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Tropical Cyclone BasicsRelated Terms
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In Context
Super typhoons such as Haiyan (Yolanda) in 2013 and Rai (Odette) in 2021 are associated with catastrophic storm surge and structural damage well inland from the coast.
Related Terms in Tropical Cyclone Basics
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Extratropical Cyclone
An extratropical cyclone is a storm system that draws its energy from temperature contrasts between air masses rather than warm ocean water, unlike a tropical cyclone.
Low Pressure Area (LPA)
A low pressure area, or LPA, is a region where atmospheric pressure is lower than its surroundings, often the earliest stage PAGASA flags before a system strengthens into a tropical depression.
Post-Tropical Cyclone
A post-tropical cyclone is a former tropical cyclone that has lost its tropical characteristics, such as a warm core, but can still produce heavy rain and strong wind.
Remnant Low
A remnant low is what remains of a tropical cyclone after its organized circulation and rain bands have broken down, though the low pressure center may persist.
Severe Tropical Storm
A severe tropical storm has maximum sustained winds between 89 and 117 km/h, one step below typhoon strength.
Tropical Cyclone
A tropical cyclone is a rotating low pressure weather system that forms over warm ocean water and draws its energy from heat released as moist air rises and condenses.
Tropical Cyclone Bulletin
A tropical cyclone bulletin is PAGASA's regularly updated advisory covering a storm's position, intensity, forecast track, and wind signals in effect.
Tropical Depression
A tropical depression is a tropical cyclone with maximum sustained winds of 55 km/h or less, the first classification stage under PAGASA's wind signal system.
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This definition is part of the azifind.com Typhoon Wiki, informed by PAGASA and the World Bank/GFDRR catastrophe risk data used across our province pages. View all Typhoon Wiki terms →