Tropical storm Isaac which is currently in the Caribbean Islands, is expected to become a hurricane by Friday and could possibly make landfall in South Florida on Monday, according to weather forecasts.

Although there is uncertainty about the storm's direction, computer models cited by Reuters, showed Isaac making landfall in South Florida by late Sunday or early Monday. Currently the storm is moving through the Leeward Islands in the Caribbean with maximum sustained winds of 45 mph.

A hurricane watch is in effect for Puerto Rico and the South Coast of Dominican Republic, according to the National Hurricane Center.

"On the forecast track,,,the center of Isaac should move through the Leeward Islands during the next several hours...pass near or south of the virgin Islands and Puerto Rico on Thursday and approach the Dominican Republic Thursday night and Friday," the NHC informed today.

20 years ago, South Florida was hit by hurricane Andrew which in August 24th hit Dade county as a category 5 hurricane and caused an estimated $25 billion in damage, according to the South Florida's Weather Forecast Office.

In total, Andrew directly caused 26 deaths in the U.S. and indirectly caused 39 more. The number of homes destroyed was approximately 49,000, with an additional estimated 108,000 damaged, according to the federal agency.