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A South Atlantic Tropical Cyclone? Most literature dealing with tropical weather would agree: hurricanes are unknown over the southern Atlantic Ocean. Yet, as of early Friday, a storm with a well-formed eye about 300 miles east of southern Brazil has all the look of a hurricane. If indeed this is a tropical cyclone, it did not begin in the usual way; rather, it began as an ordinary "cool" trough that sat over warm seas for a few days. The atmospheric setting must have been "just right" to allow this trough to strengthen markedly while altering from cool-core to warm-core, and thus tropical, in nature. [continued]
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