The temperature is low and the sky is bright.

Yesterday, Hangzhou was affected by weak cold air, and the cloud system and north wind were strong, which made the temperature suppressed. Although the lowest temperature in the morning is 1.6℃, which is slightly higher than the day before, I can't stand the gloomy weather, and the highest temperature is only 7. 1℃, which makes me feel much colder than the day before yesterday. On the other hand, due to the influence of imported pollutants, there was smog in Hangzhou yesterday. However, don't worry too much, the air quality level will improve today.

It's just that the cold and dampness in the south came back. This afternoon, the warm and humid air flow is strengthened, and the rain is coming again; The temperature is very low this morning. The lowest temperature is 0 ~-2℃ in plain, with thin ice, -2 ~-4℃ in mountainous area and -4 ~-8℃ in mountainous area, which is severely frozen. On June1June-June 17, there will be an obvious rainfall process when the cold and warm air streams meet; 18- 19 The weather is getting better.

Why is the sky always gray recently?

Affected by imported pollutants, the air quality in Hangjiahu area reached moderate pollution level yesterday morning. However, in the afternoon, with the southward diffusion of pollutants, the concentration of pollutants in the northern region decreased slightly, and some areas in Hangzhou had mild to moderate haze.

Some friends can't help asking, the sky is always gray recently, is the air quality always bad? No, just because there is no blue sky and the sky is gloomy doesn't mean the air is bad. Rainy days and foggy days will reduce visibility, but their air quality may be two different things.

On rainy days, due to the large amount of clouds in the sky, little or no solar energy penetrates through the clouds, and the sky is dark. The sky is white and gray due to the reflection and scattering of light, which will give people a gray feeling. If it rains a little, the visibility will be obviously reduced, and it is easier for people to think that the air quality is not good.

What you see may not be true, but you still have to speak with data. Although the air quality declined yesterday, the air quality level of Hangzhou in these seven days was generally at a good level. Today's air quality is expected to be good, but it will be cloudy to cloudy in the morning, with occasional light rain on cloudy days in the afternoon to night. It's also a bit difficult to see the blue sky.