monsoon trough monsoon trough portion depicted line weather map showing locations minimum sea level pressure convergence zone wind patterns southern northern westerly monsoon winds lie portion easterly trade winds exist trough right axis heavy rains found usher peak location respective rainy season passes location hot dry conditions develop monsoon trough plays role creating world term monsoon trough commonly regions asia australia migration monsoon trough beginning annual rainy season summer months depressions tropical cyclones form vicinity monsoon trough capable producing year worth rainfall relatively short time frame movement strength monsoon western pacific reaches latitude late summer surface ridge opposite hemisphere strongest reach far 40th parallel august 20th parallel australia february progression accelerated onset summer monsoon characterized development lower air pressure continents monsoon trough associated australian monsoon reaches southerly latitude february oriented west northwest east southeast axis effect wind increases relative spin monsoon trough normally product increased wind convergence convergence zone monsoon trough wind lead increase convergence strengthening movement subtropical ridge cause strengthening monsoon trough wind surge moves location monsoon trough fronts tropics hemisphere winter normally shear lines temperature gradient minimal wind cross equator oceanic regions enhance monsoon trough hemisphere summer key way detecting wind surge reached monsoon trough formation burst thunderstorms monsoon trough embedded depressions circulation forms monsoon trough able compete neighboring thermal low continent wind surge occur periphery circulation broad nature monsoon trough known monsoon depression monsoon depressions generally tend strongest winds eastern periphery light variable winds cover large area near center bands showers thunderstorms develop area circulation presence upper level jet stream west system enhance development leading increased air aloft monsoon depression leads corresponding drop surface pressure systems develop land outer portions monsoon depressions similar tropical cyclones india example monsoon depressions country yearly numbers increase july august events monsoon depressions efficient rainfall producers cause year worth rainfall drier areas australia roles rainy season monsoon trough area convergence wind pattern elongated area low pressure surface trough focuses low level moisture defined elongated bands thunderstorms viewing satellite imagery abrupt movement north june beginning monsoon regime rainy seasons south convergence zone linked prolonged heavy rain events river northern china presence linked peak rainy season locations australia progresses particular location clear hot dry conditions develop winds westerly world associated low pressure systems tropical cyclogenesis monsoon trough significant genesis region tropical cyclones rich low level environments significant low level spin lead better average chance tropical cyclone formation inherent rotation pre existing near surface disturbance sufficient spin convergence requirements tropical cyclogenesis appears day cycle thunderstorm activity associated monsoon trough roughly half julian mirrors tropical cyclone genesis near features genesis clusters weeks activity followed weeks inactivity tropical cyclones form features special circumstances tending follow cyclone west monsoon trough eastern asian monsoon normal orientation oriented east southeast west northwest tropical cyclones periphery westward motion reverse oriented oriented southwest northeast tropical cyclones tropical cyclone tracks shapes tend associated reverse oriented monsoon convergence zone south american convergence zones generally reverse oriented failure monsoon trough south equator eastern pacific ocean atlantic ocean southern hemisphere summer considered reasons tropical cyclones normally form regions noted monsoon trough lies near degrees north latitude pacific frequency tropical cyclones times greater lies closer degrees north
Monsoon trough