Spotting Hail; Hail Size Probability - Honeywell Primus 880 Pilot's Manual

PRIMUSr 880 Digital Weather Radar System
100%
80%
60%
40%
20%
0%
LEVEL 2
YELLOW

Spotting Hail

As previously stated, dry hail is a poor reflector, and therefore
generates deceptively weak or absent radar returns. When flying above
the freezing level, hail can be expected in regions above and around wet
storm cells found at lower altitudes. The hail is carried up to the
tropopause by strong vertical winds inside the storm. In large storms,
these winds can easily exceed 200 kt, making them very dangerous.
Since the core of such a storm is very turbulent, but largely icy, the red
core on the radar display is weak or absent and highly mobile. The
storm core can be expected to change shapes with each antenna scan.
Radar Facts
5-48
1/4"HAIL
1/2"HAIL
LEVEL 3
RED

Hail Size Probability

Figure 5- 35
3/4"AND LAGER HAIL
LEVEL 4
MAGENTA
A28- 1146- 102- 00
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