Over the past year or so, I have recently developed quite an interest in weather websites. There are so many out there all with their own, slightly different focus. Some sites show weather forecasts for the general public while others show the same data from a much more technical point of view for those with a weather background.
There are several great weather websites with a focus on education. One of them is the USA Today Newspaper. It has a great resource section with lots of animated resources that clearly show the interaction of different elements of weather.
Another great website that I really like can be found at Weather Underground. I like to think of this site as the hangout for weather geeks. There are many different areas of this site that I like but probably the most useful for (for kayakers) is the marine section. Weather Underground has tapped into the off shore marine buoy network from around the world and has presented the information in a really unique way that makes the information a more relevant then other marine weather sites.
Click on the graphic on the right. It takes all the information collected from the buoy and displays it in a really interesting visual manor. It also allows you to view the weather in multiple views, either by the day, week or by the month.
The marine forecast page could also be a good teaching aid as you can easily show your students the interaction between temperature, wind, sea state and barometric pressure.