China weather standard

1, Xiaoyu

2. moderate rain

3. Heavy rain

4. Heavy rain

Extended data

1, Xiaoyu

Refers to a large number of tiny water droplets or ice crystals floating in the air near the ground, and the horizontal visibility drops below 1 km, which affects transportation. The rainfall intensity is small, the rainfall within 24 hours is less than 10mm, clothes can be wet, and the land surface is completely wet, but there is no water accumulation.

2. moderate rain

Precipitation within 24 hours 10~24.9 mm; 12 hour precipitation 5~ 15 mm; /kloc-rain with precipitation of 2.6~8 mm within 0/hour. Moderate rain is a rainfall process in which the precipitation reaches 5 ~10 ~ 25mm within 12 hours or10 ~ 25mm within 24 hours.

3. Heavy rain

Heavy rain generally refers to the rain with a daily (24-hour) precipitation of 25-49.9 mm or the rain with a daily precipitation of 8. 1- 16.0 mm 1 hour. Rainstorm refers to the rainfall process in which the precipitation is 12 hour or 25-49.9 mm within 24 hours.

4. Heavy rain

According to China's meteorological regulations, heavy rainfall with a precipitation of more than 50 mm in 24 hours is called "rainstorm". The precipitation and terrain characteristics are different in different places, and the storm and flood standards are also different in different places. It often leads to floods, serious soil erosion and flooded crops. When the rainstorm comes, there are the following preventive measures:

1. When the outdoor accumulated water overflows into the room, cut off the power immediately to prevent the accumulated water from being charged and hurting people.

2, immediately stop the field farming activities and outdoor activities.

3. When walking in outdoor stagnant water, pay attention to observation and walk near buildings to prevent falling into inspection wells and pits.

4. Pay attention to the rainstorm at night to prevent the old house from collapsing and hurting people.

Don't ride a bike when it rains heavily. Pay attention to observation when walking in stagnant water. Prevent falling into manholes or pits or holes.

6. When the driver encounters too deep water on the road or under the overpass, he should try to bypass it to avoid forced passage.

7. Turn off the fire in a low-lying place on rainy days. Never wait in the car. Get off at a high place and wait for rescue.

References:

Baidu encyclopedia-Xiaoyu

Baidu encyclopedia-moderate rain

Baidu encyclopedia-Dayu

Baidu encyclopedia-rainstorm