Invest 94L has been upgraded to Tropical Depression Nine as of 5:00 AM EDT 21 August.

TD 9 is presently centered near 15.2N 51.2W, and movement is to the west at around 20 MPH.

Nine's minimum central pressure is estimated to be down to 1007mb, and maximum sustained winds are about 35 MPH. These estimates could be a little conservative, and Nine may be upgraded to Tropical Storm Isaac at any time.

The following watches and warnings have just been issued:

THE METEOROLOGICAL SERVICE OF BARBADOS HAS ISSUED A TROPICAL STORM WARNING FOR DOMINICA.

THE GOVERNMENT OF FRANCE HAS ISSUED A TROPICAL STORM WARNING FOR GUADELOUPE...DESIRADE...LES SAINTES...MARIE GALANTE...AND ST. MARTIN.

THE GOVERNMENT OF ANTIGUA HAS ISSUED A TROPICAL STORM WARNING FOR ST. KITTS...NEVIS...ANTIGUA...MONTSERRAT...AND BARBUDA.

THE GOVERNMENT OF CURACAO HAS ISSUED A TROPICAL STORM WATCH FOR SABA...ST. EUSTATIUS...AND ST. MAARTEN.

THE GOVERNMENT OF ANTIGUA HAS ISSUED A TROPICAL STORM WATCH FOR THE BRITISH VIRGIN ISLANDS.

A TROPICAL STORM WATCH HAS BEEN ISSUED FOR PUERTO RICO...VIEQUES... CULEBRA...AND THE U.S. VIRGIN ISLANDS.