Tracking The Tropics & Isaac

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A%20projection%20of%20Isaac%20as%20of%20Sunday.

The%20%26%238220%3Bspaghetti%26%238221%3B%20models%20for%20Sunday.

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This%20is%20the%20Saturday%20update%20for%20Isaac

Isaac%20also%20poses%20a%20possible%20threat%20to%20Florida%20during%20next%20week%E2%80%99s%20Republican%20National%20Convention%20in%20Tampa.

The%20U.S.%20National%20Hurricane%20Center%20says%20Isaac%20is%20expected%20to%20strengthen%20and%20could%20become%20a%20hurricane%20by%20Thursday.

According%20to%20computer%20modules%2C%20Issac%20will%20grow%20back%20into%20a%20category%201%20hurricane.

If%20Issac%20becomes%20a%20category%201%20hurricane%2C%20land%20mass%20will%20drop%20it%20back%20to%20a%20tropical%20storm.

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Isaac%26%238217%3Bs%20forecast%2C%20as%20of%20Sunday.