Garmin AERA 660 Pilot's Manual page 103

TEMPERATURES ALOFT
Temperature Aloft data shows the forecasted temperatures aloft in 3,000-foot
increments up to 39,000 feet MSL. For altitudes 18,000 feet and above the relative
ISA temperature is shown. Temperatures are color coded with temperatures near
and below freezing are shown as shades of blue, green for temperatures just above
freezing and shades of orange are used for warmer temperatures.
Temperatures Aloft Data
METARS AND TAFS
NOTE: METAR information is only displayed within the installed aviation
database service area.
METAR (METeorological Aerodrome Report) is an international code used for
reporting weather observations. METARs are updated hourly or as needed. METARs
typically contain information about the temperature, dewpoint, wind, precipitation,
cloud cover, cloud heights, visibility, and barometric pressure. They can also contain
information on precipitation amounts, lightning, and other critical data. If METAR data
is available for an airport, a color-coded flag is shown next to the airport.
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.
An abbreviated version can be viewed by selecting the METAR flag with the map
pointer. Touching the Map Feature Button will display additional information. METAR
and TAF data can be displayed as raw or decoded text.
190-02017-20 Rev. A
Temperatures Aloft Altitudes
Garmin aera 660 Pilot's Guide
Hazard Avoidance
87