What is the western Pacific subtropical high index? What kind of weather forecast is commonly used to see the weather? For example, 500hpa\800hpa, height field, etc.
The subtropical high index of the western Pacific is divided into area index, intensity index, westward extension ridge index, high pressure ridge index, Hubei resistance index and so on. Generally speaking, weather forecast includes potential height fields of 200, 500, 700 and 850 hPa, wind fields of 500, 700 and 850 hPa, relative humidity fields and specific humidity fields of 700 and 850 hPa, etc.