All weather systems
“Weather roadblock - stationary high pressure fortress deflecting all storms”
Formation
Anticyclone becomes stationary, blocking normal weather pattern flow
Impact
Disrupts normal weather patterns, causes extended extreme conditions
Technical specs
Wind5-20 mph (light winds)
Pressure1025-1055 mb
TemperatureCan create extreme heat or cold depending on season
RegionsCan form anywhere but common over continents in summer
elite tier
Famous encounter
2003 European Heat Wave - Caused by a persistent Omega Block
Etymology
Named for its ability to 'block' the normal zonal flow of westerly winds