Forest fire weather forecast is mainly based on meteorological factors to predict the fire weather grade, and whether the weather conditions can cause it.

Forest fire weather forecast is mainly based on meteorological factors to forecast fire weather grades, which are divided into five grades according to whether the weather conditions can cause fire, namely, Grade I, Grade II, Grade III, Grade IV and Grade V, as follows:

Grade I: green warning signal of forest fire, indicating that the forest fire grade is low in danger within the validity period, and combustible materials in the forest are not easy to burn and spread.

class ii: blue warning signal of forest fire danger, which indicates that the forest fire danger level is moderate during the validity period, and the combustible materials in the forest can be ignited and spread, with moderate danger.

level 3: yellow warning signal of forest fire danger, indicating that the forest fire danger level is relatively high during the validity period, and the combustible materials in the forest are easy to ignite, spread and have relatively high danger.

level 4: orange warning signal of forest fire, indicating that the forest fire is highly dangerous during the validity period, and combustible materials in the forest are easy to ignite, and it is easy to form a strong fire and spread rapidly, which is highly dangerous.

level 5: red warning signal of forest fire, which means that the forest fire is extremely dangerous within the validity period, and the combustible materials in the forest are easily ignited and spread rapidly, making it extremely difficult to put out the fire.

types of forest fire forecast

1. Fire weather forecast

Fire weather grades are mainly predicted according to meteorological factors that can reflect the degree of weather dryness and wetness. Meteorological factors usually include temperature, relative humidity, precipitation, wind speed and continuous drought weather. It does not consider the fire source, but only predicts whether the weather conditions can cause forest fires.

2. Forecasts of forest fires

According to the three conditions of forest fires, meteorological factors (air temperature, relative humidity, precipitation, wind speed, continuous drought weather, etc.), combustible conditions (dry and wet degree, load, flammability, etc.) and fire source conditions (fire source type and space-time pattern, etc.) are comprehensively considered to predict the possibility of forest fires.

3. Forest fire behavior prediction

On the basis of fully considering the weather conditions and combustible conditions, we should also consider the influence of topography (slope direction, slope position, slope, altitude, etc.) to predict some fire behavior indicators such as fire spread speed and fire intensity after forest fires occur.