Quite a bit of data can be picked up from weather.com but things like cloud cover, etc I suppose the observer can sit at his laptop and look out of a window and write down how much cloud cover is there. Also if sites are selected for observation people can choose how many and which sites they will observe and enter the data. I can for example set up eleven tabs, ten for weather.com and one for log book. Whenever I open my browser the data of ten sites pop up, I just have to do the data entry not a tedious job, maybe five minutes. Now on weather.com you can in each tab set up favorites, as many as you want. In each tab if I set up ten sites then I can easily enter the data for 100 sites. Let people decide how many sites they are willing to observe and enter data. Not every one has the energy to handle 100 sites but still enough sites will be selected by volunteers that a comprehensive monitoring system can be set up. You may end up with a complete coloure coded chart.
Regards,
Arif.
