I work in this field, it's not that hidden. Here are some helpful links:
Sea Ice Thickness, freeboard, + lots of extras if you know how to plot netCDF
https://n5eil01u.ecs.nsidc.org/ICEBRIDGE/RDEFT4.001/
http://data.seaiceportal.de/gallery/index_new.php?lang=en_US&active-tab1=method&active-tab2=satellite
http://www.cpom.ucl.ac.uk/csopr/seaice.html
Good general reference:
https://sites.google.com/site/arcticseaicegraphs/
Arctic weather forecasts:
https://www.tropicaltidbits.com/analysis/models/?model=gfs®ion=nhem&pkg=z500a&runtime=2018010212&fh=-12