Forecaster: Isaac could later be a Cat 2 hurricane

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Shira Edllan Gervasi, of Israel, puts her name on plywood protecting a storefront in Key West, Fla., in anticipation of Tropical Storm Isaac on Saturday, Aug. 25, 2012. Isaac's winds are expected to be felt in the Florida Keys by sunrise Sunday morning. (AP Photo/Alan Diaz)A meteorologist at the National Hurricane Center says Tropical Storm Isaac, which is expected at or near hurricane-strength once it reaches the Florida Keys later Sunday, could become a category 2 hurricane in coming days as it takes eventual aim at the northern Gulf Coast.

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