Garmin G1000 Mooney M20TN - Manual (Page 251)

190-00647-00 Rev. A Garmin G1000 Pilot’s Guide for the Mooney M20M/M20R/M20TN 6-15
HAZARD AVOIDANCE
To view the text of the SIGMET or AIRMET (Figure 6-17), press the Joystick and move it over the
icon. Press the ENT key.
Figure 6-17 Sample SIGMET Text
METARS AND TAFS
NOTE: The atmospheric pressure on the METAR is reported in hectopascals everywhere but in the US,
where it is reported in inches of mercury. Temperatures are reported in Celsius. Standard temperature and
atmospheric pressure are 15°C (59°F) and 29.92 in Hg (1013.2 hPa).
NOTE: METAR and City Forecast information is only displayed within the installed Aviation Database service
area.
METAR (METeorological Aerodrome Report) is the standard format for pre-flight weather briefings.
METARs are updated hourly and are considered current. A typical METAR report (Figure 6-18) contains
information about the temperature, dew point, wind, precipitation, cloud cover, cloud heights, visibility, and
barometric pressure. It can also contain information on precipitation amounts, lightning, and other critical
data. METARs are shown as colored flags at airports that provide them.
By contrast, the TAF (Terminal Aerodrome Report) is the standard format for 24-hour weather forecasts.
The TAF (Figure 6-18) may contain some METAR data, but it generally covers a smaller area. It typically
forecasts significant weather changes, temporary changes, probable changes, and expected changes in weather
conditions. METAR and TAF text are displayed on the Weather Data Link Page and the Weather Information
Page.