The document describes the use of weather maps and data in teaching introductory college courses in synoptic meteorology. Students examine weather changes at three-hour intervals from data obtained from the "Monthly Summary of Local Climatological Data." Weather variables in the local summary include sky cover, air temperature, dew point, relative humidity, wind direction, and wind speed. Atmospheric pressure data are obtained from "Surface Weather Observations" (National Weather Service). A specific study of the path of a cyclone indicates that the three, four, and six-hour interval studies offer accuracy in prediction whereas a two-hour interval study is not as accurate. Results also indicate that temperature is the most important variable for defining frontal boundaries. The author suggests using hourly pressure data as a supplement to the local summary. This combination should provide a sufficient data base for students to apply weather forecasting principles at shorter intervals of time. (KC)