How many levels of color warning in weather forecast? What's the point?

First, the geological disaster prediction level is divided into 5 levels:

Grade 1 is very unlikely;

Level 2 is less likely;

Level 3 is more likely;

Level 4 is very likely;

Level 5 is very likely;

Two. Rainfall data table causing geological disasters

Level 3, that is, the level of concern in the forecast (rainstorm: 38.0-74.9 mm);

Level 4, which is an early warning level in the forecast (rainstorm: 50.0-99.9mm, easy to cause geological disasters);

Level 5, the warning level in the forecast (rainstorm: 100-250 mm);

1-2 level, notify the land and resources department;

3-5, the county land and resources bureau in conjunction with the county meteorological bureau put forward short-term forecast and imminent disaster forecast, reported step by step.

The county government also released it to the public, and notified it in place step by step according to the county, township, village, hidden danger point and monitoring person in charge.

Three. Classification standard of rainfall: (based on 24 hours)

1, rainstorm: 25.0-49.9mm

2. Heavy rain: 38.0-74.9mm.

3. Rainstorm: 50.0-99.9mm.

4. Rainstorm: 100-250 mm

5. Extraordinary rainstorm: > 250 mm

Description:

Disastrous weather warning signals are divided into typhoon, rainstorm, high temperature, cold wave, fog, thunderstorm and gale, gale, sandstorm, hail,

There are eleven types of snowstorms and road icing. Early warning signals are generally divided into four levels. According to the severity and urgency of disasters, the colors are as follows.

Blue, yellow, orange and red, marked in Chinese and English, represent average, heavy, serious and particularly serious respectively, with

General disaster prevention guide.

According to the Meteorological Law of People's Republic of China (PRC), the meteorological offices and stations subordinate to the competent meteorological departments at or above the county level shall issue this book in a unified way.

Forecast the early warning signal of the service responsibility area. No organization or individual may disseminate information provided by meteorological stations other than the competent meteorological departments to the public.

Forecast and early warning information.

There are no black ones, only four colors: blue, yellow, orange and red.