International warning signal recognition and annotation

Road ice warning signal

Road ice early warning signal is divided into three levels, respectively, yellow, orange, red.

Sandstorm Warning Signal

Dust storm warning signals are divided into three levels, which are represented by yellow, orange and red respectively.

Fog early warning signal

The fog warning signal is divided into three levels, which are respectively represented by yellow, orange and red.

Gale (except typhoon) warning signal

Gale (except for typhoon) warning signals are divided into four levels, which are respectively indicated by blue, yellow, orange and red.

Typhoon warning signal

Typhoon warning signals are divided into four levels, which are indicated by blue, yellow, orange and red.

Hail warning signal

The hail warning signal is divided into two levels, which are indicated by orange and red respectively.

霾Warning signal

霾 Early warning signals are divided into two levels, which are indicated by yellow and orange respectively.

Lightning warning signal

The lightning warning signal is divided into three levels, which are respectively represented by yellow, orange and red.

Blizzard warning signal

Blizzard warning signal is divided into four levels, respectively, in blue, yellow, orange, red.

Drought warning signal

The drought warning signal is divided into two levels, which are indicated by orange and red. The drought index classification is based on the integrated meteorological drought index in the national standard "Meteorological Drought Level" (GB/T20481-2006).

High temperature warning signal

The high-temperature early warning signal is divided into three levels, which are represented by yellow, orange and red respectively.