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Pilot's Guide

ManualsBrandsGarmin ManualsFlight DecksGarmin MDL Rev 8, SA01456Wi_D
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Garmin G1000 Pilot’s Guide for the Hawker Beechcraft C90A/GT/GTi
190-00663-02 Rev. B336
HAZARD AVOIDANCE
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.
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,ngers,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areredormagenta.
Figure 6-59 Cell Irregularities
Steep Gradient
Squall Line
Hook or Finger
Scalloped Edge
Thunderstormdevelopmentisrapid.Acoursemaybecomeblockedwithinashorttime.Whendisplaying
shorterranges,periodicallyselectalongerrangetoseeifproblemsaredevelopingfurtherout.Thatcan
help prevent getting trapped in a blind alley or an area that is closed at one end by convective weather.