Garmin G3X Pilot's Manual page 206

Hazard Avoidance
TAF (Terminal Area Forecast) is the standard format for 24-hour weather forecasts.
TAFs may contain some of the same code as METAR data. It typically forecasts
significant weather changes, temporary changes, probable changes, and expected
changes in weather conditions.
METAR and TAF text data is displayed on the Map Page and the Weather (WX) Page.
An abbreviated version can be viewed by panning over the METAR flag. Pressing the
ENT Key will display additional information. METAR and TAF data can be displayed as
raw or decoded text.
Changing METAR and TAF text:
1) Using the Map Pointer, select the desired METAR and press the ENT Key; or
from the Waypoint (WPT) Page press the WEATHER Softkey. The Weather
Information Page is displayed.
2) Press the MENU Key.
a) Select 'Show Decoded Text' or 'Show Raw Text'.
b) Press the ENT Key.
Or:
a) Select 'Change Text Size' and press the ENT Key.
b) Select 'Small', 'Medium', or 'Large' and press the ENT Key.
The METAR flag color is determined by the information in the METAR text.
VFR (ceiling greater than 3000 feet AGL and visibility greater than 5
miles)
Marginal VFR (ceiling 1000-3000 feet AGL and/or visibility 3-5 miles)
IFR (ceiling 500 to below 1000 feet AGL and/or visibility 1 mile to less
than 3 miles)
Low IFR (ceiling below 500 feet AGL or visibility less than 1 mile)
METAR text does not contain adequate information to determine
flight conditions
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Garmin G3X Pilot's Guide 190-01115-00 Rev. G