The meaning of rain and fog

Sometimes it means sunny. Rain and fog are also equivalent to harmful gases. Fog droplets stick all kinds of harmful substances in the air together and are inhaled into the lungs, which directly affects health. It is recommended to wear a mask with weak resistance, otherwise it is easy to get sick and even die of poisoning. We call rain fog rain fog.

Rain and fog often appear in continuous light rain or rainy weather in Mao Mao. The life cycle of rain and fog is basically synchronized with the weak precipitation weather, and the duration varies from ten minutes to ten hours. Generally, the visibility and RVR will not fall below the standard, and the visibility is mostly 600- 1500m. Perhaps only high-standard mountain airports such as Wanzhou and Chengde will fall below the standard.

More attention should be paid to the low cloud weather, generally at 60- 120 meters. There may be a few clouds as low as 30 meters, but they don't last long. The situation that has the greatest impact on aviation operation also occurs in airports located in mountainous areas. Weak precipitation: 500hpa and 700hpa are mostly controlled by southwest warm and humid airflow in front of the trough, 850hpa is mostly weak trimming, and the ground is invaded by weak cold air.

In high humidity environment, the general humidity layer is deep, and the higher the humidity, the lower the visibility. The breeze should be neither too big nor too small. Inversion: There can be many inversions or no inversions. In the process of rain and fog, the pressure field may decrease slightly (the development of warm and humid airflow in the middle and upper layers); After the rain and fog, the air pressure rose slightly (caused by the infiltration of cold air).

Matters needing attention in rainy and foggy weather

1, start the wiper to keep the windshield clean, and start the windshield washer if necessary.

2. Open the window when driving. Even if you can't see other vehicles, you can hear horns, engines or other sounds to help you understand the road conditions and use your ears for safety.

Don't lean over the steering wheel and look forward, but keep a normal driving posture.