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Redevelopment of a Warm-Core Structure in Erin: A Case of Inland Tropical Storm Formation

Remarkable radar and satellite imagery are presented to illustrate the unusual inland reintensification of Tropical Storm Erin over Oklahoma during the evening of 18 August 2007 to the early morning hours of the 19th. Using a blend of objectively and subjectively produced analyses, the authors document the warm-core nature of the disturbance as it reorganized. The evidence presented suggests that attention on such disturbances should remain under tropical forecasting domains, even though presently accepted conventions preclude assigning tropical storm nomenclature to such a system.