Weather Radar 
Weather Radar is an open-source application featuring doppler radar images from the United States National Weather Service.
The images are single images based on location rather than tiled images that can be panned like most other applications of this type. This allows faster loading when connection speeds are sub-optimal. You can save your favorite views for easy reference.
National Weather Service radar imagery is available for the United States and its territories.
NOTE: This application used to support radar images from Weather Underground. Unfortunately they decided to terminate their API in favor of overpriced "Weather Data Packages" from weather.com after being bought out by IBM. Support for Weather Underground images has been removed with version 1.1 now that they no longer work.
Downloading
APKs are also available on the releases page.
Screenshots
Support
If you find it useful, please consider supporting my work here: https://dh4.github.io/donate/
Development Builds
An automatic debug build of the latest git commit can be found here. This can be installed alongside the release version: https://s3.amazonaws.com/dh4/weather_radar/master/com.danhasting.radar.devel.apk
Privacy
Weather Radar does not collect user data of any kind.