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PAGASA's Tropical Cyclone Intensity Scale [1] [2] Category Sustained winds Super typhoon (STY) ≥185 km/h ≥100 knots: Typhoon (TY) 118–184 km/h 64–99 knots: Severe tropical storm (STS) 89–117 km/h 48–63 knots: Tropical storm (TS) 62–88 km/h 34–47 knots: Tropical depression (TD) ≤61 km/h ≤33 knots
TCWS #1 winds of 39–61 km/h (21–33 kn; 24–38 mph) are prevailing or expected to occur within 36 hours: TCWS #2 winds of 62–88 km/h (33–48 kn; 39–55 mph) are prevailing or expected to occur within 24 hours
Whenever a tropical cyclone forms inside or enters the Philippine Area of Responsibility (PAR), the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) commences the release of Tropical Cyclone Bulletins (TCB) to inform the general public of the cyclone's location, intensity, movement, circulation radius and its forecast track and intensity for at most 72 hours.
The Philippines is a typhoon-prone country, with approximately twenty tropical cyclones entering its area of responsibility per year. Locally known generally as bagyo (), [3] typhoons regularly form in the Philippine Sea and less often, in the South China Sea, with the months of June to September being the most active, August being the month with the most activity.
A very intense tropical cyclone is the highest category on the South-West Indian Ocean Tropical Cyclone scale, and has winds of over 115 knots (213 km/h; 132 mph). [24] [25] At the tenth RA I tropical cyclone committee held during 1991, it was recommended that the intensity classifications be changed ahead of the 1993–94 tropical cyclone season.
The Philippine Atmospheric, Geophysical and Astronomical Services Administration (Filipino: Pangasiwaan ng Pilipinas sa Serbisyong Atmosperiko, Heopisiko at Astronomiko, [4] abbreviated as PAGASA, which means "hope" as in the Tagalog word pag-asa) is the National Meteorological and Hydrological Services (NMHS) agency of the Philippines mandated to provide protection against natural calamities ...
Highest Tropical Cyclone Warning Signal raised by PAGASA across the Philippines in relation to Typhoon Koppu (Lando) April 5, 2015: A weakening Tropical Storm Maysak (Chedeng) hits Cagayan Valley, killing only 5 people. May 8–10, 2015: Typhoon Noul (Dodong) hits the northwestern tip of Luzon as a Category 5 super typhoon.
Since 1963, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) has assigned local names to a tropical cyclone should it move into or form as a tropical depression in their area of responsibility located between 135°E and 115°E and between 5°N-25°N, even if the cyclone has had an international name assigned to it.