Dedicated basemap
I found the interpretation of the meteo gribs a bit difficult without a superimposed wireline besemap. It would be nice to add a custom basemap on the fly or connect to a remote service, butut I can't find a good wms or wfs wireline service. the better I found is a Netzen.org MVT water and boundary layer (Vector tile) downloadable by Vector tiles reader plugin, but it is a bit tricky to add to qQGribDownloader. Another solution would be attach Naturalearth coastline, administrative boundaries and POIs layers (about 2.5 mb)