Garmin G1000 Cockpit Reference Guide for the Columbia 350/400 190-00567-01 Rev. A10-4SECTION 10 – HAZARDAVOIDANCEDisplaying Weather on the Weather Data LinkPage1) Turn the large FMS Knob to select the Map PageGroup.2) Turn the small FMS Knob to select the Weather DataLink Page.3) Select the available softkeys to select the desiredXM weather product.4) Select the LEGEND Softkey to view the legends forthe selected products. If necessary, turn either FMSKnob to scroll through the list. Press the small FMSKnob or the ENT Softkey to return to the map.Figure 10-9 Weather Data Link PageNEXRAD – Select the NEXRAD Softkey to showNEXRAD weather and radar coverage information.Areas where radar coverage is not available will beshown in grayish-purple. The display is updatedevery five minutes.NEXRAD LimitationsCertain limitations exist regarding the NEXRAD radardisplays. Some, but not all, are listed here:• NEXRAD base reflectivity does not providesufficient information to determine cloud layers orprecipitation characteristics (hail vs. rain, etc).• An individual NEXRAD site cannot depict highaltitude storms at close ranges, and has noinformation about storms directly over the site.• The resolution of displayed NEXRAD data is 4square kilometers. Therefore, when zoomed in onthe display, each square block is 2 kilometers oneach side. The intensity level reflected by the squarewill be the highest level sampled within the squarearea.ECHO TOP – Select the ECHO TOP Softkey toshow the location, elevation, and direction thehighest radar echo. This may not indicate the topof a storm or clouds, only the highest radar returnecho. ECHO TOPS cannot be displayed alongwith NEXRAD and CLOUD TOPS. When ECHOTOPS is activated, NEXRAD and CLOUD TOPS areremoved. Refer to the Legend for a description ofthe ECHO TOPS coding. The display is updatedevery 7.5 minutes.CLD TOP – Select the CLD TOP Softkey to show thecloud top altitude determined from satellite imagery.The display is updated every 15 minutes.LTNG – Selecting the LTNG Softkey shows the locationof cloud-to-ground lightning strikes. The display isupdated every five minutes.NOTE: Strikes depicted represent cloud to groundstrikes within a 2 kilometer radius of the actualstrike location. Therefore, the exact location ofthe strike is not displayed.