Dudley comments may have added to the upside.

A fall in EUR/USD below 1.0850 to 1.0824 helped give the US dollar a broad lift. NY Fed President Dudley also said that a June rate hike is still possible if the economy is strong and unemployment dropping but the 'bar is probably a little bit higher'.

He also said there are strong arguments for being 'a bit on the late side' for liftoff.

As the day wears on, worries about the euro may expand with Greece due to pay $425 million to the IMF tomorrow.

Elsewhere, USD/CAD got an especially strong lift after the options cut, rising to 1.2468 from 1.2450. The sizes in today's expiries were small so it's tough to tie it to that but there is nothing else on the wires. Oil dropped late in US trading yesterday on the API data and there could be some jitters ahead of the EIA oil data at the bottom on the hour.