- 云量
- 雪需要潮湿的空气，而温暖的空气可以携带更多的湿度(所以在这种情况下，情况正好相反，即下雪是因为它更温暖)
- 别的什么?<李> / < / ol >
其次是降水引起的湿度突然下降，冷干燥空气感觉比冷潮湿空气温暖，因为它传递热量较慢。虽然这种影响往往只有在空气高于冰点时才会被注意到。< / p >
Add both of these together and sprinkle in some confirmation bias and you have the common belief that it always gets warmer, when it doesn't.
Now transforming water vapor (a gas) into a solid releases energy. The same thing happens when it rains. In both cases the effect is minor and would not be felt at ground level.
降雪可能发生在几种情况下。在这里，我假设中高纬度地区的典型条件。与冷暖锋有关可能是最常见的。山区的降雪可能与造山云和降水有关，当地形为降水创造条件时，空气会上升。此外，也有可能出现对流降水，尽管这种情况在夏季降雨(以及冰雹等恶劣天气)时更为常见。
因此，当与暖锋相关的降雪发生时，当暖锋经过时，暖空气取代冷空气，可以预期变暖。我猜这就是你所经历的。然而，由于在冷锋经过期间也有可能出现降雪，因此可能会出现相反的情况。地形条件关注的是一个更稳定的情况，空气受到静止的山脉的影响，所以我不认为气温会有很大的变化，除非穿过山脉的空气本身由于这样或那样的原因改变了温度。在我看来，对流降雪不太可能产生明显的温度变化，因为雪是由暖空气的垂直运动产生的，冷却后形成雪。 I would rather expect a slight cooling, similar to what happens under a heavy rain shower in summer.
So in short, the warming you mention is not generally associated with snow fall per se but likely associated with the passing of a warm front.
(2) it has been already mentioned in another comment, that precipitation happens due to any sort of uplift, hence cooling of air and condensation to form precipitation as snow or rain. Now, what you describe, warming as a consequence of snowfall, can in my perspective be attributed to the condition of a warm (humid) airmass overpassing a cold (dry) airmass. Due to its lower density, the warm air is, generally speaking, pushed up over the cold air. Due to this cooling effect we experience cloud formation and, with elevated water vapor concentrations of the overpassing air mass, precipitation (e.g. snowfall).
Now, the important phenomenon in this condition is the overpassing of the warm airmass. This induces a general heating of the underlying cold front while continuosly loosing latent heat trapped in its water vapor and passing it off as snowfall or rain, thus heating the underlying atmosphere. The important factor is the contiuned energy input of the overpassing low pressure air mass. This can, if the conditions are right, lead to continued snowfall, which eventually will turn into rain, if the base temperature is close enough to zero.
In opposition, a cold front "wedging" into a warm, low pressure airmass, condensing the water vapor as rain or snow and leaving a cloudless high pressure area in its wake, will become actually colder after the initial snowfall, which will be also of much shorter duration (some hours of snowfall)
I'm not too sure of the connection between precipitation from the uplifted warm air and heat transfer to the cold airmass, though it does seem logical to me. Any thoghts on that topic?