Her appearance before the committee had been set for earlier this month but was delayed by a winter storm.
As in her first appearance before the House Financial Services panel, Yellen is expected to avoid talking about the central bank’s next steps.
“She will try not to opine on what might happen at the Fed’s March meeting or how the data might be read,” said Michael Feroli, chief U.S. economist at J.P. Morgan Chase.
“She’s good at not saying what she doesn’t want to say,” he said.
In her testimony, Yellen signaled the Fed is committed to the path of gradually reducing the pace of its asset purchase program.
Yellen is likely to be pressed on whether the economy is slowing down or if the data is just being impacted by numerous snow storms.
“She’ll reply that it is hard to know for sure and we’ll have to assess that at the next meeting,” Feroli said.
The senators have one leg up over their House colleagues. Since Yellen testified, the Fed released minutes of the central bank’s January meeting that highlight several areas of disagreement among policy makers.