Weather Depiction Chart Legend. The weather depiction chart gives a broad overview of the observed flying categoryconditions at the valid time of the chart. The Weather Depiction Chart is generated from METAR observations and includes information on visibility current weather rain snow fog etc sky coverage and ceiling if applicable.
Frontogenesis is depicted on HPCs surface analysis and forecast charts as a dashed line with the graphical representation of the developing frontal type the blue triangle for cold fronts the. Cold Front - a zone separating two air masses of which the cooler denser mass is advancing and. Surface Fronts and Boundaries.
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AC 00-45D Aviation Weather Services lists 100 symbols for weather that are used on weather charts. Valid Time VT of the chart on the lower left corresponds to the time of the observations. Buttons Product View Area and Legend. Product Legends.