Rich B
(British Meteorologist)
Sat Dec 29 2007 01:56 PM
Re: 2550SM East of Central Florida

From the latest TWD:

...SPECIAL FEATURE...

INTERESTING FEATURE FOR THE DAY IS THE DEEP CYCLONE CENTERED
NEAR 27N38W. THIS SYSTEM HAS REMAINED STATIONARY FOR A COUPLE OF
DAYS AND ORGANIZED CONVECTION IS DEVELOPING IN A COUPLE OF BANDS
LOCATED TO THE EAST OF THE CENTER. QUIKSCAT WINDS SUGGEST THAT
THERE ARE SOME GALE FORCE WINDS ALONG THE NORTHERN SEMI-CIRCLE
AND SE QUADRANT OF THE SYSTEM...THAT SEEMS TO BE ACQUIRING SOME
SUBTROPICAL CHARACTERISTICS. THE MOST COMMON TYPE OF SUBTROPICAL
CYCLONE IS AN UPPER-LEVEL COLD LOW WITH CIRCULATION EXTENDING TO
THE SURFACE...AS IN THIS CASE. ACCORDING TO THE UW-CIMSS
PRODUCTS...VERTICAL SHEAR ON THE SYSTEM IS RELATIVELY WEAK...BUT
THIS LOW-MODERATE SHEAR ENVIRONMENT MAY ONLY LAST FOR ANOTHER
DAY OR SO BEFORE STRONG UPPER WESTERLIES IMPACT THE SYSTEM WITH
THE APPROACH OF A VIGOROUS SHORT-WAVE TROUGH. THE CYCLONE SHOULD
MEANDER IN PLACE FOR THE NEXT 24-36 HOURS OR SO. SOME OF THE
MODEL GUIDANCES MOVE THIS SYSTEM TO THE SW ACROSS THE OPEN OCEAN
WATERS. THIS SYSTEM COULD BECOME A SUBTROPICAL CYCLONE AT ANY
TIME.