The IEM has been archiving National Weather Service Model Output Statistics (MOS) since early 2007. This dataset provides processed weather model forecasts based on local site statistics.

I finally got around to adding a simple app for you to download from this archive. At this time, you do need to know your local site identifier, but if you are interested in MOS data, you probably already know it :) Yeah, the weather nerd factor on this dataset is rather high.

All MOS sites are archived, not just Iowa nor United States.