IntuVueRDR-7000 Weather Radar Pilot's Guide
D201911000094
Principles of Weather Radar Use
Rev 0, Feb 2020
49
Hail and lightning icons identify which cells are likely producers of
the associated hazard, but do not explicitly detect the present
location of the hail or the lightning. Since lightning and hail can
extend a significant distance from the core of the cell, the entire
cell should be considered as containing the hazard.
o
Icons are placed on the display at or near the center of the area
where the hazard-producing convection is located. It is
possible that a single icon could indicate the presence of a
number of separate hazardous convective cells in order to
avoid display clutter. To better resolve the individual convective
cells with hazards associated, select a lower display range. It is
possible for an icon to showand have no reflectivity displayed in
association with it. However, in this case it should be assumed
that the associated convective cell is covered by the icon, and
the presence of the hazard in the vicinity of the icon must be
assumed.
Cells with hail icon indications should be assumed to also be
producers of lightning.
Convective cells should be avoided by 20 nm. Characteristics of
convective cells include one or more of the following:
o
Cells with large vertical structure (as can be determined using
the manual mode)
o
Hail icons
o
Lighting icons
o
Turbulence indications.
For a build-up of scattered cells where it may not be practical to
observe the 20 nm avoidance guideline, plan a path upwind of the
cells with the lesser hazard while avoiding other cells by 20 nm. In
areas where the REACT field is shown, expect the possibility of
additional weather that may have to be avoided.
o
Generally, consider cells with any magenta turbulence and hail
icons as the most hazardous cells, then in order of decreasing
severity:
Cells with turbulence and lightning indications (no hail
indications).
Cells with no hazard icon, but with turbulence indicated.
Cells with reflectivity only, with maximum reflectivity of red.
Cells with reflectivity only, with maximum reflectivity of yellow.
Cells with reflectivity only, with maximum reflectivity of green.
