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4-71190-01102-02 Rev. B
Garmin G500 Pilot’s Guide
Foreword
Sec 1
System
Sec 2
PFD
Sec 3
MFD
Sec 4
Hazard
Avoidance
Sec 5
Additional
Features
Sec 6
Annun.
& Alerts
Sec 7
Symbols
Sec 8
Glossary Appendix A
Appendix B
Index
Weather Mode
Color
Approximate
Intensity
Approximate
Rainfall Rate
(in/hr)
BLACK < 23 dBZ < .01
GREEN 23 dBZ to < 32 dBZ .01 - 0.1
YELLOW 32 dBZ to < 41 dBZ 0.1 - 0.5
RED 41 dBZ to < 50 dBZ 0.5 - 2
MAGENTA 50 dBZ and greater > 2
Table 4-17 Precipitation Intensity Levels
4.8.5.2 Thunderstorms
Updrafts and downdrafts in thunderstorms carry water through the cloud.
The more severe the drafts, the greater the number and size of the precipitation
droplets. With this in mind, the following interpretations can be made from
what is displayed on the weather radar. Avoid these areas by an extra wide
margin.
•Inareaswherethedisplayedtargetintensityisredormagenta(indicating
large amounts of precipitation), the turbulence is considered severe.
•Areasthatshowsteepcolorgradients(intensecolorchanges)overthinbands
or short distances suggest irregular rainfall rate and strong turbulence.
•Areasthatshowredormagentaareassociatedwithhail or turbulence, as
well as heavy precipitation. Vertical scanning and antenna tilt management
may be necessary to identify areas of maximum intensity.
Along squall lines (multiple cells or clusters of cells in a line), individual cells
may be in different stages of development. Areas between closely spaced, intense
targets may contain developing clouds not having enough moisture to produce
a return. However, these areas could have strong updrafts or downdrafts.
Targets showing wide areas of green are generally precipitation without severe
turbulence.
Irregularities in the target return may also indicate turbulence, appearing as
“hooks,” “fingers,” or “scalloped” edges. These irregularities may be present in
green areas with no yellow, red, or magenta areas and should be treated as highly
dangerous areas. Avoid these areas as if they were red or magenta areas.