User Guide

190-00494-00 Rev. B
Garmin G1000 Pilot’s Guide for Cessna Citation Mustang
6-37
HAZARD AVOIDANCE
Along squall lines (multiple cells or clusters of cells in a line (Figure 6-40), 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”, “fingers”, or
“scalloped” edges (Figure 6-40). 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 were red or
magenta areas.
Steep Gradient
Squall Line
Hook or Finger Scalloped Edge
Figure 6-40 Cell Irregularities
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
(Figure 6-41).
Figure 6-41 The ‘Blind Alley - Illustration