Hi there! I understand your Dark Sky Weather app's radar isn't working. To help you better, could you share a bit more? For example, are you seeing a blank screen, or is the radar layer not loading at all? Also, have you already tried any fixes like restarting the app or checking your internet connection?

Meanwhile, here are some common steps that often resolve radar issues in weather apps on Windows devices:

1. Check Internet Connection: Make sure your device is connected to a stable internet network. Radar data requires a good connection to load properly.

2. Clear Browser Cache and Cookies: Since you mentioned WebKit browser on Windows, clearing the cache and cookies can sometimes fix loading issues that cause radar to fail.

3. Refresh or Restart the App: Close the app or browser tab completely and then reopen it.

4. Update the App or Browser: Ensure that the browser or app is up to date, as older versions might have bugs with radar layers.

5. Check Location Permissions: Radar often depends on location data to show relevant weather. Make sure your browser or app has permission to access your device location.

6. Try Incognito or Private Mode: See if the radar loads in a private browsing window, which can help identify if extensions or cache are blocking the radar.

If these don't help, sometimes the radar layer can fail due to backend API updates or temporary outages, especially since Dark Sky’s data has integrated into Apple's WeatherKit recently. If you want, I can help you check for any known current issues or guide you through more advanced troubleshooting.

Let me know what you've tried or seen so far, and we can take the next step! Are you able to access the radar at all right now?