Dean was a storm of subtropical origin which originated within a frontal band east of an upper low
off the East Coast on September 22. Once the low level circulation formed on the 26th east of central
Florida, it was instantly a subtropical storm as gale force winds buffeted the portions of the Eastern
Seaboard. The system was a subtropical cyclone with maximum winds well-removed to the
northeast of the center. Guided by the parent upper low, Dean rotated cyclonically towards the
Mid-Atlantic coast and make landfall near the Virginia/Maryland border on the Eastern Shore on the
30th. The surface circulation dissipated soon after landfall, but Dean's rain shield edged northeast
through southern New England over the next couple of days ahead of its parent upper low. Below
is the track of this cyclone, constructed from data provided by the National Hurricane Center.
The graphics below show the storm total rainfall for Dean. The
maximum in Connecticut occurred after
the upper cyclone which spawned Dean induced new cyclogenesis offshore
New
England within its old
surface trough, which focused heavy rains north of the new low across
the state.
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