IRFP-01
Metro Review
(5) Temperature/Dew Point—listed in degrees Celsius
NOTE: When temperatures are below 0 degrees C, they
are preceded by “M” for minus (e.g., 10/M06 for
temperature 10 degrees C, dew point -6 degrees C).
(6) Altimeter Setting— (ex. A2992) “A” indicates setting in
inches of mercury for United States. Consists of 4 digits:
inches and hundredths
(7) Remarks (RMK) come last
(a) RMK SLP013 T01760158—Selected stations will
contain SLP for sea level pressure reported as the last
3 digits in hectoPascals (millibars) to the nearest tenth
(e.g., 1001.3 is reported as SLP013)
(b) RMK SLP013 T01760158—9-character code breaks
down the temperature and dew point to the nearest 1/
10th of a degree Celsius (selected stations)
(i) The “T” stands for temperature
(ii) The “0” means positive temperature
(iii) A “1” in place of the "0" stands for negative
temperature
(iv) Other temperature codes, such as 10142, 20012,
or 401120084, may appear to document
temperatures not related to aviation (selected
stations)
B. METAR on ASOS/AWOS 1.1.1.5.4
1. ASOS/AWOS reports will also use METAR/SPECI code formats.
An ASOS/AWOS report can be identified by the term A01 or A02 in
the remarks (RMK) section. Example:
METAR KOFP 251955Z AUTO 30008KT 10SM CLR 22/10 A3010
RMK AO2 SLP138 T02180096
2. Some ASOS/AWOS sites are attended
a. The term AUTO is not included in the report (A01 or A02
remain)
b.
An attended site may contain information that has been
manually provided by the observer
(8-97) Original
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