AMC3 MET.TR.205(d) Reporting of meteorological
elements
PRESENT WEATHER PHENOMENA — UNIDENTIFIED
PRECIPITATION (UP)
In automated local routine report, local special report, METAR and SPECI, in addition to drizzle (DZ), rain (RA) and snow (SN), the abbreviation ‘UP’ should be used for unidentified precipitation when the type of precipitation cannot be identified by the automatic observing system.
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