Garmin Flight Deck 100 Marine Instruments User Manual


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Embraer Prodigy
®
Flight Deck 100 Pilot’s Guide
190-00728-04 Rev. A
364
HAZARD AVOIDANCE
WEATHER MAPPING AND INTERPRETATION
WEATHER DISPLAY INTERPRETATION
When evaluating various target returns on the weather radar display, the colors denote precipitation
intensity and rates shown in the table.
Weather Mode Color Intensity
Approximate
Precipitation 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 6-3 Precipitation Intensity Levels
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.
•Inareaswherethedisplayedtargetintensityisredormagenta(indicatinglargeamountsofprecipitation),
the turbulence is considered severe.
•Areasthatshowsteepcolorgradients(intensecolorchanges)overthinbandsorshortdistancessuggest
irregular rainfall rate and strong turbulence.
•Areasthatshowredormagentaareassociatedwithhailorturbulence,aswellasheavyprecipitation.
Verticalscanningandantennatiltmanagementmaybenecessarytoidentifyareasofmaximumintensity.
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