Panel Forecast Bar, in addition to weather information displays including:
Current conditions, high and low temperature, cloud conditions, and relative humidity
Brief description of the weather in the next hour, and in the next 24 hours
Animated diagrams showing the temperature and rain forecasts over the next 8:00
When the rain is expected within the hour, you will be given an animated graph showing the intensity of rain
5-day forecast with high and low temperatures and weather conditions
Stunning animated icons for each state of the weather
Full description of local adverse weather conditions and alerts (US only), including notification center Notification
and much more

What's new in Version 2.1.1
Improved Saved Locations: easily add (using auto-complete), rename, rearrange and remove locations.
New keyboard shortcuts to switch between saved locations
Improved menu bar text size
Improved severe weather alerts layout
Improved moon icons to more clearly show moon phase
Improved location performance and bug fixes
Bug fixes in notifications

OS - MacOSX 10.10 or Later