Home Page Objectives 1. Explain how the National Service Network works. Identify the directon in which weather moves across the United States. Read a Weather map. The weather map or chart is indispensable to the weather forecaster.
Meteorologists use it to compile and show the data they have collected on the weather.
The key factors that are recorded on weather maps include temperature, precipitation, cloud type and cover, wind speed and direction, and air pressure. All these data are used to trace the growth and decline of major weather systems often referred to as highs or lows. Using the WWW to access current weather maps will serve as a useful instructional tool. The maps use symbols to represent different aspects of the weather. Fronts are shown with heavy lines, and geometric shapes are used to differentiate warm and cold fronts.