The old Weather binding is still supported I think. It supports ForcastIO, OpenWeatherMap, WorldWeatherOnline, Wunderground, Hamweather, and MeteoBlue.
There is also a Yahoo Weather binding, but I think it is a little flaky and doesn’t report much.
Beyond that, you will need to figure out the API available and use the HTTP binding to query the data and parse the values out of it. You can look at Comprehensive Wunderground using HTTP Binding Example for an example of how I did this for Wunderground at some point.
I think most Wunderground users on this forum have migrated to OpenWeatherMap.
This will get the values into OH into Items. You will need to use a Webview pointing to Oz_Weather’s radar map to make it available on your sitemap or HABPanel.