Tropical Depression #10 - September
18-23, 2007
Tropical Depression Ten formed in part from a decaying frontal
boundary that became
stationary off the Southeast U. S. coast on September
17th. By the 18th, an upper level
low formed over Florida and the eastern Gulf of Mexico as a tropical
wave moved over
the Bahamas. A surface low was spawned by this combination of
features near the western
Bahamas by afternoon. The system moved north-northwest into
east-central Florida before
a high to its north blocked any further northward progression.
Combined with steering from
the upper low to the west, the low crossed through central Florida
emerging into the eastern Gulf
of Mexico west of Tampa by the 20th. On the 21st, thunderstorm
activity increased near its
low level center, and the convection became organized enough around the
surface low for it to
be considered a subtropical depression 45 miles southwest of
Appalachicola. It gained tropical
character later in the day, becoming a tropical depression. The
system moved northwest into
the extreme western Florida panhandle as a tropical depression late on
the 21st near Fort Walton
Beach. Its central convection quickly weakened, but the surface
low continued moving west-
northwest across the Deep South before losing identity as it crossed
the Sabine River into Texas
early on the 23rd. Below
are
the storm total
graphics, prepared with data from the NWS River
Forecast Centers.