Plain English Meaning
The 'extra notes' section at the end of an aviation weather report. Anything important that doesn't fit in the standard format gets added here.
Full Definition
A coded section at the end of a METAR or SPECI weather report that contains additional information not covered by the main body of the report, such as significant weather observations, automated station type, sea-level pressure, hourly precipitation, and other supplementary details.
Context Anchor
Seen in METAR weather reports, usually near the end of the report after the main weather information.
Derivation
RMK is a shortened form of “remarks.” Weather reports use many shortened forms so important information can be transmitted in a compact, standard way.
Why Pilots Care
Remarks often include operationally important details such as recent weather changes or automated station type that affect flight decisions.
Intuition Check
RMK is not a weather condition itself. It is a marker that says, “extra notes start here.”
Example Sentence 1
The METAR ended with RMK AO2 SLP125, telling the pilot the report came from an automated station with a precipitation sensor and giving the sea-level pressure.
Example Sentence 2
Pilots reviewed the RMK section to confirm the presence of a recent wind shift.