PRIMUS
r
880
Digital
W
eather
Radar
System
A28-1146-102-00
RadarFacts
5-48
RELATIVEFREQUENCY
60%
40%
20%
0%
80%
100%
1/2”HAIL
1/4”HAIL
3/4”ANDLAGER HAIL
AD-15358-R1@
LEVEL2
YELLOW LEVEL3
RED LEVEL4
MAGENTA
Hail Size Probability
Figure 5-35
Spotting Hail
As previously stated, dry hail is apoor reflector,and therefore
generatesdeceptively weakor absentradar returns. Whenflying above
thefreezing level,hail canbe expectedin regionsabove andaround 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.
Sincethe core of such astorm is very turbulent, but largely icy,the red
core on the radar display is weak or absent and highly mobile. The
stormcore can be expected to change shapes with each antenna scan.