I didn't know I could put GRLevel 3 on my website. I was thinking more along the lines of a weather station and software link for sites?
Yes you can add GRLevel3 to your site. It has the capabilities to upload images to your site. The their are several placefiles you can add for color tables, maps, etc. Best resource to find information GRLevel3 stuff is here...
http://www.grlevelxstuff.com/ Then you will need a weather station, most popular and the best for the money is a Davis Vantage Pro 2. It has all the bells and whistles you need and has add ons and it the most accurate on the market. Then to send that information to the internet from your console you will need WeatherLink, get the Serial version. The you can get Weather Display software to display it on your web site. You can use the Carter lake templates to display it or ever HamWeather. Their is so much more stuff you can add. The best bet instead of reinventing the wheel is just browsing the forum and do searches for what you are looking for. It has a wealth of information and you will probably find your answers you are looking for faster.