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Freezing is a phase transition in which a liquid turns into a solid when its temperature is lowered below its freezing point. [ 1 ] [ 2 ] For most substances, the melting and freezing points are the same temperature; however, certain substances possess differing solid-liquid transition temperatures.
Freezing [1] or frost occurs when the air temperature falls below the freezing point of water (0 °C, 32 °F, 273 K).This is usually measured at the height of 1.2 metres above the ground surface.
Freezing rain develops when falling snow encounters a layer of warm air aloft, typically around the 800 mbar (800 hPa; 80 kPa) level, causing the snow to melt and become rain. As the rain continues to fall, it passes through a layer of subfreezing air just above the surface and cools to a temperature below freezing (0 °C or 32 °F or 273 K).
Freezing rain sometimes marks the southern edge of wintry precipitation in weather systems. That southern edge can dip into areas not used to dealing with wintry weather, such as the South.
Freezing point (°C) K f (°C⋅kg/mol) Data source; Aniline: 184.3 3.69 –5.96 –5.87 K b & K f [1] Lauric acid: 298.9 44 –3.9 Acetic acid: 1.04 117.9 3.14 16.6 ...
Here's how to stay safe during ice, freezing temperatures and more. Natalie Rahhal. January 21, 2025 at 8:40 AM. ... Winter weather can be dangerous — even in the warmer South.
Freezing temperatures from a harsh arctic blast are expected to affect nearly 300 million Americans across most of the continental U.S. in the coming days, according to the National Weather Service.
The freezing level, or 0 °C (zero-degree) isotherm, represents the altitude in which the temperature is at 0 °C (the freezing point of water) in a free atmosphere (i.e. allowing reflection of the sun by snow, icing conditions, etc.).