What is the meaning of forest fire risk rating in weather forecast?

The classification of forest fire weather grades is based on the industry standard lyt 1 172-95 National Forest Fire Weather Grades (issued by the Ministry of Forestry1June 22, 1995). The standard * * * considers five meteorological factors of fire risk, namely:

① Maximum daily temperature during forest fire prevention period.

② Minimum daily relative humidity in forest fire prevention period.

(3) the daily or early morning precipitation during the forest fire prevention period and the number of consecutive days without precipitation thereafter.

④ Maximum daily wind power level during forest fire prevention period.

⑤ The seasonal impact correction index of biological and abiotic phenology during forest fire prevention.

Comparing the numerical value obtained from ①+②+③+④-⑤ with the standard value of forest fire weather grade, the forest fire weather grade is obtained. There is no danger at one level; Second-level low risk; Grade III moderate risk; Level 4 is highly dangerous; Level five is extremely dangerous.