Useful weather information:
Seven-day Palo Alto weather (also see forecast discussions).
Graphical METAR/TAF for ZOA.
ADDS Weather (with links to AWC).
Experimental ADDS. FAA RAIM.
Hydrometeorological Prediction Center(Use the QPF item on the left to go to the 6-hr loop of predicted precipitation).
FOUS14 from NWS (for ceilings and visibilities forecasts) and how to interpret it.
Sunrise and sunset times.
Skew-T plots and how to interpret them. More info about Skew-T from NASA.
Lifted index can be found here select the Lifted Index Loop in the box in the left scrolling region.
Thunderstorm outlook prediction (from the Storm Prediction Center in OK, click on Tstms. outlook on the left).
Useful article by S. Dennstaedt in IFR magazine on getting a Wx brief.
Glossary: Precipitation symbols. Front symbols. Weather basics from USA Today.
Skyvector. VFR & IFR charts.
Basic airport information: Airnav.
FAA Safety Site