background image

(b)

National communications networks.

(c)

Computer-generated voice (available through FAA radio broadcast to
pilots, and dial-in telephone

line).

NOTE

-

Wind direction is reported relative to magnetic north in ATIS as well
as ASOS and AWOS radio (voice) broadcasts.

An ASOS/AWOS report without human intervention will contain only that
weather data capable of being

reported automatically. The modifier for this METAR report is "AUTO."
When an observer augments or

backs

-

up an ASOS/AWOS site, the "AUTO" modifier disappears.

There are two types of automated stations, AO1 for automated weather
reporting stations without a

precipitation discriminator, and AO2 for automated stations with a
precipitation discriminator. As appropriate,

"AO1" and "AO2" must appear in remarks. (A precipitation discriminator
can determine the difference between

liquid and frozen/freezing precipitation).

NOTE

-

To decode an ASOS/AWOS report, r[1]efer to FIG 7

[2]-

[3]1

[4]-

[5]8 and FIG 7

[6]-

[7]1

[8]-

[9]9.

REFERENCE

-

A complete explanation of MET[10]AR terminology is located in AIM, Para

[11]-

[12]1

[13]-

[14]28, Key to Aerodrome Forecast (TAF) and
Aviation Routine Weather Report

(METAR).

-

-

Meteorology

References

1. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
2. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
3. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
4. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
5. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
6. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
7. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
8. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
9. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
  10. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
  11. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
  12. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
  13. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0
  14. file:///media/stevei/plnkx/aspirations/go-faraim/work/src/faraim/faa/aim/554/aim-554.html#0