Garmin G3X Touch Pilot's Manual page 224

Hazard Avoidance
S P
URFACE RESSURE
This feature displays pressure isobars and pressure centers. The isobars connect
points of equal pressure. Pressure readings can help determine weather and wind
conditions. High pressure areas are generally associated with fair weather. Low
pressure areas are generally associated with clouds and the chance of precipitation.
Isobars that are packed closely together show a strong pressure gradient. Strong
gradients are associated with areas of stronger winds. Pressure units can be displayed
in Millibars (mb) or Inches of Mercury (in).
L
IGHTNING
Lightning data shows the approximate location of cloud-to-ground lightning strikes.
A strike icon represents a strike that has occurred within a two-kilometer region and
within the last seven minutes. The exact location of the lightning strike is not displayed.
202
Garmin G3X Touch
Surface Pressure Data
Lightning Data
™ Pilot's Guide for Certified Aircraft
190-02472-00 Rev. D