Maybe I'm old school, but I still like Unisys Weather for a mix of layperson and met charts. Good jumping off point, especially in the Plains, but useful nationwide is the OU Met page som.ou.edu/wx and no I did not go to OU.
If you do not have access to the European model www.meteoblue.com has an approximation I believe. It is a European weather site. Click on North America weather maps and go from there using the tabs at the top of the chart. This is anecdotal only, but I think the clouds/rain is loosely based on European output. Enjoy!