Definition
Tiny pieces of frozen water suspended in the atmosphere, often present in high-altitude clouds and cold-air conditions. They scatter and reflect light, which can degrade visibility and produce optical effects such as halos, glare, and reduced contrast — particularly noticeable at night when aircraft and ground lights interact with them.
Plain English
Small bits of ice floating in the air. They bounce light around, which can make it harder to see clearly, especially at night.
Context Anchor
Seen in night flying discussions, especially when visibility, runway lights, landing lights, or other aircraft lights are affected by cold weather or cloud conditions.
Why Pilots Care
Ice particles can create halos around lights or reduce contrast, directly affecting a pilot’s ability to judge distance and altitude at night.
Analogy
Like driving through light snow at night with your high beams on — the beams light up the falling flakes instead of the road ahead, making it harder to see.
Grounding Statement
Picture shining a flashlight through fine snow: the light bounces off many tiny frozen bits instead of traveling cleanly through clear air.
Intuition Check
Do not assume ice particles always mean large hail or visible snowflakes. In aviation, the term can also mean very small frozen crystals in the air that still affect what a pilot sees.
Example Sentence 1
On the night descent, ice particles in the cloud layer scattered the landing light beam and the pilot switched it off to reduce glare.
Example Sentence 2
During the night flight briefing, the instructor pointed out that ice particles in cirrus clouds could distort runway lighting.