Why does the temperature of the air become much higher than freezing with the snowfall at the same time?

Snow is never too cold. So when does the snow get too warm? "When the air temperature is above freezing." However, anyone who lives in a climate that experiences cold winters knows that snow may form when the air temperature drops sharply above freezing. In fact, in some regions, snowfall often begins with a surface air temperature close to 2 °C (36 °F). Why doesn't the snowfall melt in this weather? In fact, it melts somewhat. In order for snowflakes to survive in air above freezing, the air must be unsaturated (relative humidity is less than 100 percent) and the air must be at or below freezing in humid conditions. It is a measure of the amount of cooling that can occur in the atmosphere as water evaporates into the air. When it rains, a layer of dry air with a low moist temperature, rapid evaporation and cooling occurs, which is why the air temperature often drops when it starts to rain during the winter, because As precipitation evaporates in this dry air, rapid cooling may change a rainy day to a snowy one. This is the type of cooling that allows snowflakes to survive above freezing (melting) temperatures. Suppose it is winter and the sky is raining. At the surface, the air temperature is 2 °C (36 °F), the dew point is 26 °C (21 °F), and the wet temperature is 0 °C (32 °F). The air temperature goes from the height of the surface to the cloud deck with great intensity. Soon, flecks of snow began to fall from the clouds to the unsaturated layer below at high freezing temperatures, the snowflakes began to partially melt. The air, however, is dry, so the water evaporates quickly, cooling the air. In addition, the evaporation of the falling snowflake to the wet temperature, which falls back the melting rate of the flake. Dew increases, while the moist temperature remains basically unchanged. Finally, the entire layer of air cools down to the moist temperature and becomes saturated at 0°C. As long as the wind does not warm the air, the rain remains as snow. We see that when snow falls the air is warmer (say at 8 degrees Celsius or 46 degrees Fahrenheit), the air must be at a humid temperature, it is very dry at freezing or below. In fact, with an air temperature of 8 °C (46 °F) and a wet temperature of 0 °C (32 °F), a dew point of 223 °C (29 °F) and a relative humidity of 11%, conditions like this are highly unlikely. At the surface before the onset of precipitation, in fact, the highest air temperature possible with a frozen moist subsurface is about 10 °C (50 °F). Hence, snowflakes melt quickly in the air with a temperature higher than this value. However, it is still possible to see patches of snow at different temperatures over 10 degrees Celsius (50 degrees Fahrenheit), especially if the freezing snowflakes move quickly towards the relatively dry ground from lightning.

* The moist temperature is always higher than the dew point, except when the air is saturated. At that point, the air temperature, wet temperature, and dew point are all the same.