Wx

Wx is a specialized weather app for Mac OS X that downloads and processes weather information for the United States.

Wx displays current conditions, forecasts, warnings, and radar for U.S. locations using high fidelity XML data from the National Weather Service. The app is designed for two specific types of customers: serious weather watchers who want detailed information and facts with no fuss, and casual users who want a fast, clean, and functional weather app.
Wx is crafted with attention to detail by an award-winning software developer with over 20 years of experience. Wx 6 has been reinvented from the ground up for OS X 10.7 Lion, but the app's new design and features are available on Mac OS X 10.6 too. Under the hood, Wx 6 has all new download and processing engines, and is faster than ever. It's more reliable than ever too, offering multiple levels of redundancy to handle severe weather events that can strain NWS servers.