Aviation Weather Services

Figure 13-15. Information page. age of the oldest NEXRAD data in the mosaic can exceed does not show the age of the actual weather conditions, the age indication in the cockpit by 15 to 20 minutes. Even but rather the age of the mosaic image. The actual weather small-time differences between the age indicator and actual conditions could be up to 15 to 20 minutes OLDER than conditions can be important for safety of flight, especially the age indicated on the display. You should consider this when considering fast-moving weather hazards, quickly developing weather scenarios, and/or fast-moving aircraft. At no time should the images be used as storm penetrating NORTH UP radar nor to navigate through a line of storms. The images display should only be used as a reference. NEXRAD NEXRAD radar is mutually exclusive of Topographic RAIN (TOPO), TERRAIN and STORMSCOPE. When NEXRAD is turned on, TOPO, TERRAIN, and STORMSCOPE are L H turned off because the colors used to display intensities are I E very similar. MIX G A Lightning information is available to assist when NEXRAD H V is enabled. This presents a more comprehensive picture of T SNOW Y the weather in the surrounding area. In addition to utilizing the soft keys to activate the NEXRAD display, the pilot also has the option of setting the desired SIGMET range. It is possible to zoom in on a specific area of the __/__ __:__ display in order to gain a more detailed picture of the radar display. [Figure 13-18] AIRMET What Can Pilots Do? __/__ __:__ Remember that the in-cockpit NEXRAD display depicts where the weather WAS, not where it IS. The age indicator Figure 13-16. List of weather products and the expiration times of each. 13-19