John Williams, president and chief executive officer of the Federal Reserve Bank of New York, speaks during an Economic Club of New York (ECNY) event in New York, U.S., on Wednesday, March 6, 2019.

The U.S. economy is heading into a "new normal" of slower growth that likely will keep monetary policy restrained, New York Federal Reserve President John Williams said Wednesday.

After a year where the economy accelerated close to 3 percent, GDP likely will slow to 2 percent this year despite a mostly favorable backdrop domestically, the central bank official said in a speech to the Economic Club of New York. He cited three constraining factors: a global slowdown, geopolitical uncertainty and tighter financial conditions.