Really everything off of "Expert Charts" from WeatherOnline, even if it is just for entertainment purposes
https://www.weatheronline.co.uk/cgi-bin/expertcharts?LANG=en&MENU=0000000000&CONT=namk&MODELL=cfs&MODELLTYP=7&BASE=-&VAR=weas&HH=2160&ARCHIV=0&ZOOM=0&PERIOD=&WMO=
- columnar meteograms
- automatic archiving of forecasts, or at least allow a user to specify an endpoint that those archives can be dumped