METAR Codes - General MET
There are a whole host of METARMETAR —Meteorological Actual Report codes and you will become familiar with them throughout your career, but the main ones to know are below. Where the code is prefaced by a +, that means "heavy"; where prefaced by a -, that means "light". No plus or minus implies that it is "moderate."
There are various obvious gotchas here - MI means shallow, not mist, for example.
|CAVOKCAVOK —Ceiling and Visibility OK||Ceiling and Visibility OK|
|RARA —Resolution Advisory||Moderate Rain|
|VC||In the vicinity|
|NOSIGNOSIG —METAR/TAFTAF —Terminal Aerodrome Forecast code for No Significant Change||No significant changes|