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Aeronautical Information Manual (AIM), page 509

Index   508 -- Page 509 -- 510

5/26/16

(11) Beginning/Ending of Precipitation/
TSTMS.
(12) TSTM Location MVMT.
(13) Hailstone Size (GR).

(14) Virga.
(15) VRB CIG (height).

(16) Obscuration.
(17) VRB Sky Condition.

(18) Significant Cloud Types.
(19) Ceiling Height 2nd Location.

(20) PRESFR PRESRR.
(21) Sea-Level Pressure.

(22) ACFT Mishap (not transmitted).
(23) NOSPECI.

(24) SNINCR.
(25) Other SIG Info.

(c) Additive and Automated Maintenance
Data.
(1) Hourly Precipitation.

(2) 3- and 6-Hour Precipitation Amount.
(3) 24-Hour Precipitation.

(4) Snow Depth on Ground.
(5) Water Equivalent of Snow.

(6) Cloud Type.
(7) Duration of Sunshine.

(8) Hourly Temperature/Dew Point
(Tenths).

(9) 6-Hour Maximum Temperature.

(10) 6-Hour Minimum Temperature.

(11) 24-Hour Maximum/Minimum
Temperature.

(12) Pressure Tendency.

(13) Sensor Status.
PWINO
FZRANO
TSNO
RVRNO

PNO
VISNO
Examples of METAR reports and explanation:
METAR KBNA 281250Z 33018KT 290V360
1/2SM R31/2700FT SN BLSN FG VV008 00/M03
A2991 RMK RAE42SNB42

METAR . . . . . . aviation routine weather
report
KBNA . . . . . . . . Nashville, TN
281250Z . . . . . . date 28th, time 1250 UTC
(no modifier) . . This is a manually generated
report, due to the absence of
"AUTO" and "AO1 or AO2"
in remarks
33018KT . . . . . wind three three zero at one
eight
290V360 . . . . . . wind variable between
two nine zero and three six
zero
1/2SM . . . . . . . . visibility one half
R31/2700FT . . . Runway three one RVR two
thousand seven hundred
SN . . . . . . . . . . . moderate snow
BLSN FG . . . . . visibility obscured by
blowing snow and fog
VV008 . . . . . . . indefinite ceiling eight
hundred
00/M03 . . . . . . . temperature zero, dew point
minus three
A2991 . . . . . . . . altimeter two niner niner one
RMK . . . . . . . . remarks
RAE42 . . . . . . . rain ended at four two
SNB42 . . . . . . . snow began at four two
METAR KSFO 041453Z AUTO VRB02KT 3SM
BR CLR 15/12 A3012 RMK AO2

METAR . . . . . . aviation routine weather
report
KSFO . . . . . . . . San Francisco, CA

041453Z . . . . . . date 4th, time 1453 UTC
AUTO . . . . . . . fully automated; no human
intervention
VRB02KT . . . . wind variable at two

3SM . . . . . . . . . visibility three
BR . . . . . . . . . . visibility obscured by mist
CLR . . . . . . . . . no clouds below one two
thousand
15/12 . . . . . . . . . temperature one five, dew
point one two

Meteorology 7-1-65

Page 509 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   508 -- Page 509 -- 510