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Look at this METAR:

KLOU 151553Z 21005KT 10SM CLR 13/M01 A3044 RMK AO2 SLP309 T01281011 $

What does the dollar sign mean?

kevin
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Pondlife
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1 Answers1

34

A maintenance indicator sign, $, is included when an ASOS/AWSS (Automated Surface Observing System / Automated Weather Sensor System) detects that maintenance is needed on the system.

Reference: http://www.faa.gov/documentLibrary/media/Order/JO%207900.5C.pdf

Or if you need an easy way to remember it, courtesy of the awesome Ralph J:

It means that they need to spend some money to fix whatever is broke on the automated reporting station!

End Anti-Semitic Hate
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slookabill
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    To improve the answer, it would be nice if you could resolve the ASOS and AWSS abbreviations, please. – hiergiltdiestfu Nov 15 '15 at 21:02
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    ASOS = Automated Surface Observing System; AWSS = Automated Weather Sensor System. These are nicely described at https://en.wikipedia.org/wiki/Automated_airport_weather_station – Adam Wilt Nov 16 '15 at 03:43
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    Another appropriate reference for this would be the "Aviation Weather Services" advisory circular. – Ryan Mortensen May 02 '16 at 23:58