WASHINGTON — The Federal Reserve chair, Jerome H. Powell, warned lawmakers on Tuesday that the coronavirus epidemic sweeping China could pose broader economic risks, even as he signaled that the central bank was comfortable holding interest rates steady for now.

“We are closely monitoring the emergence of the coronavirus, which could lead to disruptions in China that spill over to the rest of the global economy,” Mr. Powell told House Financial Services Committee members.

The central bank chief is also set to testify before the Senate Banking Committee on Wednesday.

The Fed is treading cautiously as the economy continues to add jobs but inflation remains low. An initial trade deal with China has eased one major source of economic uncertainty, but tariffs remain on Chinese goods and tensions with other nations could reignite. And the new virus — which has killed more than 1,000 people and sickened tens of thousands — has emerged as an economic wild card.

“Some of the uncertainties around trade have diminished recently, but risks to the outlook remain,” Mr. Powell said. Still “the current stance of monetary policy will likely remain appropriate” as long as incoming economic information remains in line with the Fed’s outlook.