Classification of Synoptic Patterns With Mesoscale Mechanisms for Downslope Windstorms in Korea Using a Self‐Organizing Map

Downslope windstorms (DWs) are responsible for wildfires, wind gusts, and turbulence on the lee side of Taebaek Mountains in Yeongdong (YD) region Korea. We classified synoptic conditions YD using a self-organizing map (SOM). For windstorm events from 1979 to 2019, sea level pressure anomalies were used train SOM. It was found that patterns could be into three representative types: (1) south-high north-low pattern spring, (2) west-high east-low winter, (3) strong low-pressure system passing through northern part At 850 hPa, prevailing southwesterly northwesterly flows with warm cold advections dominant Types 1 2, respectively. And, Type 3 presented well-developed baroclinic cyclone. Adiabatic warming by downslope strongest 1, which likely have huge impact spread wildfires. Three mesoscale generation mechanisms examined under different patterns. The hydraulic-jump theory 2 due upstream moderate Froude numbers inversion layers. partial reflection mountain waves all types but more frequent than others. DWs wave breakings at critical levels mostly occurred 1. This objective classification weather may improve predictions future projections this event, particularly light ongoing climate changes.