But slowing economic growth in the first quarter of 2015, slow wage growth, and stubbornly low inflation could put those plans on hold. Minutes released on Wednesday, which give a window into the policy discussion that occurred during the Federal Open Market Committee’s March 17 and March 18 meetings, add to the argument of those who believe the Fed won’t raise rates until at least the September meeting, and maybe later.

Make no mistake, there is support on the committee for a June increase, at least as of last month. “Several participants judged that the economic data and outlook were likely to warrant beginning normalization at the June meeting,” reads one section of the minutes. But those voices are certainly balanced by those who believe “conditions . . . would not be appropriate to begin raising rates until later in the year.” Meanwhile, the minutes read, “a couple of participants suggest that the economic outlook . . . would not call for liftoff until 2016.”

That passage shows that there is some support for a June hike on the committee, but those in favor appear to be outgunned by those who aren’t. At the same time, other passages clearly show a growing concern about recent economic data. A few key points:

• FOMC members are expressing concern about lousy initial readings of GDP in the first quarter of 2015, as well as the chance that a slowing Chinese economy or the Greek debt situation could deal blows to global growth;
• Members are worried about the lack of wage growth. While wage growth isn’t a first-order objective of the central bank, there are FOMC members who see wage growth as a very important signal of full employment; and
• The Fed doesn’t have a great theory as to why inflation remains stubbornly low. The market expects inflation to remain below the Fed’s target for many years to come, but this doesn’t square with the Fed’s idea that the economy will be more or less back to normal in two years time. It’s difficult to see how the Fed justifies normalizing rates in an environment where there’s no clear evidence of full employment or 2% inflation, and no clear theory as to how we get from here to there.

There’s still a chance that interest rates will go up in June. But recent data and March’s minutes argue against betting on it.

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