Thundersnow is a thunderstorm that storms snow instead of rain. This happens because the Earth's troposphere has dryer, colder air. The dry air forms a storm, but the cold air freezes the rain into snow. Rime is frozen fog, forming ice on an object. This happens when fog freezes onto the side of an object that is hit by wind.
Firn is snow that lasts throughout the summer season. When it snows, the snow gets compacted and air leaves. This compacts snow so greatly that it forms a block of ice.
Watermelon snow is snow that has a red or pink color. This happens because snow has a pigment in it called carotenoid pigment. This pigment dies the algae in snow to protect it
from U.V. radiation and the cold.
Jeff Haby
January 4, 2010
Susan Mayhew 2004
S.E. Smith 2003-2010
The cloud then spreads horizontally. The air filled with precipitation is heavier than the surrounding air, so the cloud sinks. Another type of cloud is a Lenticular cloud. Lenticular clouds are clouds that form right angles at high altitudes. When moist air collects around places with high altitude, the side with less wind creates waves of air, making the cloud. Roll clouds form when a downdraft rushes cold air, lifting warm air at a high velocity. Another type of 
cloud is a Noctilucent cloud. Noctilucent clouds form from water vapor and dust. They form mainly from the contents given off during volcanic activity.
Thundersnow is a thunderstorm that storms snow instead of rain. This happens because the Earth's troposphere has dryer, colder air. The dry air forms a storm, but the cold air freezes the rain into snow. Rime is frozen fog, forming ice on an object. This happens when fog freezes onto the side of an object that is hit by wind. 
Firn is snow that lasts throughout the summer season. When it snows, the snow gets compacted and air leaves. This compacts snow so greatly that it forms a block of ice. 
Watermelon snow is snow that has a red or pink color. This happens because snow has a pigment in it called carotenoid pigment. This pigment dies the algae in snow to protect it
from U.V. radiation and the cold. 
