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The cyclones pictured are (west to east) Gerry, Hape, Isha, and Fiona of the 2003 Southwest Indian cyclone season. Terra satellite passed over this area in the morning, moving east to west, and contributing the first and third chunks of the image (from right to left).
Tropical cyclones are named for historical reasons and so as to avoid confusion when communicating with the public, as more than one tropical cyclone can exist at a time. Names are drawn in order from predetermined lists. They are usually assigned to tropical cyclones with one-, three-, or ten-minute windspeeds of at least 65 km/h (40 mph).
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.
A tropical cyclone is a storm system characterized by a low-pressure center and numerous thunderstorms that produce strong winds and flooding rain. [45] A tropical cyclone feeds on heat released when moist air rises, resulting in condensation of water vapour contained in the moist air. [45]
Tropical Cyclone Wind Signals (TCWS) [1] Warning Signal Meaning TCWS #1 winds of 39–61 km/h (21–33 kn; 24–38 mph)
Out of all these tropical cyclones, Typhoon Tip had the lowest atmospheric pressure measured in a tropical cyclone, at 870 mbar (25.69 inHg). It is the third image in the first row. This is a list of the most intense tropical cyclones as measured by minimum atmospheric pressure at sea level.
Tropical cyclone naming – once a tropical cyclone reaches winds of 34 kt (39 mph), a name would be given to that specific cyclone. Names are usually given by their respective RSMCs when the cyclone reaches tropical storm status. History of tropical cyclone naming – history of tropical cyclone naming from the late 18th century onward.
Tropical cyclones portal This category covers the history and meteorology of specific tropical cyclones , including hurricanes and typhoons. Meteorological causes, phenomenology, and physical principles of tropical cyclones are covered in category:tropical cyclone meteorology .