Image credit: CIRA/RAMDIS
TROPICAL DISCUSSION - INTERNATIONAL DESKS
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
WED JAN 09 2008
...OVER THE CENTRAL ATLANTIC...
AT MID LEVELS...A LOW NEAR 25N 55W
SUPPORTS A TROUGH WITH BASE EXTENDING INTO THE EASTERN
CARIBBEAN/NORTHERN SOUTH AMERICA. THE TROUGH WILL REMAIN NEARLY
UNCHANGED THROUGH 36-48 HRS. BUT BY 60-84 HRS IT WILL START TO
WEAKEN AS THE SUBTROPICAL RIDGE TO THE WEST FLATTENS. AT LOW
LEVELS THIS TROUGH INDUCED AN INVERTED TROUGH ALONG 55(W)...WITH A
CLOSED LOW TO FORM ALONG THIS AXIS. THE GFS ONCE AGAIN FAVORS A
WARM CORE LOW LEVEL CYCLONE...WHILE AT UPPER LEVELS IT RETAINS ITS
COLD CORE CHARACTERISTICS.