WINTER CYCLOGENESIS WITH TROPICAL CHARACTERISTICS OVER THE GULF STREAM

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  • 1 National Meteorological Center, Weather Bureau, ESSA, Suitland, Md.
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Abstract

An extratropical cyclone associated with the subtropical jet stream and the interaction of continental polar and maritime tropical air masses originated in the subtropics and moved northeastward off the East Coast of the United States. The storm moved first parallel to, and then briefly over the center of the Gulf Stream. As it moved over the warmest water of the Gulf Stream, its inner core appeared on radar to be similar to a tropical cyclone. There was a strong correlation between the radar banding and weather resembling that experienced in the spiral bands of hurricanes.

Abstract

An extratropical cyclone associated with the subtropical jet stream and the interaction of continental polar and maritime tropical air masses originated in the subtropics and moved northeastward off the East Coast of the United States. The storm moved first parallel to, and then briefly over the center of the Gulf Stream. As it moved over the warmest water of the Gulf Stream, its inner core appeared on radar to be similar to a tropical cyclone. There was a strong correlation between the radar banding and weather resembling that experienced in the spiral bands of hurricanes.

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