http://itunes.apple.com/us/app/radar...88419283?mt=8#

What's New In Version 1.6.0
RadarScope 1.6 includes the following new features:

- Warning polygons for Tornado Warnings (RED), Severe Thunderstorm Warnings (YELLOW), and Flash Flood Warnings (GREEN) issued by the NWS.
- Support for Fast App Switching
- iPhone 4 Retina Display support
- Bug fixes