Developing: Euro and old school 7th www.tropicaltidbits.com/analysis/models/ecmwf/2017112900/ecmwf_z500a_nhem_9.png Careful translating purple for each ~ I believe they have two meanings here. above/below max.nwstatic.co.uk/gfsimages/gfs.20171129/06/186/npsh500.png