5-40 Developed for Training Purposes Leerjet 35/36
February 1998
CAE SimuFlite
Sample METAR
A routine aviation weather report on observed weather, or
METAR, is issued at hourly or half-hourly intervals. A special
weather report on observed weather, or SPECI, is issued when
certain criteria are met. Both METAR and SPECI use the same
codes.
A forecast highly likely to occur, or TREND, covers a period of
two hours from the time of the observation. A TREND forecast
indicates significant changes in respect to one or more of the
following elements: surface wind, visibility, weather, or clouds.
TREND forecasts use many of the same codes as TAFs.
Most foreign countries may append a TREND to a METAR or
SPECI. In the U.S., however, a TREND is not included in a
METAR or SPECI.
The following example indicates how to read a METAR .
KHPN 201955Z 22015G25KT 2SM
R22L/1000FT TSRA OVC010CB 18/16 A2990
RERAB25 BECMG 2200 24035G55
KHPN. ICAO location indicator.
201955Z. Date and time of issuance. METARs are issued
hourly.
22015G25KT. Surface wind (same as TAF). If the first three
digits are VAR, the wind is variable with wind speed following. If
direction varies 60° or more during the ten minutes immediately
preceding the observation, the two extreme directions are indi-
cated with the letter V inserted between them (e.g., 280V350).
.
NOTE: G must vary 10 kts or greater to report gust.
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