Melting snow occurs when temperatures rise above the freezing point of water, causing solid snow to transform into liquid water. This process is influenced by factors such as sunlight, air temperature, and wind. As the snow melts, it can create puddles and contribute to the water supply in rivers and lakes. The melting of snow is an important part of the water cycle, as it replenishes groundwater and supports ecosystems. In regions with heavy snowfall, such as the Sierra Nevada mountains, melting snow is crucial for agriculture and drinking water during warmer months.