Oklahoma Mesonet
University of Oklahoma: High and Low Pressure
This University of Oklahoma meteorology tutorial explores both high and low pressure systems--how they form and the different forms they take.
University of Oregon
University of Oregon: Coriolis Effect
This site from the University of Oregon provides a great explanation of the Coriolis Effect and then gives several chart type examples to help the understanding of it.
University of Wisconsin
Atmospheric and Oceanic Sciences: Surface Weather Analysis
Explains the use of synoptic weather analysis in preparing weather maps and forecasting. Discusses the use of symbols as well.