Here is the fifth clue:

    Clouds in the winter sky have water vapor that's freezing and being stored.  Little crystals are starting to form and are getting heavy and ready to fall.  Each shape falling is very different but there are always six sides to every one.

What weather condition is the weather machine going to make?

                        A. Snowy
                        B. Rainy
                        C. Cloudy

Hurry, Dr, Zorber needs to get prepared for this one!