional damage.
• Most banana and similar plants are tilted, with some stooped or downed.
• Severe damage will occur to makeshift or old, dilapidated structures, and other structures made of light materials.
• Houses of poor and average construction, such as unreinforced CHB/masonry, mixed timber - CHB, may receive minor roof damage.
• Most well-constructed houses may suffer minor to moderate roof damage, with some experiencing major roof failure.
• Considerable airborne debris will be generated and may cause damage, injury, and possible fatalities.
• Vast majority of the trees will be broken, defoliated, or uprooted.
• Significant damage to banana and similar plants is likely.
• Banana and similar plants will be extensively damaged.
• Almost total damage to rice and other crops is expected.
• Diminished availability of potable water supply is likely.
• Near total loss of power supply and telecommunications is expected due to numerous downed power lines, poles, and cellular towers.
• Severe to catastrophic damage is expected to houses of poor or average construction, makeshift or old, dilapidated structures, and other structures made of light materials.