Jimmie Lee Henderson, age 10 of Greensburg for his question:

Is it ever too cold to snow?

Snow is formed from water vapor in the air. When there is a lot of vapor, the snowflakes tend to be big and fluffy. Where there is less vapor, snow may form as tiny granules or even a s fins crystals and needles. It so happens that there is likely to be more vapor in warm air than in cold air. As air cools, its vapor is turned into misty cloud droplets or fine ice crystals, The colder the!air becomes, the more vapor it loses. So, air that is very, very cold does not have much vapor left with which to make snowflakes.

It is true that snow is less likely when the weather is very, very cold. But it is not impossible. There may be only a little, but there is always some vapor in the air and, when conditions are right, this vapor may turn into snow. Snow has been recorded in Alaska when the temperature was down to minus 52 degrees Fahrenheit.