A Facebook aquaintance clued me into a great weather resource for Lake Tahoe: the Weather Geek, a feature of TahoeLoco.com. I checked it out and was instantly impressed by the thoroughness of the reporting. This may become my first stop for weather forecasting.
First, there is a discussion:
Then temperatures and dewpoint plots:
The sidebar is filled with radar and images taken from several sites:
The result is a great site for looking up near- and long-term weather forecasting. Forecasts are posted weekly on Thursday, and there's an email subscription service. Not really good for finding out what happened last night, but great for developing a plan for next weekend. Check it out here.