There's no shortage of weather sites and webapps around the web that will show you weather conditions now or predicted ones in the future, but Ventusky is brand new, looks great and shows you current conditions on a live, always-updating map that you can drag around, click on or just search to explore. If you're used to using a service like Google Maps, then Ventusky will come naturally. Type in your location (if it's not automatically detected) to see your area, and a live map of temperature and wind patterns in your part of the world. You can adjust the altitude to see wind and cloud cover at different levels, or add more layers, like cloud cover, precipitation, wind speed and snow cover.
From there, you can browse other parts of the world, or select a span of time to play back temperature or wind changes, or the movement of cloud cover or storm systems. You can even view predicted information for the future, so you can see if you're going to get that storm this evening that a friend of yours out west mentioned in an email this morning. There's even a handy settings panel that walks you through the webapp's features and explains the nuance to you.
Even if you use another service for local forecasts and up-to-the-minute weather data, Ventusky is one of those sites you could probably bookmark for a while. Hit the link below to give it a shot.