Definition
A standard intensity-level descriptor used in aviation reports and forecasts to indicate a moderate degree of a phenomenon, sitting between low (light) and high (heavy or strong). Commonly applied to turbulence intensity, icing intensity, precipitation, and similar graded conditions.
Plain English
A label meaning 'middle level' — not light, not heavy, somewhere in between.
Context Anchor
Seen in FAA abbreviation lists and short aviation notices where space is limited.
Derivation
From Latin medius, meaning 'middle.' The same root gives us 'median' and 'medium.' In aviation reporting, it simply marks the middle step on an intensity scale.
Why Pilots Care
Intensity descriptors drive decisions. 'MED' turbulence or icing is significant enough to affect handling, passenger comfort, and route choice — it should not be treated as minor.
Intuition Check
Do not read MED as a medical abbreviation here. In this FAA abbreviation context, MED means medium, or middle-level.
Example Sentence 1
The PIREP reported MED turbulence at 8,000 feet over the ridge line.
Example Sentence 2
Edge lights were operating at MED intensity during the night arrival.