NEW YORK (Reuters) - The U.S. economy likely expanded at a 3.7 percent annualized rate in the third quarter, compared with government's advance reading of second-quarter growth at 1.2 percent last Friday, the Atlanta Federal Reserve's GDP Now forecast model showed on Thursday.

The latest third-quarter GDP estimate was a tad faster than the 3.6 percent figure calculated on Wednesday, the regional Fed said on its website.

(Reporting by Richard Leong)