For development of TSS, following conditions must be met:
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Over large ocean area. |
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Near seasonal location of equatorial trough or existing low pressure or depression. |
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In northern hemisphere, 5-25°N, in southern hemisphere 5-18°S, for sufficient Coriolis force. |
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Sea water temp 27°C or more. |
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Moves along 275-350° in northern hemisphere, 225-250° (WSW-SSW) in southern hemisphere. |
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Region of small vertical wind sheer. |
Updated: Saturday, 15 September 2007