SNOWFLAKES An ice crystal or an aggregate of ice crystals which fall from clouds.
Snowflakes are simply aggregates of ice crystals that collect to each other as they fall toward the surface.
Snowflakes - Packets of falling snow formed when at least a few ice crystals are matted together. The largest snowflakes tend to occur when temperatures are near freezing. Snowflakes have a hexagonal or six-sided shape.
It usually appears clustered into snowflakes. It is reported as "SN" in an observation and on the METAR. SNOW ADVISORY A statement or advisory issued when snow is expected to create hazardous travel conditions.
SnowPrecipitation in the form of ice crystals, mainly of intricately branched, hexagonal form and often agglomerated into snowflakes, formed directly from the freezing [deposition] of the water vapor in the air.
Melting level The level at which ice crystals and snowflakes melt as they descend through the atmosphere. Melting point The temperature at which a solid substance undergoes fusion, i.e. melts, changes from solid to liquid form.
melting layerThe layer below the 0°C isotherm where snowflakes melt and turn into raindrops. When viewed by radar this layer appears as a band of enhanced reflectivity; thus it is commonly known as the "radar bright band.
Ice Pellets(abbrev. IP) Same as Sleet; defined as pellets of ice composed of frozen or mostly frozen raindrops or refrozen partially melted snowflakes. These pellets of ice usually bounce after hitting the ground or other hard surfaces.
Nimbostratus is composed of suspended water droplets, sometimes supercooled, and of falling raindrops and/or snow crystals or snowflakes. It occupies a layer of large horizontal and vertical extent.
Stratocumulus is composed of small water droplets, sometimes accompanied by larger droplets, soft hail, and (rarely) by snowflakes. When the cloud is not very thick, the diffraction phenomena corona and irisation appear.
(2): EVAPORATIVE COOLING of the air through which the snowflakes are falling. Even with the most intense precipitation, there is always lots of air around the falling raindrops or snowflakes and evaporation of the precipitation elements will occur.
Precipitation of ice crystals, most of which are branched (sometimes star shaped). In cold conditions, snowflakes may be tiny, individual crystals. At warmer temperatures, snowflakes may clump or freeze together to produce larger snowflakes.
Libbrecht, Kenneth: The Magic Of Snowflakes: A Postcard Book, 2005, Voyageur Press; ISBN: 089658724X (PB).
Libbrecht, Kenneth and Rasmussen, Patricia: The Snowflake: Winter's Secret Beauty, 2003, Voyageur Press; ISBN: 0896586308 (BP).
AGGREGATION
The process of snowflakes massing together in a cluster, maximizing when temperatures are within just a few degrees of freezing.
Sleet (PL) Describes solid grains of ice formed by the freezing of raindrops or the refreezing of largely melted snowflakes. These grains usually bounce upon impact with the ground or pavement.
Melting Level
Level at which ice crystals and snowflakes melt during their descent through the atmosphere.
Meteorologist
Person who is professionally employed in the study or practice of meteorology.
GRAUPEL A form of frozen precipitation consisting of snowflakes or ice crystals and supercooled water droplets frozen together. Related term: snow pellets ...
Crystalline form of ice. When they collide or coalesce with others form snowflakes, hail or graupel.
Indian Summer
A term used for a period of warm settled weather in mid to late autumn.
And this year, when winter's ice coats Texas' Alamo, drives boulevardiers from the Riviera's Cote d' Azur and blows snowflakes about Rome's St. Peter's Square, people are bound to take notice.
1) Hard grains of ice consisting of frozen raindrops, or largely melted and refrozen snowflakes.
SLEET - Solid grains of ice which form from the freezing of raindrops or the refreezing of melted snowflakes. These small, transparent ice pellets usually bounce when they hit a hard surface.
In the absence of nuclei, condensation will only occur at much lower temperatures. Under persistent condensation or deposition, cloud droplets or snowflakes form, which precipitate when they reach a critical mass.
Sleet: Pellets of ice that form when rain or melting snowflakes freeze while falling. (Occurs in cold weather; hail usually occurs in summer.)
Freezing Rain: Rain that turns to ice on impact with the surface.
Rain: Extended period of precipitation.
" When an ice crystal collides with a supercooled water droplet which is assimilated and freezes, this agglomeration process is called "accretion." Accretion may eventually lead to the formation of hail. Snowflakes are agglomerations of various ice ...
They always occur in showers and are often accompanied by snowflakes or rain drops, when the surface temperature is around zero degrees Celsius.Snow showerSnow falling at varying intensities for brief periods of time. Some accumulation is possible.
 See also: Snowflake, Air, Cloud, Water, Atmosphere
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