Describe a weather depiction chart.

Description should include the following:

• A weather depiction chart details surface conditions as derived from METAR and other surface observations.
• The weather depiction chart is prepared and transmitted by computer every three hours, beginning at 0100Z, and is valid at the time of the plotted data.
• It is designed to be used for flight planning by giving an overall picture of the weather across the United States.

PLT289

Process/Skill Questions:

• How is a weather depiction chart used by pilots?