Tropical Cyclone Wind Signals: Difference between revisions - Wikipedia

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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 TCB also contains a plain-text discussion of the hazards threatening land and coastal waters and the PAGASA's track and intensity outlook for the cyclone.

PAGASA activates the five-tiered ''Tropical Cyclone Wind Signal'' (TCWS) system once it is determined that the tropical cyclone inside the PAR is going to directly affect the Philippines and its outermost [[Tropical cyclone windspeed climatology#Winds in tropical cyclones|cyclonic winds]] isare at least 36 hours away from reaching the nearest Philippine landmass. Wind signals under the TCWS system are hoisted primarily at [[Cities of the Philippines|city]]/[[Municipalities of the Philippines|municipal]] or [[Provinces of the Philippines|province]] level. An exception to this is [[Metro Manila]], which is collectively placed under a single wind signal level. All TCWS signal levels in effect in various localities affected or to be affected by tropical cyclone winds are enumerated in each TCB issuance, including the escalation, de-escalation or lifting of such signal levels. Wind signals are hoisted and updated (escalated, de-escalated or lifted) usually in regular time intervals coinciding with the release of a TCB:<ref>{{Cite web |last=Perez |first=Chris |date=October 26, 2018 |title=Public Weather Forecast Issued at 4:00 AM October 26, 2018 |url=https://www.youtube.com/watch?v=zYg0OqiKIY0&t=663s |access-date=August 24, 2022 |website=YouTube |publisher=Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA)}}</ref>

*6-hourly TCB issuance: when TCWS signals levels have been raised as the tropical cyclone approaches the Philippine landmass (5:00{{nbsp}}a.m./p.m. and 11:00{{nbsp}}a.m./p.m. [[Philippine Standard Time|PHT]]).

*3-hourly TCB issuance: when (a) the tropical cyclone is about to make [[landfall]] within the next 24 hours; (b) during land crossing and directly after land crossing when the tropical cyclone starts to move over water away from land; (c) the tropical cyclone remains offshore but is significantly close to the landmass, warranting the activation of TCWS signals (2:00{{nbsp}}a.m./p.m., 5:00{{nbsp}}a.m./p.m., 8:00{{nbsp}}a.m./p.m. and 11:00{{nbsp}}a.m./p.m. PHT).