Above -37, Snow needs particulates to form. https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ice-nuclei https://www.sciencedirect.com/topics/e

Above -37, Snow needs particulates to form. https://www.sciencedirect.com/topics/earth-and-planetary-sciences/ice-nuclei https://www.sciencedirect.com/topics/earth-and-planetary-sci... >The most important type of ice nuclei is mineral dusts blown into the atmosphere from deserts, arid lands, and agricultural fields. The International Mineralogical Association (IMA) defines minerals as naturally occurring solid substances formed in geological processes. IIRC snow makers use particulates too.