TROPICAL DEPRESSION FOUR ADVISORY NUMBER 3 | Main | Little change in TD 4
August 14, 2007
TROPICAL DEPRESSION FOUR DISCUSSION NUMBER 3
THE ORGANIZATION OF THE DEPRESSION HAS CERTAINLY NOT IMPROVED THIS
EVENING. THE OVERALL CONVECTIVE ENVELOPE APPEARS TO HAVE BECOME
ELONGATED EAST TO WEST AS THE DEPRESSION CONTINUES TO BE PLAGUED BY
STRONG UPPER-LEVEL EASTERLY WINDS. A QUIKSCAT PASS DURING THE
AFTERNOON CAUGHT THE EASTERN PORTION OF THE CIRCULATION AND IT
SUGGESTS THAT THE MAXIMUM WINDS REMAIN NEAR 30 KT. THE LATEST
DVORAK SATELLITE INTENSITY ESTIMATE ALSO SUPPORT 30 KT AND THE
CYCLONE WILL REMAIN A DEPRESSION FOR THIS ADVISORY.
THE INTENSITY FORECAST PHILOSOPHY REMAINS UNCHANGED FROM THE
PREVIOUS ADVISORY. MOST OF THE GUIDANCE SUGGESTS THAT THE SHEAR
WILL DECREASE DURING THE NEXT COUPLE OF DAYS ALLOWING THE CYCLONE TO
GRADUALLY STRENGTHEN. THE EXPLICIT INTENSITY GUIDANCE IS IN
REMARKABLY GOOD AGREEMENT AND THE OFFICIAL FORECAST IS UNCHANGED
FROM THE PREVIOUS ADVISORY.
FORECAST POSITIONS AND MAX WINDS
INITIAL 14/0300Z 12.0N 35.0W 30 KT
12HR VT 14/1200Z 12.0N 37.4W 35 KT
24HR VT 15/0000Z 12.0N 40.4W 40 KT
36HR VT 15/1200Z 12.2N 43.4W 45 KT
48HR VT 16/0000Z 12.6N 46.4W 50 KT
72HR VT 17/0000Z 13.8N 52.0W 60 KT
96HR VT 18/0000Z 16.0N 57.5W 75 KT
120HR VT 19/0000Z 18.5N 62.5W 90 KT



