The National Hurricane Center is issuing advisories on recently-downgraded Tropical Depression Marty, located about 445 miles west of the southern tip of Baja California. A small area of low pressure - "Invest 98" - located about 150 miles south-southeast of the southern tip of Baja California continues to produce shower and thunderstorm activity as it moves northwestward at around 10 mph. A tropical depression could form during next day or so before upper-level winds become less favorable for development. There is a high chance,greater than 50 percent, of this system becoming a tropical cyclone during the next 48 hours.

Original published on: Sep 19, 2009 @ 7:27