Triple Point of Water: Hail Rain Explained

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SUMMARY

The discussion centers on the phenomenon of hail rain, which occurs when water and ice crystals fall simultaneously from the atmosphere, indicating the triple point of water. This state allows H2O to exist as gas, liquid, and solid concurrently, with gravitational forces causing the heavier forms, liquid and solid, to descend. The conversation also clarifies that for snow to form, the entire atmospheric column must remain below freezing, preventing melting during descent. Hail specifically forms when liquid water passes through sub-freezing temperatures, resulting in ice chunks rather than ice crystals.

PREREQUISITES
  • Understanding of the triple point of water
  • Knowledge of atmospheric conditions affecting precipitation
  • Familiarity with phase changes of water (solid, liquid, gas)
  • Basic principles of meteorology
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  • Research the triple point of water and its implications in meteorology
  • Study the formation processes of hail and snow
  • Explore atmospheric temperature profiles and their effects on precipitation types
  • Learn about the physics of phase transitions in water
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Meteorologists, atmospheric scientists, educators, and anyone interested in the science of precipitation and phase changes of water.

pivoxa15
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When we have hail rain, that is water and little solids in the form of ice crystals falling from the sky, is that evidence of the triple point of water being reached in the atomsphere hence H20 gas, liquid and solid coexist at the same time with the heavier two, liquid and solid falling down from the sky due to domination of gravititational foces.
 
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For snow to fall, each part of the atmosphere that it falls through must be below freezing, this way the crystals (snowflakes) don't melt at any point on their way down. I am pretty sure that hail is when liquid water falls through a section of atmpsphere that is below the freezing point where it becomes ice chunks rather than ice crystals. Your triple point explanation seems to make sense too.
 

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