Is it cold when it snows?

If the ground temperature is lower than 0℃, snow or ice will appear on the road surface. Road icing is easy to occur from June 1 1 to April of the following year (that is, winter and early spring). Road icing often occurs in northern China, especially in the northeast and northern Inner Mongolia.

In the south of China, snowfall is generally "wet snow", which is often mixed with water at 0 ~ 4℃ and falls to the ground to become ice-water paste. When the temperature drops at night, it will solidify into large ice cubes, as long as the local minimum temperature in winter is lower than 0℃.

There may be roads that freeze, and as long as the temperature does not rise enough to melt the ice, it will remain as solid as a rock. Generally speaking, in the cold winter, when the temperature drops due to a wide range of strong cold air activities (called cold wave in meteorology), if it is accompanied by rain and snow, it is most prone to road icing.

Extended data:

Road icing warning signal: divided into three levels, which are indicated by yellow, orange and red respectively.

1, yellow warning signal of road icing

(1) Meaning: 12 hours, there may be road icing affecting traffic.

(2) Defense Guide: Traffic, public security and other departments should be prepared; Drivers should pay attention to road conditions and exercise safely.

2. Orange warning signal of road icing

(1) Meaning: There may be road icing that has a great impact on traffic within 6 hours.

(2) Defense guide: pedestrians should pay attention to anti-skid when going out; Public security departments should pay attention to directing and guiding vehicles; Drivers should take anti-skid measures, obey orders and drive slowly; Other yellow warning signals for icing on the same road.

3. Road freeze in red warning signal.

(1) Meaning: Road icing that has a great impact on traffic may occur or has occurred within 2 hours.

(2) Defense Guide: Relevant emergency departments should be ready to start the emergency plan at any time; Close icy road traffic when necessary; Industrial salt can be sprinkled on icy roads to increase the melting speed of ice; Other orange warning signals for icing on the same road.