First of all I want to tell how awesome is your app, is the best comprehensive weather info one could hope to find; at least in a user friendly interface and lot of info in one place. You have my all my thanks for that.
But I want to make some suggestions. The Cuban Meteorology Institute has covered most of the Caribbean with meteorological radars and I see that you have only included the US and Puerto Rico radars. It would be good if you could talk with the institute of Cuba to add their radars to the ones you already have. Cause all the radars in Cuba are digital and are transmitted via the internet to their website http://www.met.inf.cu/asp/genesis.asp?TB0=PLANTILLAS&TB1=RADARES and in particular for explample http://www.met.inf.cu/asp/genesis.asp?TB0=PLANTILLAS&TB1=RADAR&TB2=../Radar/07Holguin/hlgMAXw01a.gif so I think is easy to include to the one you already. That would be a great add to Windy.
Also they offer some other info that maybe you would like to include and also have cameras to show the actual weather as it happen.
Best Regards Adrian
PD: If you have any question or need any help with that, please ask me I would gladly help you with the coordinations or translating to english or warever you need. this is my personal mail firstname.lastname@example.org