It is an unusual year where I'm at, I'd like to go and see similar climatological years for the north america, more particularly for average pressure, maybe 500mb or 700mb. How would I do this
Edit: Regional or State would be fine. Average pressure on a 1 month or seasonal basis.
Context: I am simply trying to compare the year, if there is a better way to do this than pressure, even temperature and precip would be nice. I'm looking to find simmilarities between years on a regional level. A map of average pressure on a seasonal basis would be awesome.
Region: North America regional, but the finer resolution the better
License: I'd like this to be free.
Format: Any format is acceptable.
Non-answers: I'm looking for more then the NOAA Climatic Data Center can provide.
Authority: Any source is acceptable