Snow melts into water.

雪化成水。

《新英汉大辞典》

The oxygen isotope ratio of the ocean changes as a great deal of water is withdrawn from it by evaporation and is precipitated as snow to form glacial ice.

随着大量的水通过蒸发被抽离，并以雪的形式沉淀形成冰川冰，海洋中氧同位素的比率就发生了变化。

youdao

From what I remember, water changes back and forth from water in lakes and oceans to vapor, and then back to water again when it falls as rain or snow, as precipitation.

根据我的记忆，水往复地变化，从湖泊和海洋里的水变成水蒸气，然后当它以雨或雪——也就是降水的形式落下时又变成水。

youdao

About fifteen centimeters of wet snow has as much water as two and one-half centimeters of rain.

VOA: special.2010.01.05

In the western United States, mountain snow provides up to seventy-five percent of all surface water supplies.

VOA: special.2010.01.05

About seventy-six centimeters of dry snow equals the water in two and one-half centimeters of rain.

VOA: special.2011.01.11

The three-month Catlin Arctic Survey expedition will also take samples of the water, snow, ice and air.

BBC: Polar survey team start journey

On January 20th the IPCC released a statement reiterating its overall conclusion on water from seasonal snow packs and glaciers in a warming world: that it is likely to be scarcer and available at different times.

ECONOMIST: Glaciers and the IPCC

In the 1990s, Greenland took in as much snow and water as it let out, Zwally said.

CNN: Ice melting across globe at accelerating rate, NASA says