The web page that provides historical COOP data (both reported and recent estimated data by the IEM) has gotten a complete rewrite, so it warrants a note of caution here about its use. Please check over the data it provides and let us know of any issues you have with it.

The major new feature is the ability to append an arbitrary previous year onto the current year's data. The reason this was added is that some models want a complete year's worth of data. The download form allows you to optionally specify a previous year that should be appended onto this year's data. For example, you could request that data from 2013 be appended onto this year and the downloaded dataset will have 2013's data included as 2014 "observations" after today's date. Rewording, if today is 8 September 2014, data in the download for 9 September 2014 will actually be the data for 9 September 2013! Confused yet? :) Regardless, this is completely optional and not enabled by default.

As always, let us know of problems you encounter!