Tropical Storm Issac is picking up steam in the Caribbean and could develop into a hurricane by Thursday. If so, South Florida is one of the areas in danger.

The worst of the hurricane should not come until Sunday or Monday, likely missing the Miami Dolphins' preseason game with the Atlanta Falcons. However, some effects could still be felt.

They will have a more clear picture of the storm’s future Friday morning when the storm is expected to pass over the mountainous terrain of Hispaniola. Meteorologists say the move could weaken Isaac, but then the storm is expected to cross into the "very warm water between Cuba and Florida and strengthening appears likely," according to the NHC’s 8 a.m. forecast discussion.

The situation is being closely watched by the National Hurricane Center.

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