Update 12:30 PM CDT 6 September 2013
NHC has just announced that 99L is being upgraded, and advisories on TD8 (or a named storm) will be issued within the next hour or two.
Original Entry 11:30 AM CDT 5 September 2013
A very well developed area of low pressure in the far western Gulf of Mexico (99L) is pushing inland today, Sept 6, with heavy rains forecast for eastern Mexico.
After tracking across the Yucatan and developing a closed but broad circulation, Invest 99L appears to be getting much more organized today right as it is pushing inland. This can sometimes occur, as systems often tend to fold into themselves in response to running into land. Also, particularly in the western Gulf of Mexico, the general day-to-day windflow frequently favors cyclogenesis.
Invest 99L presently has maximum sustained winds of at least 35MPH, and is expected to produce widespread rains of up to 5", with locally much higher amounts possible.
A Special Advisory was issued by around 10:30AM CDT, anticipating that the system would be inland prior to becoming a tropical cyclone, but this looks like a very close call, and many of the same types of hazards will result from 99L at this point, regardless of further development.
Elsewhere in the Tropical Atlantic, x Tropical Storm Gabrielle is actually percolating just a little bit yet again today, and will continue to be watched for any signs of meaningful reorganization. A few other tropical waves are present, but conditions do not appear immediately favorable for their near-term development.
Invest 99L Event Related Links
Animated Model Plot of 99L
SFWMD Model Plot (Animated Model Plot) SFWMD Hurricane Page
Clark Evans Track Model Plot of 99L
(Animated!) Model Plots in Google Earth - In Google Maps
Clark Evans Intensity Model Plot of 99L (Animated!)
Clark Evans Track Plot of 99L
Other Model Charts from Clark
Clark Evans Top 10 Analog Storms for 99L
More model runs on from RAL/Jonathan Vigh's page
NRL Info on 99L -- RAMMB Info
Floater Satellite Images: